roof sheeting - a modern choice

VOL 16.6 september 2015 r38 incl. VAt

FOr the inFOrmed Architect

Roof sheeting - a modern choice• Concrete problems & repair

• The art of coating buildings

• Intelligent facades

journal 6 • september 2015

RegulaRs

trend hunter

5 stylish roof access

ConCepts & Visions

6 Cutting-edge

concrete design

green design

8 hi-tech forest canopy for

design event

15 highlights

36 decorex 2015

teChniCal solutions &

projeCts

80 modern facade revives

illovo junction

81 airports to be built in africa

81 52% growth puts

Walls&rooFs top in its

category

City Chat

88 intelligent facades to direct

the african sun

industry update

90 bloembuild brings together

architects and students

91 precast concrete awards call

for entries

93 major gypsum business

acquisition announced

96 Fresh face to lead iid

featuRes

dynamiC Cement & ConCrete

14 Feature: Caring for built

concrete

22 What do extenders bring to

the concrete mix?

23 the ins and outs of cement

wall finishes

24 Collaborating to advance

concrete solutions

29 mental hospital gets

waterproofing treatment

paint & Coatings

30 Feature: Coating buildings

to last a lifetime

rooFing & Ceilings

40 Feature: roof sheeting: a

modern application

48 simple, clever sustainability

54 roofing solutions answer

architectural needs

56 Ceiling insulation aids internal

comfort and compliance

60 Feature: Clay and concrete

roof tiles - a tried and trusted

option

64 a multifaceted roof for

multichoice City

70 swirling zinc roof realises

design vision

72 Ceilings that add value

74 a new generation of

affordable colour-coated steel

IN THIS ISSUE

2 Journa l 6 • September 2015 www.wal l sandroofs .co .za

TREND HUNTER

Marlene van Rooyen, Editor & Business Unit Manager

Facebook www.facebook.com/buildinganddecor

twitter @buildinganddecor

Pinterest pinterest.com – search for Building&Decor

website www.wallsandroofs.co.za8

Join our online community for the latest trends and updates.

ONLINEWEBSITES

SOCIALMEDIA

www.floorsinafrica.co.zawww.wallsandroofs.co.za

www.buildinganddecor.co.za

@BuildingDecorfacebook.com/buildinganddecor

FREE DIGITAL SUBSCRIPTIONSwww.freemagazines.co.za

MAGAZINE

www.wallsandroofs.co.zawww.floorsinafrica.co.za

Join our community NOW!

YOUR FREE GUIDE TO ALL WALLING,

FLOORING & ROOFING INFORMATION

A b e Au t i f u l wA l l c A l e n dA r f o r yo u to k e e p ! this issue has a beautiful wall calendar for you to put up in your office. Featuring lots of useful information, you can manage your productivity and your humour right there at your desk!

Kindly brought to you by the sponsors, this calendar has travel websites, top productivity apps, cocktail and coffee recipes and very useful websites for all manner of things to help make your life easier.

put it up at your desk and see it transform your life!

wA n t to w i n A 3 d p r i n t e r ? running low on Cpd points and you want to stand a chance to win a r20 000 3d printer for yourself? then book for one of our fantastic Cpd events. hosted in gauteng, they are fun-filled, super informative and you can win great prizes in the lucky draws!

if you book for our october 9th event and our march 2016 event, you might win your own super 3d printer!*

our october event is a morning event, includes breakfast and focuses on green buildings: the building & beyond. topics include an example of taking a building off grid, energy regulations update and practical application of the new interior ratings tool. you can earn yourself 0.5 Cpd points in category 1 and be done by lunch.

Space is limited – BOOK NOW!

To find out more about our events, contact 012 347 7530. enjoy the read! *t’s & C’s apply.

3www.wal l sandroofs .co .za Journa l 6 • September 2015

TREND HUNTER


TREND HUNTER

media in africa (pty) ltd

marlene van rooyen

083 327 3746

[email protected]

@marlene_rooyen

liezel van der merwe

@liezel_vdm

schalk burger (1943 – 2006)

Fanie Venter

gerda Cowley

Zuerita gouws

[email protected]

shayne lessing

082 945 5030

[email protected]

ilze pöhl

[email protected]

alet van der merwe

elizabeth botha

lizzy mathibela

business print Centre

publisher:

editor:

'

8

publishing Manager:

Founder:

Financial director:

Financial Manager:

business unit coordinator:

8

advertising Manager:

'

8

designer:

8

Journalist:

prooFreader:

reception:

reproduction & printing:

contact inForMation:

international: tel +27 12 347 7530

Fax: +27 12 347 7523

e-mail: [email protected]

www.wallsandroofs.co.za • www.mediainafrica.co.za

www.freemagazine.co.za

Facebook: www.facebook.com/buildinganddecor

twitter: @buildingdecor

po box 25260, monument park, 0105, republic of south africa

First Floor, unit g, Castle Walk Corporate park

Cnr nossob & swakop streets, erasmuskloof ext. 3

reasonable care is taken to ensure that articles and other information in this is-sue are up to date and as accurate as possible at the time of publication, but no responsibility can be taken by Walls & rooFs in africa or media in africa for any errors or omissions contained herein. Furthermore, responsibility for any losses, damages or distress resulting from adherence to any information made available in this magazine is not the responsibility of Walls & rooFs in africa or media in africa. the opinions expressed are those of the authors and do not necessarily reflect the views of the publisher. Walls & rooFs in africa or media in africa cannot be held responsible for inaccuracies in colour reproduction. We try our utmost to represent the colours correctly, but due to the printing process, colour variations may occur. the publishers accept no responsibility for magazines that are either damaged or not received by subscribers due to postal error.

Established in 1983

LOcaL & INTerNaTIONaL aWardS

VOL 16.6 september 2015 r38 incl. VAt

FOr the inFOrmed Architect

Roof sheeting - a modern choice• Concrete problems & repair

• The art of coating buildings

• Intelligent facades

For your Free digital Copy

www.freemagazines.co.za

e-mail: [email protected]

tel: +27 12 347 7530

S U B S C R I B E

taKe it anYWhere!

on the cover

the roof for the recently completed multichoice headquarters in randburg comprises two different profiles - global roofing solutions’ Klip-lok 700 and brownbuilt concealed-fix profiles. the Klip-lok 700 makes up the main, top portion of the roof, while the brownbuilt was installed underslung as a soffit sheet.

spanning between 12m and 13m, the Klip-lok 700 was a good choice for forming the canopy on the Western side of the building. the roof overhang of 8m provides shade over the glass façade to reduce glare into the building as well as the need for artificial cooling.

the building was designed by glh architects and the roof was installed by Cladco projects. read more on page 64.

photo courtesy of glh architects.

scan here for a photo gallery of other projects by global roofing solutions.


TREND HUNTER

St yl i Sh roof acceSS high-quality roof hatches allow daylight into the living space below without compromising thermal or sound insulation. made from glass or polycarbonate, it can be operated by remote control.

Website: roofaccesshatches.co.uk

Sh i pp ing conta iner homeSQuality, durability and price make shipping containers ideal for inexpensive, high-quality, sustainable housing. a good replacement for shacks, they can also be used to build clinics, schools, stores and more.

Website: berman-kalil.co.za / www.maersk.com


CONCEPTS & V IS IONS

Exemplifying progressive design that applies cutting-

edge 3D technology in the use of concrete, this year’s

winner of the WAN Concrete in Architecture Award

2015 shows off the versatility of the material.

he niigata City Konan Ward Cultural Centre, designed by Chiaki arai urban & architecture design, intended to tie together a detached library, local museum and communi-ty centre and add a multipurpose theatre to the complex.

While these four zones each has its own entrance, they are con-nected by a pleating corridor called the Cross street, which fea-tures diverse expressions of concrete.

S h o w i n g o f f w i t h co n c r e t ethroughout the building, 3d patterns were used to texture the surface of the asymmetrical decorative walls, while solar-powered led lights highlight these bold concrete expressions. in addition, the concrete polygon structure follows the space and distributes

light and air through the complex. this is achieved by fissures in the concrete skin, which acts as a breathing mechanism.

Complementing the uneven wall surfaces is the inconsistent space created by the installation of movable sliding walls. these walls can be moved to create bigger or smaller rooms in order to maximise the limited space. other individual rooms, such as the music practice room, are vertically nested into the structure.

M u lt i p u r p o S e h A l linside the 413-seat multipurpose hall, bands of light accentuate the curves of the stepped side walls and ceiling. the side walls are also randomly punctuated with 7 000 circles, with each one either adding light, promoting noise diffusion or absorbing sound.

the stage is configurable and to achieve this, a support mechanism was attached to the concrete structure at the back of the stage, which can add about 3m to the depth of the stage. this configuration makes it possible to convert the otherwise small-scale hall into one that can host large orchestras.

Cutting-edge ConCrete design

the Cross street features irregular shaped walls. © Kouichi satake


CONCEPTS & V IS IONS

Full thanks and acknowledgement are given to World architecture news, Chiaki arai urban & architecture design and arch daily for the information given to write this article.

View a photo gallery of the award-winning concrete project. scan here.

Q u i c k fAc t S :architects: Chiaki arai urban and architecture design

Location: niigata, japan

area: 5 002m²

Project year: 2012

b l e n d i n g w i t h t h e l A n d S c A p ebuilt on an unlevelled wetland site, the centre’s foundation fills the lower land to level the different building heights and make use of terrestrial heat. the copper-cladded exterior will, over time, be covered with a patina layer that will blend the building with the surrounding rice field.

top: the exterior view from the east. ©taisuke ogawa

left: the first floor of the library. ©taisuke ogawa

right: the café. © shinkenchiku-sha Co. ltd


GREEN DES IGN

Hi-teCH forest Canopy for design event Known for her fascination with organic forms, AL_A’s Amanda

Levete’s movable, weather-responsive forest canopy design will

be the focal point in the Queen Victoria Gardens from October

2015 to February 2016.above: mpavilion during daytime. render by al_a, courtesy of mpavilion


GREEN DES IGN

art of the annual mpavilion architecture commission and design event in melbourne that was founded in 2014, ev-ery year, for four years, a different architect gets the op-portunity to design a temporary pavilion to be placed in

the Queen Victoria gardens.

n At u r e - r e S p o n S i v ethe design of this year’s mpavilion answers the brief of responding to the climate and the landscape, with biophilic attributes of bringing a functional space into nature that engages its natural melbourne parkland setting.

the pavilion will be made up of ultra-thin translucent petals supported by tall and slender, willowy carbon-fibre poles, which will sway back and forth in response to the wind.

“our design subverts the norms of immovable,” comments levete. “it embraces and amplifies such distinctions, so that it speaks in response to the weather and moves with the wind rather than trying to keep it at bay.”

e x p e r i M e n tAt i o n i n A r c h i t e c t u r ethe design was approached from two angles, one to create an organic tree-like structure set among the trees and flowers of the gardens, and the other to experiment with man-made materials and push them with the help of advanced technology. experimentation with architecture has been a major emphasis for the design of the mpavilion for 2015.

al_a has involved the expertise of some of the finest boat builders to apply the latest nautical engineering technology to innovatively stretch the composites that will form the tree-like roof canopy. Working with an advanced composite and geometry specialist brisbane company, mouldCam, they are constructing petals that are between three to five metres in diameter but only a few millimetres thick.

the lightweight but high-strength mpavilion will be constructed with the help of Kane Constructions and arup.

c A p t u r i n g S o u n dthe petals that make up the forest roof canopy will also function as speakers through which sound can be recorded and played back. the built-in amplifiers in the petals will be wired through the carbon-fibre columns to prevent it from disrupting the seamless aesthetics of the pavilion.

l i g h t i n g to S e t t h e M o o dFor the architect, the pavilion’s presence at night was another big consideration since the site is overlooked by many high-rise buildings. levete wanted to create a glow on the roof canopy when seen from above, which will filter down to the deck below.

therefore, integrated led strip lighting will be installed where the poles and petals meet to create a glowing halo effect. during the day, sunlight will dapple through the canopy, creating an ambient meeting place.

an idea for a public programme that will respond well to the design, levete suggested that a series of bed-time stories be read by an actor at dusk to kids lying on the floor and bean bags, because “somehow this captures the slightly ethereal, dreamy quality that we want to create”, she says.

f u n c t i o n A l A n d S u S tA i n A b l esituated in an underutilised environment that is close to the city and transport, the mpavilion has become an important meeting place during summer, bringing people together in nature, in the heart of the city.

according to mpavilion founder and patron, naomi milgron, the design also stays true to the annual commission’s social and cultural legacy for melbourne. “architecture is about experience and ultimately enhancing people’s lives – mpavilion 2015 offers people a meeting place for ideas.”

While this design is only a temporary one, the structure is planned to be gifted to the City of melbourne to be used elsewhere in future. the 2014 structure, designed by sean godsell architects, has been donated to the hellenic museum, where it is open to the public and currently being used for functions and programming.

Full thanks and acknowledgement are given to www.mpavilion.org, www.ala.uk.com and www.arup.com.

Forest canopy highlights:

• petals that are 3m and 5m in diameter, but only millimetres thick.

• slender, bendable carbon-fibre poles.

• innovative application of composite materials.

• responsive to nature, particularly wind.

• seamless wiring of audio system.

• integrated led strip lighting.

• Creates a meeting space in nature.

listen to an interview with the architect, amanda levete - scan here.

the ultra-thin petals will create the sensation of a forest canopy. © Kane jarrod


GREEN DES IGN


Composite Cladding a l igHtweigHt optionApplied as both external and internal architectural

cladding, aluminium composite panels and louvres

can play a major role in reducing the load of a

building since they are much lighter than other

cladding materials such as solid aluminium, metal

and granite.

tms solutions, based in Kempton park, supplies, fabricates and installs these aluminium composite panels and louvres for both commercial and residential applications.

c r e At i v e A p p l i c At i o n Sapart from cladding, these panels can also be installed as partitions, false ceilings, for signage and as machine coverings for

container construction, offering architects and home owners a wide range of options for design and function.

the louvres offer screening and ventilation for sun-control purposes, together with security, privacy and aesthetic benefits.

being imported, these aluminium composite panels and louvres have passed rigorous tests in various countries and come with a 20-year guarantee. recently, aluminium windows, doors and gates, plant pots and polyester mesh have been added to tms’ product range.

f l e x i b i l i t y i n d e S i g naccording to senzo ndumo, operations director and partner at tms Cladding and louvre solutions, aluminium composite panels can be produced in various forms through processes such as cutting, bending, punching and drilling.

p lu S p o i n t S“these panels boast self-cleaning and insulating properties, are fire-retardant, quick to install and do not require painting,” ndumo points out.

“aluminium composite panels comprise a thermoplastic core of polyethylene, giving it excellent heat and sound insulation, and being coated with a pVdF coating composed of Kynar500®, it is durable and weather-resistant thanks to its anti-corrosion and anti-pollution properties,” he explains.

k i n d to t h e e n v i r o n M e n tboth the polyethylene core and aluminium coil of the aluminium composite panels can be completely recycled and reused in new materials, and meet the national standards on green and environmental protection for construction materials.

tms Cladding and louvre solutionstel: 011 393 6033Website: www.tmssolutions.co.za

Successful projects:

• saturn autobody, gezina, pretoria.

• niCs, hatfield, pretoria.

• Wetback, bedfordview, johannesburg.

• tile africa, garsfontein, pretoria.

• bearing Corporation, edenvale, johannesburg.

• spar, Kilnerpark, pretoria.

Tests passed:

• usa: astm d903-98: 2004.

• eu – en 438-2: 2005.

• switzerland: iso 9001:2008.

• australia/new Zealand: as/nZs 1530.3:1999.

• united Kingdom: bs 3900-di:1998.

• germany: din 53315: 1996.

aluminium composite panels were applied as a feature structure at the entrance of Wetback in bedfordview, as well as a perforated screen on the side of the building.

tms installed an aluminium screening louvre for tile africa in garsfontein, pretoria.


GREENDES IGN

TMS Cladding & Louvre Solutions

Tel: +27 11 393 6033 • +27 83 319 9890 • +27 79 485 7696

Email: [email protected] • [email protected]

Website: www.tmssolutions.co.zaPhone us today

Architectural facade solutions:• Facade aluminium composite cladding.

• Signage pylons.

• Sun-control louvres.

• Ventilation louvres.

• Screening louvres.

TMS Cladding & Louvre Solutions expertly designs, fabricates

and installs aluminium cladding. Thanks to in-house skills and

equipment, we offer a quick lead time, flexibility in design and

a proficient service from start to finish.


GREEN DES IGN

his innovative tile adhesive range includes the light-weight porcelain profix 6 hour, lightweight porcelain pro-fix 12 hour and lightweight porcelain profix 24 hour, each of which can be used on a variety of different substrates

for interior and exterior applications.

k e y At t r i b u t e Styl-pro’s lightweight range significantly reduces the weight of applied tile adhesive for the same coverage as conventional systems. in fact, it is 25% lighter than other conventional adhesive systems currently on the market.

this contributes to greener buildings since less weight is added without compromising the amount of product used. the load on the foundations of high-rise buildings is lessened, transportation costs are reduced, and the lighter product is easier to physically handle and apply.

the lightweight adhesive boasts improved flexibility over conventional tile adhesive systems as well as excellent workability, which increases the speed of installation. in addition, its thermal properties ensure that the product warms up quicker and retains heat for longer than other systems.

Z e r o v o c S all tyl-pro’s eco-friendly adhesives contain zero VoC’s and no solvents. they emit minimal odours and cut the growth of mould and bacteria.

some adhesives in the market contain high VoCs that can aggravate allergic reactions and cause respiratory infections. moreover, these organic chemicals hold a high vapour pressure at room temperature, which is extremely harmful to the environment.

the environmental protection agency (epa) has identified indoor air pollution as one of the four greatest risks to human health.

A p p l i c At i o n i n g r e e n - r At e d b u i l d i n g Styl-pro’s eco-friendly tile adhesive range can be applied in buildings aiming to obtain green star sa ratings from the gbCsa. in the indoor environment quality category, which recognises “interior finishes that minimise the contribution and levels of volatile organic compounds (VoCs) in buildings”, the products’ zero VoCs counts towards the credit. in addition, the range helps to achieve two credits in the materials category, in terms of dematerialisation, which awards designs that reduce the total material used in a building, as well as local sourcing, recognising products that were sourced locally, close to the building site.

tyl-pro adhesives’ lower emissions matched with high performance provide built environment professionals with a sustainable option to address indoor air quality and other environmental issues in buildings. What’s more, the range will be expanded with new products to be launched soon.

tyl-protel: 011 762 1179Website: tylpro.co.za

tyl-pro’s lightweight range of tile adhesives.

Tyl-Pro’s eco-friendly, lightweight range of tile adhesives has sustainable attributes that contribute to the

wellbeing of a building’s occupants, and is therefore fit for application in green buildings looking to obtain

Green Star SA ratings from the Green Building Council of South Africa (GBCSA).

The LIghT WeIghT adheSIve BOaSTS ImPrOved FLexIBILITy Over cONveNTIONaL TILe adheSIve SySTemS aS WeLL aS exceLLeNT WOrKaBILITy.

tyl-pro lightweight range of tile adhesives.

l igHtweigHt tile adHesive for green buildings

The raNge WILL Be exPaNded WITh NeW PrOducTS TO Be LauNched SOON.


GREENDES IGN


DyNamIC CEmENT & CONCRETEF e at u r e

Continues on p16

the undulating concrete roof “floats” over the house.

Courtesy of Vdmma

caRing foR built concRete

Concrete is often used as the base material for buildings, but it is also

creatively applied as an expressed material where its raw, natural

appearance is exposed in finishes and features.

“ t is a timeless material that doesn’t date,” notes architect nico van der meulen. “aesthetically you can achieve so many different textures and looks by exploring various types of shutters. Concrete has the strength required for structural members and can also be moulded into the most intricate forms

thanks to the advancement of self-compacting concrete.”

wAv y co n c r e t e r o o fSat the foothills of table mountain, the rolling concrete roof of the mountain house is an illustration of what can be achieved with innovative concrete design.

a project of Van der merwe miszewski architects (Vdmma), the house includes a series of terraces that are inserted into the landscape.

“the roof of the pavilion has an undulating concrete surface and is propped up on a very fine steel structure hovering over glass. the idea was to make the roof look as light as possible so that it seems as if the concrete is completely floating on top of the structure,” notes lloyd rubidge, director at Vdmma.

the rolling waves were achieved using a technique similar to that of making a framework for boat building, to shape the shutter work that the concrete was cast onto.

p r e c A S t co n c r e t e o n 1 S i loanother Vdmma project, 1 silo showcases expressed precast concrete both externally and internally. according to rubidge, the huge precast panels on the west facade were done in two forms – some being flat and smooth and the others ribbed.

“most of these were done with a silicone form liner that was purposely made for this project to create the texture on the concrete. the image ‘1 silo’ was also embossed into the liner, which left the lettering in the concrete,” he explains.

internally, the concrete columns are exposed, extending all the way up to the exposed concrete roof and soffits.


DyNamIC CEmENT & CONCRETE

“cONcreTe haS The STreNgTh requIred FOr STrucTuraL memBerS aNd caN aLSO Be mOuLded INTO The mOST INTrIcaTe FOrmS.”

F e at u r e


dynamic cement & concrete

Continues on p18

co n c r e t e g A r Ag e d o o r Spushing boundaries with the use of concrete in architecture, nico van der meulen architects have designed four concrete garage doors to match the monolithic design of a concrete house. “using ordinary garage doors would have detracted from the concept, so we tried something extraordinary to achieve our design vision,” he says.

the smaller doors measure approximately 2,4m high by 2,4m wide, each weighing 1,3 tons, while the larger doors are 4,5m high by 2,4m wide, weighing just over 2 tons per door. these were cast on site and hoisted into position using cranes.

the doors are only 75mm thick and framed with steel channels to prevent the corners from chipping. they are carried by linear motion sliders imported from japan and guided by top

rails. “these rollers are designed to carry excessive loads and make it possible for a person to open them singlehandedly. We will, however, be installing industrial motors for the large door,” Van der meulen explains.

When working with concrete, depending on the application, Van der meulen strongly recommends getting a specialist to specify the mixture of the concrete specific for the application.

co n c r e t e M i x Q uA l i t ypeter mcardle, specification consultant at mapei, confirms that the main issue with new concrete is poor quality control on site, with regards to the design of the concrete mix, but also in terms of the application and design of the formwork that encapsulates the concrete.

“issues such as spalling tend to happen much quicker if the concrete isn’t of good quality or if there is a lack of adequate cover, which makes chemical attack likely at a much earlier stage than normal. the lack of concrete cover is a killer,” he states.

ivor boddington, technical manager at a.b.e Construction Chemicals Chryso group, adds that this is particularly a problem in coastal regions and environments that pertain to aggressive environmental conditions such as chemical plants. “if the cover on the reinforcing is inadequate, corrosion is rapidly initiated through chloride or carbon dioxide ingress through the concrete,” he says.

“there is little solution for bad concrete but to pull it down and rebuild.”

the West façade of 1 silo comprise expressed precast concrete panels with glass bay windows. photo courtesy of V+a / hoberman

Continued From p15

embossed letters on a ribbed concrete surface. photo courtesy of V+a / hoberman



M A i n tA i n i n g co n c r e t e S t r u c t u r e Sin addition, maintaining concrete structures and addressing problems as soon as they emerge, will avoid costly repairs later when the problem becomes advanced.

“it is an accepted fact that concrete is not maintenance free” states Wayne smithers, head of technical services at sika south africa. “there is a constant attack on the reinforcement in concrete structures and if the concrete is not coated and regularly inspected, it can reach a stage where it is a huge cost to fix problems.

“it is like a cancer – while you might see some evidence of corrosion, you don’t always realise how bad it is until you start investigating. and one can do cosmetic cover-ups, but the problem will only get worse if not properly diagnosed and addressed,” smithers warns.

wA r n i n g S i g n SWhen reinforced concrete starts corroding, the first signs are usually sections of concrete cracking, as well as weeping rust stains down the concrete surface.

“While a few cracks here and there might not look that bad, when recognising these signs, building owners should get a proper diagnostic survey done to determine exactly how bad the problem is in order for them to implement a strategy for repair,” smithers advises.

co r r o d i n g r e i n f o r c e M e n tChemical attack is by far the biggest cause of concrete problems requiring repair. mcardle explains that when reinforcement is put into fresh concrete, it is naturally protected by the natural high alkalinity in the concrete. however, concrete loves to attract moisture.

Continues on p20

Continued From p16

before: a case of concrete cover that has deteriorated, exposing pieces of rebar.

after: the repaired concrete surface. photos courtesy of sika

after: the bridge after the spalling was repaired.

photos courtesy of a.b.e. Construction Chemicals

before: Concrete spalling.

common concrete problems:

• bad concrete mix quality.

• inadequate quality control on site.

• Chemical attack causing corroding reinforcement.

• alkaline aggregate reaction.

• structural damage.



Bu i ld ing in t ight SpotSit is always tricky to do any kind of construction on a steep slope, but the challenge escalates even more when it is close to other property boundaries or when the space is very narrow. in a residential setting, wanting to create usable flat areas, much of the garden space may be taken up by banks and steep slopes that link them together.

this is where the beauty of versatile retaining walls, such as the terraforce retaining system, comes in. retaining walls provide a way of changing levels sharply, which is especially useful if space is tight. stairways and ramps can also be integrated to facilitate quick access to the workable spaces created.

r e tA i n i n g wA l l r e p l Ac e dthis was evident at a house in Camps bay, where homeowner sue schalit noticed that her original stone retaining wall was showing cracks and slight forward movement. Concerned that it would collapse and cause damage to the garden and neighbouring properties, she hired mike van Wieringen, a geotechnical consultant, to inspect the wall.

“his report not only verified movement, but also revealed that the foundations were inferior,” says schalit. “he recommended a terraforce wall as it has the least impact on our garden and is an exceptionally strong retaining wall solution.”

the new wall was designed by Fred laker, an engineer at terrasafe, a professional wall design service offered by terraforce, and schalit contracted dassenberg retaining, an approved Western Cape terraforce installer, to build the new retaining wall.

c h A l l e n g i n g co n S t r u c t i o n S i t eaccording to georg brand from dassenberg retaining, the site was not an easy one to access and it offered very limited work space. “all the materials had to be carried to the workstation by means of bags down three staircases. spoils had to be carried up to road level. the whole process was very labour-intensive,” he explains.

Furthermore, to ensure additional strength and due to the height of the wall, the lower section of the retaining wall had to be reinforced with y12 steel rebar.

the wall was completed in less than three months and schalit was very impressed with the dassenberg team and the resulting wall. “the team from dassenberg was incredible, working in tough circumstances, carrying tons of rocks up by hand. the wall is extremely neat and i am very happy with the result,” she comments.

terraforce

tel: 021 465 1907

Website: www.terraforce.com

a tight fit: this terraforce retaining wall was constructed in a constricted space.



inland, the dissolved carbon dioxides in the moisture in the polluted atmosphere penetrate into concrete and react with the calcium that naturally occurs in concrete and cement. this chemical reaction creates a weak carbonic acid that is drawn towards the rebar.

“this reduces the ph of the concrete from 13 or 14 down to about 9, which makes the rebar vulnerable. and with the moisture and oxygen that are present, rust starts to form around the rebar and because concrete doesn’t have tensile strength, it starts to spall and break,” mcardle clarifies.

at the coast, water borne chloride ions enter the concrete and start pitting the rebar. according to smithers, this is most prevalent within 5km of the coast, where salt deposits and wind-driven rain onto concrete structures amplify chloride attack.

“When steel corrodes, it expands up to eight times its original volume and puts a force on the covercrete, causing pieces of concrete to break off and exposing the rebar to the elements. Corrosion lessens the effective strength of the steel as the cross-sectional area of the rebar diminishes and eventually the structure may collapse,” he says.

smithers advises that in order to repair, the contaminated area of concrete needs to be broken out, and the rebar needs to be cleaned and coated with a protective coating, after which the cavity should be filled with a proprietary branded mortar or grout.

“Quite often, sections of rebar also need to be reinstated. Where less than 10% of the rebar is left, the damaged section should be cut out and replaced,” says smithers.

g uA r d Ag A i n S t co r r o S i o npreventing corrosion starts with the design and construction of durable concrete for structures, according to boddington. “there are additives available that can be mixed into the concrete, as well as protective coatings and pentrants for structures to reduce problems. migrating corrosion inhibiters is one of the newer technologies that also assists in reducing the onset of corrosion on steel in concrete.

“however, these solutions are often overseen in the design phase, resulting in the need for repairs later on,” he states.

smithers adds that galvanic anodes are another technology being used increasingly to reduce the effects of corrosion on the reinforcement. “it is tied to the rebar when local repairs are done, or by coring holes and embedding the anodes into the concrete,” he says.

Cement based coatings are now available for the protection of exposed concrete that will protect against carbonation and chloride attack, and, if applied by a competent sub-contractor may be warrantied for 20 years according to mcardle.

A l k A l i n e Ag g r e g At e r e Ac t i o nanother potential problem occurring in concrete is alkali aggregate reaction, according to mcardle.

“a good example is the m1 double-decker bridge between braamfontein and newtown,” he says. “When it was constructed, quarries in and around johannesburg couldn’t cope with the

the concrete doors are carried by linear motion sliders.

Courtesy of nico van der meulen architects

Continued From p18



demand for aggregates due to major expansion in the city and aggregates were brought from Cape town. however, the Cape aggregates reacted chemically with the local cements, causing a type of rust to form around large aggregate stones. this has the same effect as a rusting rebar since it eventually cracks the concrete,” he explains.

mcardle points out that in both the cases of rebar corrosion and alkaline aggregate reaction, if either the oxygen or moisture can be stopped, corrosion will also stop.

“now it is very difficult to block oxygen since it is a gas that penetrates concrete easily, but moisture can be managed. to do this efficiently though, one needs a product that allows concrete to breath by allowing water vapour in and out. since water vapour is such a small molecule, nothing will dissolve in it,” mcardle states.

according to boddington, penetrating chemicals can render porous surfaces hydrophobic – not letting moisture in, but allowing vapour to expel, thus reducing the moisture content within the structure. “once you reduce the transition rate of moisture ingress, you also reduce the transition ingress of deleterious soluble salts and compounds that are carried in the water,” he says.

S t r u c t u r A l dA M Ag e c Au S e d by i M pAc t o r d i S A S t e rmechanical damage happens when a truck collides into a motorway bridge, fire damage to concrete building elements,

or when design or construct criteria is not quite adequate and elements move and break apart.

before repair is affected on structural damage, boddington stresses the importance of doing a thorough assessment to determine the cause, extent and the best way for repair. “there is a host of repair mortars available, from cementitious systems and epoxy systems for repairs, including related primers, and protective coatings, but it is also necessary to ensure that after substrate preparation the concrete is sound because effecting repairs on unsound or poor concrete is pointless,” he states.

smithers points out that when doing structural repairs, mortars are mostly superficial and don’t reinstate the structural integrity of the concrete that has been taken out. therefore each structure should be assessed on a case-to-case basis and it is wise to involve a structural engineer to determine whether the damaged concrete requires a structural or cosmetic repair solution.

Full thanks and acknowledgement go to Van der merwe miszewski architects, nico van der meulen architects, mapei south africa (pty) ltd, a.b.e Construction Chemicals and sika south africa for the information given to write this article.

scan here for more photos of the projects mentioned in this article.



What do ex tenderS Br ing to the concrete m ix?the practice of adding ground-granulated blast-furnace slag, fly-ash or silica fume to the concrete mix offers important advantages, according to bryan perrie, managing director of the Concrete institute.

apart from cost savings that result from extenders generally being cheaper than portland cement, extenders improve impermeability and durability of hardened concrete and often enhance the properties of concrete in its fresh and hardened state. as most extenders are secondary products from other processes, their use also plays a role in reducing greenhouse gas emissions.

f i n e f i l l e r e f f e c t“Cement extenders are less reactive than portland cement,” notes perrie. “this reduces the rate of early-age strength gain which affects the rate of heat development due to cementing reactions.

“extremely fine extender particles act as nuclei for the formation of calcium silicate hydrate, which would otherwise form only on the cement grains. this brings about a denser and more homogeneous microstructure of the hardened cement paste and the aggregate-paste interfacial zones, resulting in improved strength and impermeability,” he explains.

he adds that concrete which contains an extender produces heat at a slower rate than similar concrete made with only portland cement, which reduces the likelihood of thermal cracking.

“however, improvements to the properties of hardened concrete brought about by the use of extenders, can be fully realised only if the concrete is properly cured,” perrie cautions.

the Concrete institutetel: 011 315 0300Website: www.theconcreteinstitute.org.za

building with concrete.



the inS and outS of cement Wall f in i SheSWhen choosing finishes, it is best to make an informed decision and offering some insight into cement-based finishes, Cemcrete answers a couple of frequently asked questions:

w h y A r e c e M e n t f i n i S h e S S o p o p u l A r ?Cement finishes are timeless and they fit nicely into current trends as they are an adaptable, solid base. Cement finishes are the perfect example of a synergy between beauty, sustainability and economy, which will last the life of your home.

w h At A r e t h e i n S tA l l At i o n c h A l l e n g e S ?the installation process is not a quick or easy alternative to generic finishes such as paint or tiles. Cement-based finishes take time to apply, but as a result last a lifetime. Cemcrete products are hand-applied by specialised applicators, although the product may be the same, the movement of the trowel, the mixing ratio, the temperature of the day and the style of the contractor will all add to the individual flair of the final finish.

i S c e M c r e t e S u i tA b l e f o r A l l A r e A S ?yes, Cemcrete can be used on all wall areas, interior and exterior, durable enough to withstand the african conditions. bathroom

walls can extend into the shower and even the bath, and in kitchens these finishes are easy to wipe up clean.

w h At co lo u r S , f i n i S h e S A n d t e x t u r e S A r e AvA i l A b l e ?Cemcrete offers a range of smooth or textured natural colours with matt or gloss sealers. trowel-on finishes can be further enhanced with various imprinting mats. the final outcome is natural mottling and subtle movement, and these finishes can look quite different on different sites.

w h At A b o u t M A i n t e n A n c e ?Cement-based finishes are very easy to clean and maintain. a good quality sealer helps it to resist water, stains, dirt and abrasives. since cement, by nature, is not flexible, hairline cracking is normal and adds to the natural look and feel.

Cemcretetel: 0860 CemCreteWebsite: www.cemcrete.co.za • blog: blog.cemcrete.co.za

Cemcrete off-shutter Cemplaster.



ne of the functions of the afrisam Centre of product ex-cellence is ongoing product development. “We invest in finding fit-for-purpose concrete solutions, a journey that begins with a detailed site visit by one of our experienced

technical consultants,” says mike mcdonald, manager of the centre.

o n - S i t e A n A lyS i She explains that consultants collect material samples and ascertain specific information on curing temperatures, mixing temperatures, as well as any additives and accelerators being used. the gathered data and samples are subjected to analysis at afrisam’s material laboratory at the centre, after which the consultants are able to draw up possible solutions.

in order to produce real customer centric solutions, the centre emphasises knowledge sharing to maximise product implementation. “by familiarising our customers with our products and solutions, we can together uplift the standard of concrete solutions in the industry,” states mcdonald.

d e A l i n g w i t h co n c r e t e S u p p l e M e n t S leveraging its intimate knowledge of its own products, afrisam also works closely with commercial admixture companies to develop activators that will ensure normal concrete performance, even when high levels of supplementary cementitious materials are added.

the differentiating factor for successful cement suppliers in the future will be whether they are able to find cost-effective

solutions that do not compromise on quality. this is why working collaboratively with customers and other partners is critical for the company.

r e S p o n S i b l e o p e r At i o nafrisam’s Centre of product excellence has a number of key drivers that work towards increasing customer satisfaction and productivity, according to mcdonald. an ongoing hot topic is environmental stewardship, and a number of afrisam initiatives underpin the company’s intent in this regard.

“Cement and aggregates are scarce resources and afrisam believes that their use should be optimised,” mcdonald points out. “by gaining a thorough understanding of the material properties and how to apply them, as well as an understanding of concrete technology, we can ensure viable solutions.”

the Centre of product excellence is actively involved in day-to-day customer interactions in terms of technical queries. this support function is undertaken by a team of skilled and experienced individuals who fully understand the application of products.

Courses facilitated by the Centre of product excellence range from a high-level course for engineers who already have a working knowledge of all the material, right down to a beginner level.

afrisamtel: 011 670 5834Website: www.afrisam.com

Collaborating to advanCe ConCrete solutions

In its quest for achieving excellence,

AfriSam is working collaboratively

with customers and commercial

admixture companies to advance and

customise solutions that consider

specific application.as part of its service offering, afrisam’s technical consultants will visit a customer’s site to assess product application and possible challenges.



CHurCH restored witH HydropHobiC impregnation teCHnologyConstructed in the late 1930s, the German Lutheran

Church in Augsburg on the border of Mpumalanga

and KwaZulu-Natal was finished off with a raw

mineral plaster constituting of a cement-hydrated

lime binder together with local washed plaster sand

out of the nearby Pongola River system.

ver time, the unprotected facade has degraded due to weathering and air pollution. this has led to dirt accumula-tion on the surface, which is drawn into the pores when rainwater runs down the walls, moss and algae growth

especially on the south side of the building, as well as efflores-cence and carbonation on the lower level of the building, where excessive splashback is experienced.

fAc A d e t r e At e dto restore the building to its former glory, the facade was treated with ite products’ imperVite® silane and siloxane technology. First the mineral plaster was scrubbed with a wire brush to remove all soiling and moss, after which the raw surface was cleaned with a high velocity air blower and soft bristle plaster brushes.

imperVite hW30 was then used as the hydrophobic impregnation agent. being water-based, it was applied by low pressure airless spraying. the product was flooded onto the surface, after which it was worked into the facade by plaster brush. a second coat was applied over this on a wet-on-wet basis.

the imperVite hW30 hydrophobic silane/siloxane solution creates an excellent beading effect, which prevents any water from entering into the facade. once water falls onto the surface, the beading effect facilitates an immediate runoff, disallowing any dirt from entering the pores of the exposed surface.

ite products (pty) ltd was the main sponsor in this revamp, with mondi sponsoring the use of the crane.

ite productstel: 011 864 4918email: sales @iteproducts.co.zaWebsite: www.iteproducts.co.za

ImPerviTe – Silane/Siloxane:

ite products’ new hydrophobic impregnation system, based on silane and siloxane technology from germany, can be applied on natural stone, concrete and cementitious plasters to permanently seal it. a reaction occurs between the silane/siloxane system and the silica matrix within the building material to produce a silicon resin network. if no silica matrix is present in the building material, then some is added. due to the very strong covalent bonding that occurs between the silica matrix of the material and the silicone resin network, a beading effect is created. this repels water, but allows water vapour to transpire through the material, thus resulting in the pores staying clean and free of water to prevent soiling, moss or algae build-up.

it furthermore creates a high resistance and stability against:

• high alkalinity (Ca(oh)2).

• Chlorides (barrier).

• temperature (up to 3500C).

• uV radiation.

source: ite product

after: restored to its former glory.

ite products’ team busy cleaning the surface.



Book for our October 2015 & March 2016 CPD events and stand a chance to win your own 3D printer.

BOOk yOur tiCkets with [email protected] / [email protected] or call 012 347 7530. *Prize includes a 3D Printer and training. *Images is a representation only. *Ts & Cs apply.

Manufactures, suppliers, wholesalers and trade by personal invitation only. Please enquire.

Topics:• Software to help design your green building• Energy regulations: update• The new interior rating tool discussed• Going off-grid: case study• Hi-performance roofing

susTainabiliTy: The building & beyond

Date: 9 October 2015time: 7:00am - 13:00pmVenue: Atterbury Theatre, GautengCost: R360 seated, including breakfast & marvelous goody bag

GOLD SPONSORS:PLATINUM SPONSORS:

stand a chance to win your own

3d prinTer

cpd archiTecT seminarlucky draw!



mental hoSp i tal getS Waterproof ing treatmentthe new reservoir at the mafikeng provincial mental hospital was sealed and all flat concrete roof areas and concrete walkways on roofs of the hospital were waterproofed with high-performance products supplied by sika.

the sikadur-Combiflex sg system, which allows for irregular movement, was used to seal all construction and expansion joints inside the reservoir. the system consists of a modified, flexible polyolefin (Fpo) waterproofing tape that is adhered to the concrete substrate by sikadur-31 dW, a modified, solvent-free, filled, two-part epoxy resin adhesive. then 200m of sikadur-Combiflex tape (250mm wide) and 240l of sikadur-31 dW were applied, both which have international approval for drinking water.

all concrete floors and walls of the reservoir, covering an area of 100m2, were subsequently coated with sikatop seal-107 Za, a two-part, polymer-modified cementitious mortar slurry, comprising a liquid polymer, cement-based fillers and special admixtures.

the flat roofs and walkways were waterproofed with 3 500 rolls each of sika blackseal t-140 pg, with a plain bitumen surface, and sika blackseal t-140 mg, with a slate granule broadcast surface. both products are torch-on, sheet waterproofing membranes, flexible to 0oC and based on app (atactic poly-propylene) modified bitumen that is reinforced with polyester non-woven fabric.

a sika blackseal system provides high tensile strength, resistance to water vapour and mechanical impact, and good dimensional stability. the range has passed stringent accelerated ageing tests for long-term exposure to ultraviolet (uV) radiation and elevated temperatures.

despite severe flooding that disrupted the time schedule, the ease of application of the specified sika products greatly assisted the contractors from tds Waterproofing.

sikatel: 031 792 5600Website: www.sika.co.za

the reservoir was sealed with sika’s sikadur-Combiflex sg system.

Book for our October 2015 & March 2016 CPD events and stand a chance to win your own 3D printer.

BOOk yOur tiCkets with [email protected] / [email protected] or call 012 347 7530. *Prize includes a 3D Printer and training. *Images is a representation only. *Ts & Cs apply.

Manufactures, suppliers, wholesalers and trade by personal invitation only. Please enquire.

Topics:• Software to help design your green building• Energy regulations: update• The new interior rating tool discussed• Going off-grid: case study• Hi-performance roofing

susTainabiliTy: The building & beyond

Date: 9 October 2015time: 7:00am - 13:00pmVenue: Atterbury Theatre, GautengCost: R360 seated, including breakfast & marvelous goody bag

GOLD SPONSORS:PLATINUM SPONSORS:

stand a chance to win your own

3d prinTer

cpd archiTecT seminarlucky draw!


Pa INT & COaT INGSF e at u r e

The coating or paint application is typically the last step of

construction, but one of the first things people see. And since an

application is often judged on face value, there is a lot of pressure on

suppliers and applicators to get it right, on time.

his takes careful project planning and skilfully trained applicators who can work under the pressure of tight deadlines.

in addition, according to babette mattheyse, project manager at Versus paint, a coating is only as good as the surface it is applied to. “one of the biggest

issues affecting both paint and coating applications is the plaster underneath it, which in turn can be affected by either the product mix or the application,” she says.

“if there are cracks, water that enters will cause the brick masonry and plaster substrate behind the paint to expand. Water also leaches portland cement paste out of the cracked surfaces, thereby softening and weakening the plaster adjacent to the cracks. it furthermore transports water soluble salts, particularly calcium hydroxide from within the cement paste to the surface where these salts are precipitated at the plaster or paint interface. the expansion of these salts at the interface caused the paint film to blister and delaminate, a symptom called efflorescence,” mattheyse explains.

“therefore surface preparation and plaster evaluation are crucial in ensuring that the surface is acceptable. if the surface fails, then the coating will also fail.”

co v e r i n g u p i M p e r f e c t i o n SWhat’s more, while uneven plaster surfaces won’t necessarily cause failures, the flaws are unsightly and detract from a building’s appearance. “this is the reason why coatings and cladding are so popular nowadays, because they are able to conceal imperfections,” mattheyse states.

“For rough bricklaying and uneven plaster, it is wise to choose a coating with body. While trowelled-on coatings follow the surface, ones that get sprayed on give a matt, rough finish that absorbs light and doesn’t show the defects,” she advises. “it is typically a product that is about 5kg/m², compared to a paint system which is about 1l/m² for a primer and two or three top coatings.” cONTINueS ON P32

main picture: part of plascon’s Colour Forecast for 2016, the element palette include soft neutrals and texture to create depth and contrast.

Courtesy of plascon

Coating buildings to last a lifetime


Pa INT & COaT INGS

a cOaTINg IS ONLy aS gOOd aS The SurFace IT IS aPPLIed TO.

F e at u r e


pa int & coat ingS

mattheyse adds that the most expensive element in any painting or coating project is the cost of labour so it makes sense to apply a quality product that exceeds the norms in terms of durability, thus reducing the need to repaint by several years.

r e S to r i n g t h e “ o l d l A d i e S ”When refurbishing ageing buildings, the surface is just as important to evaluate as on new builds. it is not always sufficient to just fix a crack or two and slap another paint coating on. With 21 years’ experience in the industry, brigitte prior, executive at promac paints, warns that should the coatings on a wall reach excessive thickness or if the old layers aren’t properly assessed, it could end up costing asset owners a lot of money as one can get delamination.

“delamination occurs at the substrate primer interface,” she says. “there are two distinct types of failure: adhesion between layers of paint and cohesion within a given layer of paint. upon inspection of these issues, new coatings have always adhered well to old coatings but the layers underneath have lost their adhesion and flexibility properties, causing them to pull away,” she explains.

coatings Paints

in-depth thickness mm µ (microns)

Quantity kg/m² l/m²

Coatings and paints are measured in different units.

t r e n d y coAt i n g Seuroplaster

regaining popularity since its glory days in the 80s, europlaster, a quarts-based acrylic plaster textured with sizing stones, is back with a courser, rougher texture than before. it has been specified for City lodge in newtown as well as mall of africa.

eurospray

a favourite for many new builds in sandton, eurospray is an acrylic-based coating sprayed with either a compressor or a hopper gun. however, the design of a building needs to be considered first since every surface area that is not supposed to be coated, such as glass surfaces, needs to be taped shut before spraying.

Natural stone (as seen at the maxwell Office Park in Waterfall city)

to achieve a similar effect as with eurospray, without the hassle, a natural stone coating can be applied together with a pigmented sealer or a natural colour stone.

Polish plaster

For building interiors, polish plaster is often applied with a spatula over gypsum plaster. polish plaster consists of crushed marble in an acrylic paste, which is sanded down after application and finished with a wax coat to achieve a glossy finish.

comb plaster

seen in a variety of new builds such as lynnwood bridge phase 3, comb plaster is another popular choice for both interiors and exteriors. Comb plaster can add about 7 to 8kg/m² and needs to be applied by a trained professional in order to get a neat finish.

dark coatings

to create the illusion of floating buildings, architects often go for dark coatings at the bottom of buildings to create a black base, while the top of the building is either cladded or coated.

Limewash paint

pure acrylic lime wash can be applied onto red travertine bricks or a similar surface to create a white lime wash appearance on the surface, as seen at the middelburg, heidelberg and Woodmead shopping centres.

trends courtesy of babette mattheyse from Versus paint.Comb plaster and age plaster were applied at illovo edge. Courtesy of Versus paint.

cONTINued FrOm P31


pa int&coat ingS

according to prior, this issue can be reasonably unforeseen and may only become an issue when new coatings are applied, so the case of who is responsible becomes unclear.

even when adhesion tests are done on the old coatings, they may appear sound but because there are so many layers, sometimes up to +300 microns, they are brittle and their adhesion becomes limited.

“a common cause of delamination occurs with a change of colour from a pale to a much darker topcoat” prior adds.

“the extra heat associated with the darker colour, changes the tipping point and delamination occurs.

the issue can be avoided by identifying the age and build-up of existing coatings and fully removing the old layers to create a sound substrate suitable for painting.

to e n S u r e A fA i l - p r o o f r e vA M p, p r i o r r e co M M e n d S A t h r e e - S t e p p r o c e S S :1. do a thorough assessment.

looking at the macro environment, factors such as uV, light, wind, rainfall, temperature, salt contamination and humidity of the area need to be considered, while the micro environment assessment will include extreme temperatures, dew point, industrial fall out, chemicals, high traffic and high maintenance like washing and scrubbing.

2. determine correct surface preparation and moisture levels.

the surface must be cleaned correctly with all loose and flaking paint removed and cracks repaired. should there be cracks in paint, there could be moisture in the wall that will cause inherent problems. it is important that moisture levels are below 8% and that surface temperatures are not excessive. it is also necessary to waterproof all parapets, ledges and sills to eliminate moisture ingression.

3. choose a light colour

to play it safe, go with lighter colours when painting over old coatings. dark colours attract more heat and if there is moisture in the walls, bubbles will form. dark colours expose walls to the volatility of heat up to 30% more than light colours.

S p e c i f y i n g w i t h A p u r p o S eWhen it comes to specifying paint or coatings for new or old buildings, it is important to ensure that a suitable coatings system is applied to the relevant surface.

pA i n t A d v i c e :• For water-based emulsion coatings, the

acceptable moisture level content of the substrate to be painted is 15% or less, as measured by a moisture meter.

• a recommended paint coating specifications system consists of a three-stage multiple components application process, including a primer, intermediate/undercoat and full finish coat.

• this application process needs to be accompanied by proper surface preparation (including a moisture content check), compliance with the right painting weather conditions, use of good quality products, application tools and qualified applicators.

advice courtesy of tracy robinson and helen gurura from dekade paints.

house Cellini showcases italic plaster and eurospray Course coatings. Courtesy of Versus paint.

“a cOmmON cauSe OF deLamINaTION OccurS WITh a chaNge OF cOLOur FrOm a PaLe TO a much darKer TOPcOaT” PrIOr addS.

cONTINueS ON P34

34 www.wal l sandroofs .co .za

selma leach, an industry expert with 24 years’ experience, believes that one of the biggest challenges in the paint industry currently is the lack of expertise, which result in incorrect specification, which in turn lead to failures. technically-minded sales representatives are scarce and though architects and specifiers can approach retailers for information, this is not advisable for corporate projects, which are often guarantee driven.

“it is important for specifiers to get the right information,” she says. “many paint companies offer standard generic specifications that include the substrate, correct preparation method and finishing coats, which is a great place to start, but ultimately, every building and substrate is different. Knowing the finer detail is extremely important and by involving a paint professional to cast an expert eye on the building, one can be sure to get the correct specification.”

instead of just throwing paint at a problem, leach stresses the importance of properly assessing existing flaws in a building. “once you

understand the condition of a building, the paint specification becomes abC,” she says.

“the dry Film thickness (dFt) on a standard plaster primer is about 35 - 45 microns thick, while two smooth top coats will add between 30 and 40 microns each, so ultimately the paint system will come to about 120 microns, which is only 0,12mm thick. since this thin film of paint is expected to protect a building surface, it is imperative to ensure, as a basic requirement, that the substrate is sound, clean and dry. Coupled with an appropriate system and no underlying construction or waterproofing issues, failures are highly unlikely,” leach states.

helen gurura, exclusive marketing manager and architectural colour specifications consultant at dekade paints, adds that a paint specification should be functional and geographic-specific to cater for the fluctuating climatic and weather variables.

“humidity, moisture, intense sunlight and temperature extremes are some of the core elements to consider. a product has to be matched

a room setting in plascon’s discovery colour palette. Courtesy of decorex sa.

purple path

light reFleCtion

light blue green

blaCK bean

Valentino rose

melloW gloW

cONTINued FrOm P33

*printed colours may vary from the actual paint colour.

Pa INT & COaT INGS

to its intended function to ensure longevity and success of the coating system,” she states.

according to gurura, local paint manufacturers are developing products that are highly functional, adaptable and optimally suited to counter some of these conditions, which have a direct impact on the performance of a coating system.

n e w d e v e lo p M e n t Sone of these is the development of an adhesion-promoted, pure acrylic, low-sheen coating with stain and dirt removal properties suitable for south africa’s coastal and highveld climatic conditions. it is specially designed to counter some of the common moisture-induced paint problems.

“the product’s advanced hydrophobic formulation allows the paint to breathe, thereby releasing trapped moisture from inside the walls, repelling water on the surface and preventing water from seeping back into the wall,” gurura explains. “it also contains inhibitors to prevent fungal and mould growth on the painted substrate, while the incorporation of colourfast pigments further enables longer colour retention on exterior exposure.”

according to leach, development of fibre-reinforced acrylic coatings further assists with great flexibility and bridging ability over hairline cracks. “in addition, these products can either be applied to a soft ripple or formed into a texture with application technique.”

mattheyse adds that new technology now also makes it possible to improve various paint properties that gives paint

the ability to cover slight plaster defects. “this technology offers water and stain resistant durability and wash-ability and meets the most stringent environmental and VoC regulations,” she states.

to ensure the successful application of paints and coatings, it is advisable to get first-hand advice from the experts to help select the most appropriate coatings for a project and ultimately get a finish that will both look great and last.

Full thanks and acknowledgement go to promac paints, Versus paint and dekade paints for the information given to write this article.

maTTheySe addS ThaT NeW TechNOLOgy NOW aLSO maKeS IT POSSIBLe TO ImPrOve varIOuS PaINT PrOPerTIeS ThaT gIveS PaINT The aBILITy TO cOver SLIghT PLaSTer deFecTS.

to view the latest standards related to paints and sealants scan here.


pa int & coat ingS

15 HigHligHts deCorex 2015WALLS & ROOFS visited Decorex Joburg, which included the 100% Design South Africa

exhibition, at Gallagher Convention Centre for the latest in décor, design and lifestyle

inspiration from some of South Africa’s most talented decorators and designers.

h e r e A r e 1 5 h i g h l i g h t S :1. media in africa’s “local is lekker” stand, promoting the Walls & rooFs and Floors titles.

2. plascon’s 2016 colour palette and paint effects.

2

1

pictures courtesy of decorex.


pa int&coat ingS

3. plantation shutters worked with home Fabrics and sprout to create an exquisite plantation setting.

4. Caesarstone inspired with shelving above and below the work station in a refined industrial setting.

5. burnt earth designs wowed visitors with their original ceramic tiles that add a handmade touch.

6. stephen Falcke’s floral design included the osborne and little fabric ranges from home Fabrics, art works by the designer and paper mache vessels by paper pot studio.

3 4

5

6


pa int & coat ingS

1 0 0 % d e S i g n S o u t h A f r i c A13. Featured designer, renee roussouw’s latest bright graphic designs.

14. ngwenya glass: made from recycled glass, each piece is handmade and mouth-blown by people from swaziland.

15. robin sprong Wallpaper exhibited incredible imagery for feature walls.

thanks and acknowledgment is given to decorex sa for the information and photos contributed to this article.

AwA r d S7. slate interiors won the best décor award, using home Fabrics, for their understated living room installation.

8. mike made this won an excellence award for his original and quirky wrought iron, metal and wooden furniture.

9. Factory 5 embraced the plywood furniture trend with organic shapes, which won them the best small stand award.

7

13

15

10. décor identity’s black and white bedroom in the private property trend house clinched the best bed and bathroom award.

11. Cleverest design award: studio grain’s table and shelf fold away into the wall for compact storage in small spaces.

12. david Krynauw won the designer award at the 100% design south africa awards with his fantasy-inspired bent wood designs.


pa int&coat ingS


ROOf ING & CE I l INGSF e at u r e

First picture: the roof and wall cladding on the nelson mandela metropolitan university bitumen laboratory was done in saflok 410 in Zincal.

Courtesy of safintra. second picture: the egg shaped walkway of the Flight simulator building was clad with brownbuilt concealed fix roof sheeting.

Courtesy of global roofing solutionsContinues on p42

Roof sheeting: a modern appliCation

Over the last decade, metal sheeting for roofs has gained significant

ground as a preferred roof covering option for modern buildings,

whether for residential, commercial or industrial buildings. WALLS &

ROOFS spoke to industry players to find out why and get their advice

on specifying sheeted roofs correctly.

“ rom an architectural point of view the main considerations when choos-ing a roof covering are aesthetics and longevity, and rheinzink roof sheeting offers just that,” comments stephen Wilkinson, business man-ager at rheinzink south africa.

“metal is a highly versatile material to form and drape, and can accommodate complex design demands which tiles or cementitious built-up roofs cannot,” says sally stromnes, strategic marketing planner for the safintra roofing group. “not only is metal roofing light yet very strong, but it also provides a truly watertight covering when correctly installed, with the appropriate flashings, closures and lap sealant. it is also more cost-effective than other roof coverings over the service life of the roof, which includes the costs of maintenance,” stromnes states.

d e S i g n v e r S At i l i t y p lu S S u S tA i n A b i l i t yWayne miller, general manager of bluescope in southern africa, adds that besides offering the architect an outstanding design option, a steel roof is a sustainable solution. “steel roof coverings are chosen for their appearance, flexibility in design, versatility and strength against the elements, such as withstanding a hail storm,” he says, “but in addition, with today’s advanced technology, certain high sri pre-painted steel roofs can facilitate a much cooler building than before.”

global roofing solutions’ national projects and specifications manager, lyle jeffrey, remarks that thermal efficiency is increasingly associated with steel roofing nowadays with suppliers using thermal technologies in their painting systems. “the big drive behind this is sustainability and with steel being recyclable, it has one of the lowest carbon footprints when it comes to a roof covering,” he says.

“sustainability is increasingly important for green credentials of projects,” highlights stromnes. “and with modern clamps and grips, metal roofing provides the most efficient base onto which to mount solar panels and roof-top fixtures without voiding the roof material warranty.”


ROOf ING & CE I l INGS

“SuSTaINaBILITy IS INcreaSINgLy ImPOrTaNT FOr greeN credeNTIaLS OF PrOjecTS.”

F e at u r e


roof ing & ce i l ingS

co r r e c t r o o f S h e e t S p e c i f i c At i o naccording to jeffrey, before choosing a roof covering, it is necessary to understand the project – the purpose of the facility, its location and the accompanying environmental factors.

“once these have been ascertained, then by process of elimination one can select a suitable material and determine whether to opt for a standard product or the premium version,” he says. “in this regard, the location is highly critical in specifying the appropriate option since it will have a significant impact on the longevity of the roof. For example, a normal coated metal

roof sheet isn’t suitable for projects within a specified distance from the high-water mark. as a rule of thumb, aluminium is recommended for buildings within 400 meters of breaking surf, thereafter the premium coated products ought to be utilized up to 5 km inland.

u n co n t r o l l A b l e e n v i r o n M e n tA l fAc to r Smiller explains that the marine influence is especially severe within 200m from breaking surf, while a moderate influence is pertinent up to 1 000m, after which it is considered benign.

Continues on p46

the blue route mall’s roof is Clean Colorbond™ ultra steel with a Zip-tek profile. Courtesy of bluescope

super 6 fibre cement roof sheeting. Courtesy of marley roofing

Continued From p41


roof ing&ce i l ingS



Research shows that aluminium-zinc (AL-Zn)

coated roof systems can last 60 years and more

ecent research conducted by the metal Construction as-sociation (mCa) of north america confirms that 55% of al-Zn coated steel, standing seam metal roof systems can last at least 60 years. this means that they do not require

replacement during a commercial building’s service life.

this particular al-Zn coating technology is licensed by bieC international, and is sold under various brand names globally. in south africa, the technology is licensed to the safal group for safal steel to make ZinCal® locally. it is also licensed to bluescope to make ZinCalume®.

With over 20 million square metres sold to date, this is the most widely used coating technology in the world.

60 year l ifespan for aluminium-zinC Coated roofing

rolls of ZinCal (55% al-Zn) coated steel.

millennium Village houses built with durable aluminium-zinc coated steel sheets in the “Versatile” profile, in lusaka, Zambia.



the mCa research was conducted in a variety of inland states in the usa, and incorporated multiple field inspections as well as laboratory analyses of metallic corrosion of the roof panels, components and sealants. importantly, it also included assessment of all integral ancillary components that impact the end of a roof’s service life.

the research study concluded that the expected service life of 55% al-Zn coated steel, standing seam roofs constructed today in a wide range of environments, using best practices, can be expected to be in excess of 60 years, well beyond the service life of most buildings.

to download the full report from the safintra group website, go to www.safintra.co.za/roofing-documentsl.html.

the safal group is the sole pan-african licensee to bieC international of the 55% aluminium-zinc coating technology used for ZinCal®, which is sold throughout southern and eastern africa. When it is factory pre-painted, it is sold as Colorplus®.

safal groupsally stromnestel: 011 323 6300 Website: www.safalgroup.com

b e h i n d t h e r e S e A r c h f i n d i n g Sdeciding factors for projected service life were predominantly local climate and the acidity of local precipitation.

the study acknowledges that all roof systems require a regular maintenance programme (at least annually) to clean off debris and to inspect the condition of the roof conduct minor remedial repairs

the study also confirmed that these types of metal roofs resist corrosion even in weak spots, such as sheared edges and profile bends.

While low-slope steel standing seam roof systems were projected to last up to 60 years, ancillary components (such as fasteners) may need to be replaced during the roof life, but this represents significantly less than 20% of the total roof replacement cost, and therefore constitutes standard maintenance rather than replacement.

Colorplus (55% al-Zn sheets, factory colour coated) steel roof sheets being roll-formed at a safal group operation.



www.dezzoroofing.co.za

t e n S t e p S to S p e c i f y M e tA l S h e e t i n g f o r r o o f i n gaccording to stromnes, there are very clear steps in the design and decision-making process which will ensure that an appropriate roof covering specification is arrived at:

1. consider the location (coast/inland). to determ ine the th ickneSS of the corroS ion protect ion coat ing on the BaSe metal .

to determ ine W ind load on the roof.

5. Select a sheet profile. accord ing to roof S lope and Strength/Water carry ing capac it y.

th i S W i l l govern the purl in Spac ingS , and S erv iceaB i l i t y / traff icaB i l i t y of the roof Surface .

8. choose a finish (metalic, or colour coated).

9. If colour-coated, pick a colour.

aeSthet icS i S the pr imary conS iderat ion .

Courtesy of safintra

2. assess the terrain.

3. determine the wind zone (low/med/high/severe).

4. Specify the roof height at the highest point of the building (10m/25m/more).

6. Select a sheet material.accord ing to Serv ice l i f e r equ ir ed. e.g. aluminium or aluminium-zinc coated steel with a coating of 200g/m² is used at the coast as it has an appropriate service life of 20 years.

7. choose a sheet gauge.

Spec i fy the cl add ing SuBStrate , e i ther t imBer or Wood, So that the correct faStener Sp ec i f icat ion can Be included in the deta i l ing .

Fasteners are critical to performance, and one of the most neglected items in roof specifications.

10. Select a purlin / girt material.

he points out that this is one of the uncontrollable environmental factors impacting the performance of steel roofing, which can be minimised by choosing a material appropriate to the conditions under which the steel sheet must perform. others factors that may impact on the corrosive nature of a particular site include prevailing winds, rainfall, time of wetness, temperature, shelter and areas not naturally washed by rainfall.

i n d u S t r i A l Ac t i v i t y A n d h A r S h e n v i r o n M e n t S“in addition, the concentration and nature of industrial activity and the effects of the combustions of fossil fuels must be taken into account in some localities, whilst the direction, intensity and nature of prevailing winds can also exert an influence,” miller states.

For industrial roofing applications, as well as farming sheds and buildings with indoor swimming pools, the internal and/or external environment of the building must be considered, according to miller. “there are many activities carried out in sheds and industrial buildings that are quite severe in their effects on steel products.

Where the roof cladding is subject to heavy dust, emissions, containment fallout or contact with corrosive chemicals, it is essential to consult the roofing supplier for advice on the correct product to use,” he advises.

Continued From p42

The INTerNaL aNd/Or exTerNaL eNvIrONmeNT OF The BuILdINg muST Be cONSIdered.



www.dezzoroofing.co.za

w h At c A n g o w r o n g ?stromnes emphasises the importance of selecting a roof appropriate to the weather and wind conditions of the location and a material that will last the expected service life. “don’t skimp on the material to save 5% at the building stage, as it will cost way more than this to repair or replace in the next ten years,” she advises.

“always remember that a roof is only as durable as it weakest component, so select fasteners, flashings and sealing detailing with the same expected service life as the roof. also specify the installation detailing that makes the roof a fully designed system which will perform for 20 years and more,” stromnes states.

Wilkinson adds that their rheinzink roofs need be installed by skilled zinc crafting contractors. “it doesn’t matter if you’ve got the best roofing material, an incorrectly installed roof will reflect badly on the manufacturer.”

d e S i g n S t h At p u S h b o u n dA r i e SWhen taking on projects outside of the traditional scope, the special design detailing is another factor that needs a closer look as this will play a role in determining a suitable profile, according to jeffrey.

“architects are really pushing conventional products to the edge of their design capabilities with fantastic designs such as vast overhangs and curved roofs,” he says. “however, these designs that challenge the performance of profiled roofing products, together with the changing climate conditions and unpredictable weather events, have led to manufactures upping their game by improving product performance over the last few years.

Full thanks and acknowledgement go to bluescope, global roofing solutions, rheinzink and safintra for the information given to write this article.

advice to avoid pitfalls:

1. Know the climate and environment – using incorrect products can lead to roof failures.

2. incorrect fasteners can shorten the lifespan of the sheet and affect the warranty.

3. ensure that accessories such as flashings match the roofing material.

4. Check the branding on the reverse side to confirm the specified material.

5. always insist on material and fastener warranty.

Courtesy of bluescope

do you prefer a tiled or metal sheeted roof? tweet us @buildingdecor or scan here.



simple, Clever sustainabil itypart 3 : B e St inStall at ion pract ice for inSul ated roofS involveS Spacer SyStemS

etailed installation methodologies for insulated roof spaces are often over-looked at the design stage. as a result, the performance of the insulation may be negative-ly affected during the on-site installation process, and it

may not achieve the prescribed thermal resistance (r-values) as stipulated in the sans 10400Xa standards.

it is of key importance that insulation maintains its full design depth throughout the roof assembly in order for it to achieve its optimum r-value. Compression of insulation compromises the r-value and the thermal performance of the material. it also increases thermal bridging along purlin lines.

c h A l l e n g e S w i t h d i f f e r e n t i n S u l At i o n t y p e SFactors such as cost, aesthetics, thermal performance and combustibility all play a major role in the selection of an appropriate insulation material for a project. Currently, rigid insulation boards and flexible insulation blankets are the two most popular types of insulation used in commercial roof assemblies in south africa.

rigid insulation boards generally cope better under compression, but as their specified

This article is part of a series on metal roofing and cladding systems that promote sustainability.

Continues on p50

a spacer system being installed. Courtesy of mrC group, supplier of the guardian system Warranty.



0

5

25

75

95

100

Trimflute ad Nov 2014

Tuesday, November 11, 2014 3:46:50 PM



depths increase, so do the associated costs, as well as risks associated with long fasteners and system instability.

Flexible blanket insulation installed over purlin will typically be subjected to considerable compression along the purlin lines if the outer weather sheet is not elevated. When installing this type of insulation, suitable spacer systems should be employed to prevent or reduce compression.

there are various spacer systems available in south africa that can broadly be categorised under continuous spacers and mechanical spacers.

co n t i n u o u S S pAc e r S yS t e M SContinuous spacers or packers are available in a number of forms such as timber, Xps or steel. they are secured directly

short fastener lengths used on a spacer system support bar ensure structure stability.

Continued From p48

When installing blanket insulation, a suitable spacer system will prevent or reduce compression along the purlin lines. Courtesy of mrC group, supplier of the guardian system Warranty.



to the purlins in continuous lengths on top of the insulation blanket, which is draped over purlin.

these packers will cause compression at the purlin while allowing the blanket to regain some loft between purlins by elevating the weather sheet. it is necessary to compensate for this loss in overall r-value caused by the compression, by increasing the depth of the specified insulation blanket and packer accordingly (see table).

M e c h A n i c A l S pAc e r S yS t e M Smechanical spacer systems form the backbone of site-assembled roofing systems where warranted thermal performance is required. they eliminate compression of the insulation blanket and take the guesswork out of roof assembly performance.

lightweight structural steel bars, which act as purlins, are mechanically locked into each other to create the lengths required. the bars are supported by brackets, which are available in a variety of heights to accommodate varying blanket thicknesses.

the support brackets create a defined cavity for the insulation material and keep fasteners within safe working

lengths. specific loading requirements are achieved by varying the support bracket centres.

*it is imperative that fastener limitations should be considered when increasing the depths of certain types of packers. professional advice should be sought from a roof sheeting manufacturer and fastener supplier, especially when using packers in conjunction with concealed fix outer weather sheets.

safintra south africatel: 011 323 6300email: [email protected]: www.safintra.co.za and www.safintra.com

Specification Illustrationr-value

achieved (m2.K/W)

135mm glass fibre insulation before installation.

3,375

135mm insulation installed without any packer.

1,772

135mm insulation installed with a 40mm insulated packer.

± 2,835

135mm insulation installed with a 75mm insulated packer.

± 3,000

150mm insulation installed with 75mm insulated packer.*

± 3,273

135mm insulation installed with a 135mm mechanical spacer system.

3,341

p e r f o r M A n c e o f b l A n k e t i n S u l At i o n i n S tA l l e d w i t h d i f f e r e n t S pAc e r S yS t e M S .

this table shows the r-values achieved by a 135mm glass fibre insulation blanket using various spacer and packer options.

branches in south africa: johannesburg, durban, Cape town, nelspruit, polokwane, port elizabeth and bloemfontein.

Further operations: namibia, Zambia, mozambique, malawi, tanzania and east africa.



Palram has been manufacturing a wide range of

semi-finished extruded thermoplastic sheets, panel

systems and finished products since the company

was founded in 1963.

ith local branches in johannesburg and Cape town, palram south africa supports activity across the afri-can continent, including warehouse stocking and sup-ply of palram product ranges comprising polycarbon-

ate, pVC and acrylic sheets and panel systems, as well as finished products for construction, display and other applications.

these product ranges answer a wide variety of architectural requirements to make the most of natural light, withstand harsh climates and corrosion, offer outstanding physical strength and allow freedom in design.

co r r u g At e d S h e e t SsuntuF® corrugated polycarbonate sheets are used for noncorrosive structural roofing and siding due to its high-impact strength and wide service temperature range.

its high light transmission and array of profiles allow it to match any roofing profile and integrate as a high-quality roof light. suntuF® is lightweight, blocks 99,9% of harmful

ultraviolet (uV) rays, and comes in a wide variety of colours and diffusions that

filter light or reduce heat loads.

the suntuF® plus option has

anti- condensation properties, ideal

for greenhouses, garden centres and swimming

pool roofing applications.

f l At S h e e t S With a cellular polycarbonate structure that yields a lightweight sheet with high-impact strength, superior thermal insulation and high light transmission, the sunlite® flat multiwall polycarbonate sheet is ideal for varied roofing, wall cladding and glazing applications. the sunlite® range also includes heat-blocking solarsmart™ sheets that reduce heat build-up and anti-condensation treatment. Combining ultra-high impact resistance with clarity, palsun® can be cold bent and easily formed, making it ideal for barrel vault roofing, skylights, and architectural roofing and glazing. palsun® is virtually unbreakable, yet it is transparent as glass at less than half its weight.

pA n e l S y S t e M San advanced, multiwall, polycarbonate panel system, sunpal® combines proven design, light transmission, thermal insulation and strength. it offers a lightweight, leak-proof design that withstands very high loads and accommodates expansion and contraction. as with any true architectural glazing system, sunpal® is appropriate for a variety of roofing and cladding designs, flat or curved. all palram’s production plants conform to iso 9001 quality assurance and the rohs directive for the restriction of hazardous substance usage. in addition, the company also implements iso 14001 environmental standards.

palramtel: 011 873 1581 / 021 951 8332email: [email protected]: www.palram.co.za

roofing solutions answer arCHiteCtural needs

the hangzhou olympic sports Centre stadium in China features sunpal® panels.



Website: www.palram.com

SUNLITE®

Multilayered polycarbonate sheeting

IdEaL for:

• IndustrIal roofIng & sIdIng

• dIY pergolas and canopIes

• greenhouses & garden centres

• swImmIng pool roofs

SUNTUf®

profIled polYcarbonate sheetIng

IdEaL for:

• IndustrIal roofIng & sIdIng

• dIY pergolas and canopIes

• greenhouses & garden centres

• swImmIng pool roofs

PaLSUN®

flat solId polYcarbonate sheet

IdEaL for:

• barrel vault roofIng

• skYlIghts

• sound barrIers

• lIght boxes

SUNPaL®

multIwall, polYcarbonate panel sYstem

IdEaL for:

• roofIng & claddIng

• flat or curved desIgns

• structures wIth hIgh loads

• archItectural glazIng

all palram’s production plants conform to iso 9001 quality

assurance and the rohs directive for the restriction of

hazardous substance usage. In addition, the company also

implements iso14001 environmental standards.

25

For a

sm

aller carbon footprint – use m

ore roof ights.We’ve got you covered

When qualit y meets commitment

contact us

Tel: 0861 725 726 (Branches in Gauteng and Cape Town)

Email: [email protected] • [email protected]

Tw

enty f ve year warranty



The inclusion of thermal insulation in the roof

system provides a heat transfer barrier to keep heat

in or out as the season demands, and ultimately

facilitates compliance with the National Building

Regulations (NBR).

he nbr, sans 10400 Xa energy efficiency in building, require significant thermal resistance to prevent heat flow through the roof systems of new buildings and al-terations. the aim is to reduce the demand for and use of

electrical energy in heating and cooling buildings, by creating a comfortable interior environment.

i n S u l At i n g i n d i f f e r e n t c l i M At e S“there are many options to facilitate compliance with the nbr, including the installation of an insulated ceiling, such as isoboard thermal insulation,” says mark russell from isoboard.

“an insulated ceiling can follow the roof profile if one wants exposed rafters, or it can be installed as a conventional horizontal ceiling. While the choice remains a personal one, from a thermal insulation point of view it is better to have the insulation further away from occupants in warm conditions, but as close as possible in cool conditions, where it is important to reduce the volume of space when heating,” he explains.

so when building a summer holiday cottage or living in a subtropical area, having the insulation following the roof profile is wise if the aim is to keep the home cool. insulation can be installed either over or between rafters.

if living in cooler climates and in anticipation of having to heat the home frequently in winter, installing insulation as

a ceiling will contain heat within the area for longer, and at a lower cost of generation.

one can also install an insulated ceiling board directly below an existing ceiling structure, rather than removing the original ceiling first. “this is a clean and quick way to add the comfort of insulation, as well as repair a damaged ceiling without the mess of removing the original,” says russell.

h o w M u c h i n S u l At i o n S h o u l d o n e u S e ? according to russell, the thermal resistance required by the nbr is very conservative, which means high levels of insulation if one follows the prescriptive table specific to each climatic zone. in certain circumstances it is possible to combine different insulation products, for instance insulated ceiling board and a thermal blanket insulation product, to achieve the required thermal resistance (r-value) at a reduced overall installation cost.

“Following the rational design methodology, one will likely arrive at a required thermal resistance equivalent to a 40mm thickness isoboard insulated ceiling, sufficient to maintain a home at a comfortable living temperature throughout the year, with minimum temperature control intervention required,” russell states.

“an isoboard ceiling is paintable and highly water-resistant, so it is perfect for kitchens and bathrooms. it is also safe for use and will last for the lifetime of a building without reducing its design performance,” he adds.

isofoam sa (pty) ltd tel: 021 983 1140Website: www.isoboard.com

Ceil ing insulation aids internal Comfort & ComplianCe

an insulated ceiling following the roof profile, with exposed rafters.


aDVERTOR Ial

speCifying a premium produCt for premium results

project name: holdsport ltd

product used: Clean Colorbond®

roof Colour: african White

Cladding Colour: african White, armour grey, shale grey

total m²: 9855m² roof 6360m² cladding

name of architect: bam architects

photograph by: gareth griffiths imaging

Specification for clean cOLOrBONd® steel

0.53mm tCt in Clean Colorbond® steel, metallic coating aZ150 (minimum 150g/m² coating mass), grade g550 (minimum yield strength 550 mpa), super polyester paint system, 25um on topside and 10um on reverse side.

Fasteners to comply with australian standard Class 3 or 4.

Flashing or ridge capping should be manufactured from the same material as used for the roofing.

Specification for ZINcaLume®

0.53mm tCt in ZinCalume® steel resin coated, aZ150 (minimum 150g/m² coating mass), grade 550 (minimum yield strength of 550 mpa).

Fasteners to comply with australian standard Class 3 or 4.

Flashing or ridge capping should be manufactured from the same material as used for the roofing.

M A n u fAc t u r i n g e xc e l l e n c e• trademarked ZinCalume® steel with proprietary surface

treatment and first in producing 55% al-Zn coating technology (1976) with minimum aZ150.

• almost 50 years in producing Colorbond® steel (since 1966)

• bluescope designs its own paint system in conjuction with the paint company (paint systems are propriety to bluescope steel).

• Colorbond® has been sold in south africa since 1998 and is regarded as the premium prepainted product available in south africa.

• the only manufacturer (since 1996) complying to australian std (as); malaysian std (ms),

• sabs approved.

There IS SImPLy NO SImILar Or equIvaLeNT PrOducT TO ZINcaLume® Or cLeaN cOLOrBONd®


aDVERTOR Ial

r e S e A r c h A n d d e v e lo p M e n t• Continue to develop and improve product performance via

bluescope research (bsr) and collaboration with others research institutional / universities.

• at any given time bluescope has 18000 samples on outdoor exposure sites all over the world, which are then brought back on an annual basis for assessment.

• provide technical support / literature (see website for data sheets, fact files, corrosion bullitens etc.

p r o d u c t c e r t i f i c At i o n A n d t r Ac e A b i l i t y• assurance of our commitment to quality by sirim and sabs

product certification scheme.

• Contain branding text at reverse side for product identification and traceability.

Warranty – We offer a product/material warranty on a project to project basis.

Preferred by many roll forming operators – due to the consistent tensile strength/thickness and superior paint coating.

t h e b lu e S co p e d i f f e r e n c e

Thermatech™ (designed by BlueScope) - thermatech™ solar reflectance technology is incorporated in Clean Colorbond® steel to lower surface temperature by absorbing less heat from the sun. in other words thermatech™ is able to reflect the solar heat off roofing material.

• thermatech™ solar reflectance technology – reduces roof surface temperature by up to 6°C

• reduce annual cooling energy consumption by up to 15%

For example, the SrI value for colour Off White is 85

clean Technology (designed by BlueScope) - thermal comfort is maintained by the dirt resistance properties in Clean Colorbond® steel. the solar reflectance of the roof sheeting will be influenced by the amount of dirt staining, therefore retaining a clean appearance is very important for maximizing the cooling effect of roofing sheets.

ZINcaLume® base - the coating on ZinCalume® steel comprises 55% aluminum, 43.5% zinc and 1.5% silicon. it has excellent corrosion performance, which out performs galvanized Z275 material by up to 4 times in the same environment.

Super Polyester Paint System and Superior Primer Technology (designed by BlueScope) - proven paint durability performance against natural weathering (color fading / chalking / flaking / dirt staining).

For product identification and originality, please check the reverse side of the coil for the following branding text.

bluescope steel southern africa (pty) ltd

tel: +27 21 442 5420email: [email protected]: www.bluescope.co.za

c l e a n co lo r b o n d ® w i t h t h e r m a t e c h ™ this is a high-performance, pre-painted steel developed by bluescope, comprising multi-layers of coatings and offering high levels of corrosion resistance, excellence in colour performance and resistance to tropical staining.

quick facts:

• bluescope ownes the 55%al-Zn metallic coating technology.

• ZinCalume® steel was developed in association with bethlehem steel in america and refined by australian technologists at the port Kembla research laboratories. this product brand is a registered trade mark of bluescope limited.

SPecIFy ZINcaLume® Or cLeaN cOLOrBONd® aNd dO NOT SeTTLe FOr aNyThINg LeSS.

Clean COLORBOND® steel made by BlueScope G550 AZ150 0.53TCT 16:18 01:APR:13 11



F e at u r e

Clay and ConCrete roof tiles

a tRied and tRusted option

The clay roof tile is one of the oldest roofing materials invented by

men to protect buildings from the elements – one that stood the test

of time and still exists today.

his is according to isaac simelane, architectural and specification manager at marley south africa, who points out that a properly built and maintained clay roof can last over 100 years.

A d vA n c e d A n d r e f i n e dyet, according to simelane, clay roof tiles produced today are very different from what they were 50 years ago, both technically and aesthetically. “over the last two decades we have seen a huge technical leap in terms of production methods. the new clay composition produces tiles that are more resistant and long-lasting. Water absorption was reduced significantly to values as low as 3%, which means that they can be used under the most severe conditions without the risk of losing their technical capacity,” he explains.

“in addition, many new accessories, colours and finishes have been developed, allowing versatile designs in virtually any shape and form imaginable,” he says.

M o r e t h A n j u S t o n e lo o kWillem grové, marketing manager at monier Coverland, highlights that since the traditional, standard double-roman profile tile makes up the bulk of the market for concrete tiles, it is easy to forget about other profiles available. “one can really make a building stand out by just opting for a different tile profile. We are seeing concrete tiles used on mono-pitched roofs and flat tiles are especially trendy at the moment to achieve a modern look,” he states.

the added option of pre-coated tiles also gives a deeper, richer colour on the roof than traditional roof tiles that are a bit softer in colour. “and while colours may weather and fade over time, since the body colour of the tiles is the same as the surface colour, weathering happens in a uniform way,” grové says.

A n e At f i n i S haccording to grové, to prevent damage to the ridge line of a roof, which can sometimes crack and result in leaks, a dry-ridging technique that has been used for tiled roofs in europe for many years is now gaining ground in south africa. Continues on p62



Insulate to enhance your buildingThermally & AcousticallyGranric MBI (metal building insulation) is manufactured from high quality, non-combustible, flexible Glasswool insulation with an inert binder, which makes the product lightweight, safe and resilient. It is faced on the one side with either a reinforced silver foil or white metalized foil. Granric Insulation manufactures and distributes thermal & acoustical insulation. With vast experience, offers advice on SANS 10400, building physics and acoustics.

Quality thermal insulation

Springs office: Grant Richardson • Tel: +27 (11) 817 2290 • E-mail: [email protected]

Cape Town office: Almeri de Vries • Tel: +27 (21) 612 0225 • E-mail: [email protected]

www.granric.co.za

MBI Acoustic Liner FRK Duct Insulation Flexi Wool

Fire properties - SANS 428 classification • Class A (non-combustible) / A1 (no flame spread) /1 (no limitations)



“the ventilating ridge system involves a sealing compound that is simply rolled and stuck over a ridge baton and onto the tiles at the ridge line. the ridge tiles are then secured to this baton. the result is a clean-looking ridge line which is protected against leaks, wind and dust, providing a long-term benefit,” grové explains. although the initial setup costs of mortar application may be low, it’s short life-span, particularly in harsh weather conditions, urges homeowners to explore more innovative, sustainable ridge and hip-line solutions.

S u i t e d f o r d i v e r S e c l i M At e SConcrete tiles are strong and hardy. independent hail impact tests conducted by the sans have indicated that a hailstone diameter of between 40-50mm and larger is necessary to damage standard Coverland concrete roof tiles, according to grové. “in the event of an extraordinarily large hail storm, it is much easier to fix one or two tiles than replacing larger roofing sheets,” he states.

the ability of a hailstone to cause damage is directly proportional to its energy on impact and this in turn increases with the diameter of the hailstone. in brief a large hailstone is potentially a greater hazard than a small hailstone. the majority of hailstones studied have a density of 910 kg/m3 indicating virtually clear ice. the shapes of hailstones are varied and although these have a limited effect on the damage potential it is negligible compared with the overall effect of the hailstone diameter, i.e. terminal velocity versus impact energy.

other conditions listed by simelane, which can be very harsh on a roof, are coastal areas with high salinity, frost and severe wind. “in the vastness of the south african territory one is bound to find the most different conditions, which will condition the choice of a roofing solution and clay roofing that is suitable for all weather and environmental conditions that one may find,” he says.

“although the purchasing price may be slightly higher than other roofing options, the maintenance cost is almost irrelevant and when considering that this solution can last a lifetime, it becomes by far the cheapest roofing solution available.”

S u S tA i n A b i l i t ysimelane further points out that clay roof tiles have one of the lowest environmental footprints when comparing roofing solutions. “in terms of production, clay exists naturally and doesn’t require much processing. on the other hand, because of its durability, the amount of waste produced due to roof replacements is insignificant,” he states.

“a ventilated clay tile roof allows energy savings as well. Concerning roofing materials, clay is one of the lowest

conductors of temperature, and by allowing the air to circulate beneath the tiles a natural thermal insulation is achieved. this reduces the cost on roof insulation materials and creates a more stable temperature indoors without the need of artificial cooling or heating systems.

“being one of the most ancient products still in use, clay roof tiles are one of the most high-tech and efficient ways to protect buildings over their lifetime,” simelane concludes.

Full thanks and acknowledgement go to marley roofing and monier Coverland for the information given to write the article.

a dry ridging technique ensures a neat finish. Courtesy of monier Coverland

Clay tiles are still a popular roofing material choice. photo courtesy of marley roofing.

Clay roof tiles. photo courtesy of marley roofing.

Continued From p60



The new Multichoice head office building in

Randburg has been completed and with its

state-of-the-art design and imposing roof,

this four-storey building is hard to miss on the

corner of Republic and Bram Fisher Roads.

ix years ago, glh architects started to design this con-temporary new headquarters for multichoice – a building that would be completely different from the old campus and which could accommodate all their employees in

one space.

For the roof, global roofing solutions’ Klip-lok 700 and brownbuilt concealed-fix profiles were specified, and applied in an inventive way to create a big canopy on the western side of the building and a cladded look for the underslung portion.

“the roof design is quite unique,” comments lyle jeffery, global roofing solutions’ projects and specifications team

a multifaCeted roof for multiCHoiCe City

picture: an aerial view of multichoice City – a big landmark in randburg. Courtesy of glh architects



national manager. “While installing the Klip-lok 700 for the main portion of the roof was pretty straightforward, we got involved in planning the details for the brownbuilt underslung with regards to how the sheeting would be fixed and flashed. this was quite a difficult flashing since it was curved, so we worked with the roofing erector to work out how to best tie in the roof,” he explains.

b r o w n b u i lt i n S tA l l e d A S S o f f i t “the benefit of the brownbuilt roofing profile, and the reason for it being specified for this project, is that it is able to serve a dual purpose in the sense that it can be used for roofing as well as a ceiling or soffit sheet. and for multichoice City, a specific detail was required for the underslung,” adds jeffery.

the brownbuilt profile was installed with the rib facing up and a special h9 clip was used to install the sheeting under the purlin, rather than the traditional way of over purlin. this h9 clip allows brownbuilt to hang from the purlin with the underside of the profile being visible.

Wishbone sanyika, associate and architectural technologist at glh architects, says the brownbuilt profile complements the horizontal lines that are prevalent on the building and provided the look and effect that they wanted to achieve.

“installing the brownbuilt sheets the way it has been done beneath the roof, one can hardly see that it is a roof sheet. it looks like a cladding material, so it works very well. other types of cladding would also have cost a lot more, for the same effect,” he says.

w e S t e r n o v e r h A n gWith the building orientated west, due to the site location, a big consideration of the design was to control light glare and heat from the sun hitting the impressive bean-like glass facade on the front of the building.

“the steel roof creates a big overhang, kind of like a cap, to provide shade over the western facade and reduce glare into the building in order to minimise the required use of artificial cooling,” explains sanyika.

“the canopy cantilevers for about 8m, but in total the roof sheeting spans about 12m to 13m in order to create the overhang. therefore a roofing sheet that could span a great length was required. other than providing the required profile, Klip-lok 700 enables great spans and it seems like it was the right product for the building,” sanyika states.

g r e e n r At i n gthe building has achieved a five-star green star sa design rating and is currently being considered for an as built certification by the green building Council of south africa (gbCsa).

multichoice City is also one of four global roofing solutions projects entered into the steel awards this year.

global roofing solutionstel: 011 898 2900email: [email protected]: www.globalroofs.co.za

In brief:

project: multichoice City

location: randburg, johannesburg

Completed: 2015

rating: Five-star green star sa office design V1

roof profiles: Klip-lok 700 steel roof, brownbuilt underslung


Advertor iAl

“ aamsa has been the administrator since 1999 and we are grateful for the services provided over the past 16 years,” des schnetler, tiasa’s chairperson, notes. “however, times have

changed and the markets have evolved rapidly, with diverging opportunities and challenges.”

A b o u t t h e co M pA n i e Saaamsa, the registered entity, will continue to move forward with their current activities as the trusted and reliable source in the glass and aluminium industry and other group interests.

tipsasa will focus on the thermal insulation industry with particular emphasis on energy-efficient products and systems. as a non-profit company, it will continue to serve its members, professionals and consumers.

r At i o n A l e f o r t h e S e pA r At i o ntiasa’s board of directors made the decision to become a legal entity in its own right, hence the registration of tipsasa as a non-profit company. over the past six months tipsasa has implemented a common operating model, streamlined its cost structure, improved its go-to-market performance and brought in proven leadership.

on the commercial side, members seek partners with a deep understanding of their business who can help lead with their transformations. in the public sector, energy demands are increasing and clients want providers with specific experience in energy-focused innovation.

by separating, each association will focus on their respective categories, as well as the focus to meet unique customer needs and market requirements. the two associations have different growth profiles and cash-flow dynamics. the separation will allow both entities to better optimise their capital strategies and cost structures, and will provide members with distinct development opportunities. the market has become highly competitive. as two independent, focused and market-leading organisations, each association will be better positioned to serve its industry.

based on these factors, tiasa’s board of directors believes that the next phase will be the growth of the industry, which will be enhanced by training and customer focus. “We expect this change to enable both associations to enhance innovation and improve delivery, in ways that are consistent with the rate and pace of the markets they serve,” says schnetler.

M o v i n g f o r wA r d“the progress we’ve made, coupled with the changing demands of the market, make this a good time to give these

two businesses room to thrive as independent companies and enable them to move decisively to capture the opportunities in front of them,” schnetler states.

l e A d e r S h i pthe current board members of tiasa, the stalwarts of the thermal insulation industry in south africa, will serve as the new directors of tipsasa. they are lisa reynolds (saint-gobain), alf peyper (insulation Convertors and distributors), lammie de beer (technopol sa), gary rowley (Vedder & moffat), grant richardson (granric insulation) and gary sweeney (spunchem international).

des schnetler and grant richardson have been re-elected as chairperson and vice-chairman of tiasa respectively and will also serve in this capacity at tipsasa.

i n d u S t r y - l e A d i n g pA r t n e r S h i p S tipsasa will be affiliated with the southern african association for energy efficiency (saee). With south africa experiencing critical energy constraints, it is time to take personal action to save electricity and achieve a more energy-efficient south africa.

the energy-efficiency regulations were promulgated in september 2011, and are applicable to new buildings and extensions. “We should now concentrate on existing building stock by retrofitting (adding insulation on top of the ceilings). in many existing buildings, the roof and ceiling are often not insulated properly or not insulated at all. many people fail to realise that a building system can have a huge impact on a building’s energy efficiency. the building envelope plays a critical role, as it forms the barrier between a building’s interior and exterior environments. a well-insulated and/or well-designed building will provide year-round comfort, cutting cooling and heating costs and reducing greenhouse emissions,” schnetler explains.

the affiliation with saee is in line with tipsasa’s vision of answering the broader energy-efficiency and conservation needs for south africa.

For more information, contact tipsasa on 0861 000 334 or 082 305 8559 (mobile) or e-mail [email protected].

please note that this article was written and supplied by tipsasa.

time to say goodbyeA majority vote from the members of the Thermal Insulation Association of Southern

Africa (TIASA) to become independent from the Association of Architectural Aluminium

Manufacturers of South Africa (AAAMSA) Group has led to the establishment of a new

legal entity, the Thermal Insulation Products and Systems Association SA (TIPSASA).


Advertor iAl



esigned by the late world-renowned japanese architect Kisho Kurokawa and commissioned by garbers & james after his death, the 302m² building was inspired by the cosmic whirlpool shape of the milky Way. according to Ku-

rokawa, the design concept was meant to be “a strong symbol of life, with everlasting forces swirling around a centre”.

patients and guests are welcomed in the central core of the building, from where the galaxy-shaped structure swirls outward, leading visitors from the one end of the outstretched building to the other.

the 400m² zinc roof structure comprises rheinzink’s double-standing seam profile system. the curved outlines mirror the surrounding contours, while the zinc wings link to the central core of the building. meant to be calm and welcoming,

this area is softly lit by natural light allowed in through a skylight at the peak of the elliptical roof.

“This unique geometric roof illustrates the versatility of what skilled craftsman can create using our Rheinzink material. Being a crafted roof it shows how architects can use their design initiative extensively,” Stephen Wilkinson, business manager at Rheinzink South Africa, points out.

in addition to enabling unique designs, zinc is a natural and 100% recyclable material ensuring longevity and sustainability. over time, the zinc will also patinate and change its appearance as it weathers and ages, reinforcing the symbolism of life for which the centre stands.

rheinzinktel: 021 671 2600email: [email protected]

swirl ing zinC roof realises design vis ionThe swirling roof of the Maggie’s Swansea Cancer Care Centre on the grounds of Singleton Hospital in Wales

was carefully designed and crafted out of Rheinzink, a metal roofing material made from titanium zinc.

the roof was crafted using rheinzink’s double-standing seam system.

the maggie’s swansea Cancer Care Centre.

the elliptical roof features a skylight at the apex.



“ or prestigious buildings, reception areas or gener-al office areas, we have the ceiling system to suit,” says barry gould, managing director at Capco.

“not only are our suspended ceilings aesthetically pleasing, but they also meet performance requirements such as structural fire protection, moisture resistance and acoustic performance.”

a suspended ceiling makes the difference between creating an environment of well-being and purpose, as opposed to merely having an environment within the shell of a building.

“your environment needs to have thermal qualities, it requires sound attenuation and absorption, as well as the ability to deliver the right ambient light it needs,” gould explains. “the ceiling needs to be integral to services such as lighting, sprinklers, sound systems, air-conditioning, fire and security.

it adds the aesthetics to the environment, and hides the multitude of mechanical and electrical ‘sins’, yet must also provide total accessibility.

“Capco has the knowledge, experience and ability to achieve client requirements and exceed expectations, whatever the size, scope or location of any project,” he adds.

Capco stocks a comprehensive range of ceiling systems sourced from quality international and local manufacturers, with unique designer trims that allow architects, designers and contractors to create distinctive individual ceiling designs that add aesthetic value to an area. its drywall partitions offer luxurious appeal with a wide range of partition components to suit all needs.

Furthermore, its beta drywall aluminium sections are a unique combination of the best construction ideas and aesthetics from the international drywall industry. the patented result is a highly functional, easy-to-install and good-looking system that caters for all types of installations.

“With so many aspects to consider when it comes to drywalls nowadays, such as fire integrity, acoustic ability, impact resistance, moisture resistance, thermal rating, maximum height issues, curved walls, tape and joint or skim, and more, it is enough to make you go dizzy,” says gould. “therefore it is important to talk to experts like Capco, who has a wealth of experience in all the aforementioned.”

CapcoKzn: 031 569 6090 • jhb: 011 822 8142Website: www.capco.co.za

Ceil ings tHat add value

overport City shopping centre.

Capco stocks and manufactures all types of ceilings

and partitions, including suspended ceilings,

ceiling suspension systems, drywall partitions

and office partitions. The company’s experience,

expertise and efficient approach have ensured that

they have become an established and trusted name

in the ceiling and partition industry.

IT addS The aeSTheTIcS TO The eNvIrONmeNT, aNd hIdeS The muLTITude OF mechaNIcaL aNd eLecTrIcaL ‘SINS’.

King shaka international airport.



he rich colours available in safal steel’s optima plus® dou-ble-coat paint system range are inspired by the vibrant colours typically associated with africa, and add vitality to any building project for use in benign corrosive environ-

ments.

optima plus® is produced by a unique process whereby rolled steel is continuously hot-dipped into a patented alloy of 55% aluminium, 43,5% zinc and 1,5% silicon.

this patented alloy coating protects the steel in two ways. First of all, the aluminium component of the coating provides a tough physical barrier between the external atmospheric conditions and the inner core of steel. secondly, the zinc in the coating sacrifices itself to protect the steel at cut edges.

the optima plus® painted steel product offers excellent value for money as well as top quality. the double-coat paint system is warranted for up to five years subject to environmental conditions detailed in safal steel’s warranty document.

safal steeltel: 031 782 5500Website: www.safalsteel.co.za

a new generation of affordable Colour-Coated steelA steel roof doesn’t have to look just like any other steel roof. With today’s available technology, coloured

steel roofs broaden the range of building designs and looks that can be achieved.

alloy coating weight aZ100

total coated thickness dimensions 0,3mm, 0,35mm, 0,40mm

Width range 925mm and 1 220mm

Colour range 10 vibrant colours

paint film top coat ± 14µm

primer ± 5µm

back coat ± 7µm

t e c h n i c A l S p e c i f i c At i o n S :ThIS PaTeNTed aLLOy cOaTINg PrOTecTS The STeeL IN T WO WayS.

Colour-coated steel roofs.



mall kept cool W ith qual i t y inSul at ionalutherm® insulation proved to be the ideal solution to facilitate a comfortable operational environment inside the 15 016m² Zebediela plaza in limpopo, where 11 816m² of 135mm alutherm® was installed.

manufactured by africa thermal insulations (ati), alutherm® is a flexible, heavy-duty bulk insulation material consisting of a fibreglass blanket laminated to a 4mm white bubble layer on one side and a reflective foil layer on the other side.

nolene van den heever, divisional sales director at ati, points out that alutherm® has excellent fire retardant properties. “the product is tested in accordance with sans 428 – fire performance classification of thermal insulated building envelope systems,” she states.

A g o o d co M M e r c i A l f i t“it is a quality product with good thermal values that can be installed as a single layer,” says hannelie smit from polygon architects. “When specifying insulation for shopping centres that have grid ceilings, you need a product that can be installed under the roof sheeting without a second component above ceiling as the ceiling void has to be accessible,” she explains.

“on top of that, ati’s service is fantastic. We never have problems with stock availability and deliveries are on time. especially for commercial projects, construction deadlines are critical because you work towards opening dates,” smit adds.

S pAc e r S yS t e M i n S tA l l e droofing contractor, select projects, installed a spacer system between the purlins to accommodate the 135mm alutherm®. “We used spacers to minimise the compression of the insulation material and create a hard, flat surface on which we could attach the clips of the roof sheeting,” says ben pretorius from select projects.

select projects recently celebrated 21 years of existence.

atitel: 011 462 9122Website: www.alububble.co.za

Zebediela plaza.


technical Solut ionS & proJectS

ntrusted with the revamp of the facade of this well-known landmark, hunter douglas was involved from the initial phase of the project.

together with the architect, they were briefed by the client to upgrade and modernise the building’s facade through the application of effective and functional materials.

hunter douglas was appointed to design, supply and fit type 70s aluminium louvres, portholes and signage panels. a total of 591m² of louvres in a basalt grey finish were installed during the project.

S u n co n t r o l A n d A e S t h e t i c f u n c t i o nthe louvres were fitted in a vertical position at a module of 85mm, and a series of portholes were introduced and positioned in order to achieve the desired aesthetics.

performing a dual role, these louvres serve as a sun-control screen, while at the same time providing aesthetic appeal. in addition, the aluminium signage panels were strategically placed to be used as advertisements for the occupants.

as a mixed-use facility, the building houses many tenants. despite the challenge of not interfering with the day-to-day business of these occupants, the project was successfully completed within the desired timeframe.

hunter douglas south africa tel: 011 251 7000Website: www.hunterdouglas.co.za

modern faCade revives illovo JunCtionSituated at one of the busiest intersections in Johannesburg, on the corner of Corlett Drive and Oxford Road,

Illovo Junction is looking hip and stylish after having received a recent facelift. The property upgrade was

completed in March 2015.

Project team:

architect: dudley van Wyk architects

Contractor: readam

the facade of illovo junction consists of aluminium louvres, portholes and signage panels, designed, supplied and installed by hunter douglas.


technicalSolut ionS&proJectS

a irportS to Be Bu i lt in afr icathe number of airport infrastructure projects in sub-saharan africa has increased significantly over recent months, according to africa project access.

the consultancy has detected 25 new greenfields and brownfields airport projects for sub-saharan africa, outside south africa, in the period from january to august this year.

“in 2013, the larger airports in sub-saharan africa (over one million passengers per annum) handled approximately 56 million passengers. although about half of this total was for south african airports, there has been a sharp rise in passenger and cargo handling at airports outside south africa,” says paul runge, managing director of africa project access.

in addition, the african airlines association indicates that the total global freight carried by african airlines has increased substantially and is nearing the one billion ton mark.

New projects:

• planned greenfield projects: 9.

• expansion, brownfields projects (airport infrastructure and linked commercial property development): 16.

These relate to:

• major international airports: 9.

• smaller and regional airports: 16.

52% gRow th putS WallS&roofS top in itS categoryWalls & rooFs is now the top-read publication in the architecture category of business-to-business magazines audited by south africa’s audit bureau of Circulations (abC). the total number of confirmed subscriptions currently stands at 11 365.

the magazine’s subscriptions have grown by an astonishing 52% from a monthly average of 7 471 over the second half of 2014, to the total monthly circulation of 11 365 in the period from january to june 2015. this is an increase of 3 891 subscriptions.

“We are continuously looking at ways to matter more to people in the industry,” comments the editor and business unit manager of Walls & rooFs, marlene van rooyen. “this extraordinary growth over the past six months confirms that the magazine is succeeding in bringing key information to architects, designers, specifiers and other trade professionals, a key objective that we stay committed to.”

“this interesting development is multi-focused and pertains to new planned international airports, expansion and rehabilitation of existing airports and a new focus on regional and provincial airports,” states runge. “airports are being converted into commercial hubs, including retail outlets and hotels. the aeroropolis project connected to or tambo international airport is a good example,” he illustrates.

africa project accesstel: 011 564 67700Website: www.africaprojectaccess.co.za

VOL 16.4 June 2015 R38 incl. VAT

FOR The inFORmed ARchiTecT

• 15 ideas for housing • Retail trends influence design • 3D modelling & BIM technologies

ZInc claDDIng foR scallopeD facaDe



prayed on, it gives im-mediate waterproofing of structures below ground, for example the outside of

foundations and retaining walls, as well as on practically any horizontal and vertical surfaces that are not exposed to ultravio-let (uV) light. it is suitable for all types of concrete and cellular concrete surfaces, limestone, pumice, lightweight brick and breeze-block masonry, render and screeds.

S p r Ay e d - o n M e M b r A n eplastimul 2K reactive is applied using an airless spray device that keeps the product’s two components separate until they emerge from the spray nozzle, after which they blend and immediately begin to set.

this forms a partially hardened membrane, which is highly flexible, waterproof and resistant to leaching. the tough, fully-cured membrane has a high elasticity and crack-bridging capacity, and prevents the ingress of water even at high positive pressures.

u S e r - A n d e n v i r o n M e n tA l ly f r i e n d lyplastimul 2K reactive has been developed by the international mapei group, a producer of adhesives, sealants and chemical products for construction.

a primary concern of mapei in developing its products is the health and safety of users as well as care for the environment. being solvent-free, plastimul 2K reactive is non-flammable and eco-compatible. in addition, user-friendly acrylic paint systems can be used for over-coating.

co n c r e t e r o o fS – d e A l i n g w i t h u vin applications such as the sealing or refurbishment of concrete roofs, which inevitably are exposed to uV sunlight, the plastimul 2K reactive membrane can still be applied and protected from the uV with a suitable reflective finish such as two coats of mapei aquaflex roof hr reflective paint.

lo c A l A p p l i c At i o n A n d g uA r A n t e estill a unique product in south africa, plastimul 2K reactive has attracted the attention of local waterproofing contractors. this bitumen waterproofing emulsion is proving to be a particularly well-received solution for waterproofing retaining walls and concrete roofs that frequently present challenges for traditional waterproofing systems.

if a project is undertaken by a mapei south africa approved applicator, the waterproofing membrane is guaranteed against deterioration for ten years and a full quality control system is provided free of charge by mapei south africa’s technical personnel.

mapei south africatel: 011 552 8476Website: www.mapei.co.za

fast-reaCtive emulsion waterproofs instantly

Mapei South Africa has added another technology

innovation to its comprehensive range of waterproofing

solutions. Plastimul 2K Reactive is a solvent-free,

eco-compatible, bitumen waterproofing emulsion that

provides instantaneous cover.

plastimul 2K reactive is applied by airless spray.

plastimul 2K reactive.


Advertor iAlCONCEPTS & V IS IONSaDVERTOR Ial

awnings to spruCe up outdoor areas

wnings are not just decorative additions to buildings. While they are aesthetically pleasing and can make a venue stand out from the rest, they also provide prac-tical sun protection and block out harmful ultraviolet

(uV) rays, which in turn assists in optimising energy use inside buildings.

aluglass bautech’s solamark range of fixed and retractable fabric awnings provides a wide range of solutions to extend or enclose outdoor areas, and can be custom-made per project.

With spring in the air, it is time to open up windows and doors to let in the freshness of

the season as well as make the most of patios, decks and outdoor areas at restaurants,

hotels and shopping centres.

Fixed flat screens at the entrance of a Woolworths Food outlet.

M oto r i S e d Aw n i n g SWhen looking to install large awnings for shops, restaurants or office buildings, it is wise to opt for motorised retractable awnings that can be opened or closed at the touch of a button.

the solamark motorised models are operated with an electric motor controlled by a switch or remote, or alternatively by sun and wind sensors. these retractable awnings can also be linked to a building automation system.

Fixed awnings at Bedford Square.


Advertor iAl

85

Aluglass Bautech (Pty) Limited

Tel: 011 451 8400

0861-ALUGLASS (0861–258 452)

E-mail: [email protected]

Website: www.aluglass.co.za

Retractable drop screens at the Village View Shopping Centre.

Flat screens at News Cafe.

A drop arm awning at the Village View Shopping Centre.

f i x e d Aw n i n g Salternatively, some building designs may call for a permanent fixture that does not need to be adjusted. the fixed options in the solamark range come in various shapes and sizes, including the pram, bow, wedge and dome shapes, as well as flat screens.

both the retractable and fixed awnings can be installed against walls, under slabs and to roof trusses.

f i n i S h e SFold-arm aluminium frames are available in white or light grey powder coatings, but can be coated in any colour on request. Fixed awnings frames are supplied in mill-finish aluminium or, if specially requested, any powder coating.

fA b r i c Sthe solamark range is made from acrylic fabrics that have been impregnated with teFlon®, which creates a barrier effect that reinforces water repellence and resistance to atmospheric pollution, and delays the adherence of soil onto the fabric. however, they remain permeable to air. With a high resistance to light, the fabric also disperses, absorbs and reflects uV rays.

aLugLaSS BauTech eNgINeerINg quIeT SINce 1973!

in addition, the tenara thread used for stitching is a long-lasting thread which further enhances the life of the outdoor products it is used for.

the fabric is available in an extensive range of colours and patterns with unsurpassable colour stability and maximum resistance to shrinking, tearing and stretching.



batHroom designit ’s in tHe detailsA bathroom is typically envisioned as an oasis

of well-being, a place where one can relax and

unwind. Colours, light and furnishings give a

room its face, however, it is the details that give it

character. Detailed solutions from Viega focus on

enabling seamless architectural designs with the

highest levels of comfort.

p r e wA l l S y S t e M Ssystems for flexible and creative bathroom design is made easier with the Viega steptec pre wall structure. this solution is the best the market has to offer in terms creating individual or barrier free pre wall and separating structures whether half height, full height or free standing. steptec is the optimum installation solution regardless of where you sanitary facilities are located

o n - t r e n d b At h t u b f i t t i n g SWith increasingly narrow bathtub rims being on trend, Viega’s multiplex trio functional unit has been developed with an installation depth of just 33mm. this extra-flat design combines the inlet, drainage and overflow fittings and makes installation simple.

introducing electronic controls into the bathroom, the multiplex trio e allows fully automated bathtub filling. operating elements can control water inlet volume and temperature selection, switchover to hand shower as well as a user menu displaying all functions available.

tA i lo r - M A d e S h o w e r d r A i n Ag e barrier-free baths and floor level showers demand efficient drainage systems. Viega advantix is a clever modular system with a drainage capacity of up to 1,1l/s, while the advantix Vario shower channel and wall drains offer a drainage capacity from 0,4l/s to 2,4l/s.

allowing complete individuality in design, advantix Vario shower channels can be cut to length with millimetre precision and can be fitted in a straight line or around corners, or directly along the wall. With a low installation depth of only 25mm, it can be fitted in any solid or lightweight construction wall.

available in four colour variations, matt and polished stainless steel, black and white, advantix Vario shower channels integrate into any bathroom design.

the standard shower channels are available in lengths of 750 to 1 200mm and have a minimum construction height of just 90mm. grate finishes vary from stainless steel, tileable insert or glass.

p r Ac t i c A l , S t y l i S h f lu S h S yS t e M SViega’s Visign actuating panels for toilet and urinal flushing are produced from high-grade plastic, glass and stainless steel, with a variety of finishes to suit any bathroom design. the

touch-less option offers the advantages of a hygienic, low-maintenance surface.

With the exception of the round-cornered designs, all actuating panels of the Visign for more and Visign for style ranges can be installed absolutely flush with the wall, with only the push buttons standing out. the installation frame can be adjusted effortlessly to different tile thicknesses.

Viega is committed to the preservation of drinking water and its products carry the Water efficiency label.

Viegatel: 083 645 0059email: [email protected]: www.viega.com

the advantix Vario shower channel in a double shower.

Flush panel for toilets and urinals.



Viega South Afr ica

Plumbing and heat ing systems

Harscan Distributors55 Hill Street, Ferndale, Randburg, GautengTel: 011 787 2993 • www.harscan.co.za • www.viega.com • [email protected]

Advantix Roof and Balcony drains from Viega. Available in diameters of 50mm, 75mm and 110mm with a maximum drainage capacity of 4,5 L/s.

Advant ix Inser t Drain from Viega. With a mult iple l ip seal the drain is able to pushed into an exist ing 110mm pipe end.


city chat

Three major office developments currently under

construction in Kenya and Botswana will each soon

boast an intelligent ‘brise-soleil’ facade designed

by GAPP architects / urban designers (GAPP),

specifically to make the most of the African sunlight

without the drawback of heat gain.

he facades involve either a glazed envelope or cavity wall, together with a secondary veil designed to block direct sun, but at the same time let diffused or reflected light into the building, according to simon bird, senior associ-

ate at gapp.

“therefore one still gets the maximum benefit of natural light, which helps to reduce internal lighting costs, while the building cooling costs are reduced since the facade prevents heat gain to a great extent during periods of intense solar exposure,” he states.

b r i tA M to w e r , n A i r o b i , k e n yAa 30-storey tower office block of about 30 000m², britam tower, is envisioned as an iconic prism-shaped, high-rise development in the city centre of nairobi.

the building’s full-height glazed curtain wall facade will be screened by a veil made out of hollow ceramic rods that are horizontally laid. these 1,5m long, 50mm x 50mm rods are spaced varyingly across the high-rise, depending on orientation, to effectively reflect light into the building without the heat.

M A S h i A r A pA r k , n A i r o b i , k e n yAanother office development in Kenya, mashiara park, will display a facade based on the same principle but interpreted differently in terms of the exterior details.

instead of ceramic rods, metal louvres will be applied as a sun filter. on the northern and southern facades, overhangs and sun shadings will provide sun protection, while the eastern and western louvres will receive perforated, electrically operated vertical fins which can be closed completely, blocking out the sun while letting through filtered light.

intell igent faCades to direCt tHe afriCan sun

an exterior perspective of britam tower.

a sample mock-up of the facade for britam tower, built by prime aluminium industries, based in dubai.

a close-up of the mashiara park facade.


city chat

b u r S h e A d o f f i c e , g A b o r o n e , b ot S wA n A the new headquarters of the botswana unified revenue service (burs) is a square block of four buildings built around a landscaped courtyard, which mimics and use the ecological closed-cycle principles of the okavango delta.

the facade for the burs building will also comprise 1,8m long, 50mm x 50mm rods on its outer skin such as britam tower, but in this instance the rods will be laid vertically with deeper protective overhangs to deal with heat gain on the northern facade. another variance on the concept is that instead of the glazed curtain walling, the burs building features a brick cavity wall with punctuations of windows to improve the building’s thermal capacity and reduce cost.

in addition, to counter noise from a railway line that runs past the development, a special type of acoustic build-up will be added to the facade. some parts of the facade will comprise two layers of glazing with a 200mm cavity in-between.

applying the same principle, with slight variations, each facade will intelligently manage natural daylight, heat gain and acoustics.

gapp architects / urban designerstel: 011 482 1648Website: www.gapp.net

the exterior of mashiara park.

Construction on the courtyard for the burs project in botswane.

an artist’s impression of the new burs head office building.

scan here to view photo slideshows of each of these projects.


INDUSTRY UPDATE

the annual bloembuild expo was held from 23 to 24 july in bloemfontein, hosted by the Free state institute of architects (Fsia) in conjunction with the university of the Free state department of architecture.

While Fsia members showcased their architectural designs and service providers exhibited the latest product developments, industry experts presented insightful workshops and seminars.

Focusing on interiors, architect alphonse de jong from hCreation interior design & manufacturing spoke about architectural design principles that are both functional and

aesthetic, which can be applied to window treatments in order to provide solutions for interior design challenges. he pointed out that apart from referring only to curtains, window treatments make up the veil of a building.

showing examples of many different approaches and applications, de jong explained that contemporary window treatments are influenced by the arts and craft movement, where fine detail is extended throughout the design, as well as by abstract concepts such as hypersurfaces, which refers to a window treatment as an interior element interacting with natural elements such as wind, sound, light and people.

in his talk, johan van Wyk from the south african readymix association (sarma) highlighted that while cement quality is regulated, concrete is not. therefore specifications are crucial in determining the quality of concrete and ultimately the responsibility when failures occur. he further emphasised the importance of all members on the construction team working together to agree on a measurable specification, plan for testing and ensure that the specification is adhered to on site.

the bloembuild event further provided media partners, Walls & rooFs, and sister publication Floors the opportunity to engage with an audience of architects and other professionals involved in the construction industry, as well as students interested in the built environment.

Free state institute of architectstel: 051 447 4909Website: www.fsia.co.za

bloembuild brings togetHer arCHiteCts and students

The aNNuaL BLOemBuILd exPO WaS heLd FrOm 23 TO 24 juLy IN BLOemFONTeIN.


INDUSTRYUPDATE

entries for the Concrete manufacturers association npC (Cma) awards for excellence are now open. With ppC as the anchor sponsor, the awards aim to recognise excellence in the use of precast concrete and honour those professionally associated with its diverse applications.

the judges will consider the contribution of the precast concrete elements in the specific category where the project was entered; therefore the same project could be entered into more than one category.

anyone can take part, as long as the precast products entered for the competition were made by a Cma member. entries must be submitted no later than 16 october 2015.

six floating trophies will be presented to the manufacturers of the precast concrete elements in the nominated categories. in addition, commendation awards will be made to three runners-up per category providing these entries meet the standards of the judges. these trophies and commendation awards will be presented at a gala dinner ceremony at summer place in johannesburg on 23 april 2016.

entry forms and leaflets, which cover the rules of the competition, can be downloaded at www.cma.org.za. any enquiries regarding the competition should be referred to the competition organiser, john Cairns, on 011 431 0727 or 079 884 7986 or via [email protected].

Concrete manufacturers associationtel: 011 431 0727Website: www.cma.org.za

the winners of the Cma’s 2012 awards for excellence competition.

award categories:

• aesthetics commercial.

• aesthetics residential (private single dwellings).

• Community upliftment.

• technical excellence.

• innovation.

• precast for life.

preCast ConCrete awards Call for entries


INDUSTRY UPDATE

soCial gain awards: WinnerS announced

the winners of the inaugural architecture for social gain awards 2015, announced in august, will travel to paris in october to take part in the official saint-gobain 350th anniversary celebrations.

having attracted a total of 38 project entries across the three categories, Future, built and adopt-a-school, and an impressive 8 896 public votes for the people’s Choice award in just one week, as well as international interest from the united states and germany in particular, the competition’s popularity was affirmed.

“We were thrilled with the number of online entries received as these awards challenged industry norms. With the call for strictly digital entries architects were challenged to move beyond the traditional medium of submitting hardcopies of drawings and renderings, and embrace the realm of the video entry format, which encouraged digital story-telling around submissions,” says evan lockhart-barker, managing director of Weber saint-gobain.

the quality of the entries and the digital submissions impressed the judges so much so that an additional award for “best movie” was added to the competition during the judging process.

the social gain awards were conceptualised by saint-gobain to recognise and reward talent in the design of spaces that promote learning and development, as part of the company’s 350th anniversary celebrations.

t h e w i n n e r S built category – 18 entries.

Overview: projects completed between january 2011 and june 2015. these are spaces where people can develop themselves and includes new and renovated work.

architects: local studio – johannesburg.

Project: outreach Foundation Community Centre – hillbrow, johannesburg.

Future category – 17 entries.

Overview: proposed future developmental projects. it includes unbuilt work and proposals for projects or commentary.

architects: Kmh architects – Cape town.

Project: the market theatre Foundation multipurpose Facility.

adopt category – 3 entries.

Overview: entrants chose a school from a supplied list, and supplied and submitted a design proposal. the winning proposal will be built in 2016 by saint-gobain in association with adopt-a-school Foundation.

architects: Kate otten architects – johannesburg.

Project: motshegofadiwa primary school – hammanskraal.

people’s choice award

Overview: all entries were posted on the social-gain.co.za, website where people could vote by liking or sharing on social media.

architects: stauch Voster architects, ecobrick exchange (with 2 392 votes).

Project: penguins pre-school.

best Movie award

overview: this award was introduced to recognise an architectural practice that embraced the format of digital submissions with a movie that told a story of a building, which demonstrated the fundamental principle of social gain and user satisfaction.

in a documentary-style movie, east Coast architects used one of the Vele secondary school learners to take the viewer through the project, highlighting every sustainable design feature from the vegetable gardens to the recycling of greywater in the bathrooms.

architects: east Coast architects – durban.

Project: Vele secondary school – limpopo province.

Visit www.social-gain.co.za to view all the submissions in the 2015 architecture for social gain awards.

saint-gobaintel: 012 657 2800Website: www.saint-gobain.co.za

thomas Chapman from local studio accepts the built Category award. he is with bongani bingwa, French ambassadoress elizabeth barbier and saint-gobain’s evan lockhart barker.


INDUSTRYUPDATE

marley building systems has announced the acquisition of the south african gypsum business of lafarge involving etex.

“this acquisition is complementary to our business. being of equal size, we will team up to create a unique and competitive offer that capitalises on today’s southern african building trends,” says marc Vanoverbeke, regional director for africa at marley building systems. “the acquisition is also in line with etex’s vision of strengthening its position by investing in southern africa,” he adds.

etex is a belgian industrial group that manufactures and markets building materials, operating from 118 production sites in 43 countries, with over 17 000 employees. With annual sales of about three billion euro, etex is an international player in sustainable building materials and solutions.

its product offering is focused around four core businesses: Cladding and building boards in fibre cement and plaster, roofing materials, passive fire protection and high-performance insulation, and ceramic floor and wall tiles.

g r o w i n g t h e A f r i c A n M A r k e tFirmly established in europe and latin america since 1905 and 1937 respectively, etex is looking to strengthen its position on the african continent, with the southern african region and nigeria as the company’s main drivers of growth.

“in this region, the demand for housing has been on the rise for years,” explains Vanoverbeke. “the growing population, from 44 million in 2000 to 53 million inhabitants in 2013, is

one of the main reasons for this trend, along with an emerging middle class. to put this into perspective: south africa alone already accounts for 15% of africa’s gross domestic product (gdp) and has an average annual growth rate of 2,2%,” he notes.

“in addition, the southern african market is becoming increasingly regulated. Various quality standards are being adopted, with recent examples like sans 204 for energy efficiency in buildings and sans 517 for light steel Frame building. Consequently, alternative building methods such as dry construction are gradually replacing traditional construction,” Vanoverbeke states.

e n S u r i n g A S M o ot h t r A n S i t i o nin addition to amplifying its presence in southern africa, marley building systems will combine the expertise of various support functions, such as marketing, sales and customer service. thereby, the company is hoping to achieve higher operational excellence and service quality, and a more streamlined structure in the region.

the acquisition will become effective upon regulatory and competitions approval, after which a transition team will work to ensure the smooth merger of both companies.

marley building systemstel: 011 316 2121email: [email protected]: www.etexgroup.comwww.marleybuidingsystems.co.za

ma Jor gypsum business aCquis it ion announCed

etex’ product offering includes fibre cement and plaster boards.


INDUSTRY UPDATE

roofing solutions baCked by quality serviCeserving the local trade market through its 14 truss plants located across south africa, builders supplies quality roofing products as well as provides efficient service and support to the building industry.

however, builders understands that roofing is not only about the roof trusses, and therefore offers a complete solution that includes a full range of structural timber, underlays, fixings, fascias, bargeboards, cladding, roof tiles and roof sheeting. this enables local builders to get the required products and necessary advice for roof construction at one point of call.

S e r v i c e A n d S u p p o r tthe builders roofing division comprises a skilled team led by a national trade manager who oversees the manufacturing business. specialist key account managers mentor sales advisors located at the different branches to develop their technical roofing knowledge together with their sales skills, in order to answer customers’ roofing queries with accurate, quality information and advice. these managers also work proactively to identify areas where support may be necessary.

p r o f e S S i o n A l r o o f i n g S o lu t i o n Sthe 14 builders truss plants countrywide are certified by the institute for timber Construction through regular inspection

and audit. all the timber used for the trusses complies with sabs requirements in terms of structural grading and, where applicable, also treatment.

builders is currently in the process to also apply for sabs certification on manufactured trusses. once achieved, builders will be one of a very select group of manufacturers in the country whose products bear this prestigious mark.

in addition, builders uses design software, equipment and truss components provided by mitek south africa, part of the largest international truss design company, to ensure accurate and trusted designs.

builders tel: 0860 284 533Website: www.builders.co.za

builders has 14 roof truss plants across the country.

Cutting-edge design software is supplied by mitek south africa.


INDUSTRYUPDATE


INDUSTRY UPDATE

in the previous issue of Walls & rooFs, an advertisement for ite products was published containing the wrong text. here follows the correct text:

WaTerPrOOFINg SOLuTIONS

imperVite® is a silane/siloxane system that prevents any water from entering the pores of building material such as concrete, plastered surfaces or natural stone facades. this therefore prevents any possible build-up of moss, algae or mildew on the surface of the raw building product.

imperVite® is a hydrophobic impregnation where the silane/siloxanes react with the silica matrix of the building product, resulting in a waterproof, yet vapour permeable system. unlike other waterproof coatings, imperVite® does not alter the appearance of the surfaces to which it is applied.

ite productstel: 011 864 4918email: [email protected]: www.iteproducts.co.za

fresH faCe to lead i idjason Wiggin is set to become the youngest president ever of the south african institute of the interior design professions (iid) when he officially takes over as president in september, after a yearlong stint as president elect.

embracing his role as brand ambassador for both the iid and for interior design as a whole, Wiggin is focused on promoting and advancing the industry, growing the iid’s membership and particularly involving the next generation of designers and decorators.

S u p p o r t i n g f u t u r e Wiggin counts himself lucky for having had a good mentor during his career and says it is something every new designer needs.

“many of our members are established designers and decorators, and the idea is for young professionals to interact with them during our nationwide events and find mentors. i think this is vital and something that the iid can help provide,” he says.

“designers are often guarded with their knowledge and connections, but for the industry to really develop, we need to be an open book and promote suppliers and fabricators, not only to assist each other but also to help the industry grow,” he adds.

tA l k i n g t h e S o c i A l l i n g oanother focus of Wiggin will be to gear up social media and communicate with members in a much more energetic way. “it is about joining the digital age and engaging in a more casual

way to balance the formalities that are part and parcel of being a governing body,” he says.

as head of department at the greenside design Centre and still involved in freelancing professionally, Wiggin is well positioned to understand and engage with students, while being an overall representative for the iid.

iidtel: 011 486 0450Website: www.iidprofessions.org.za

“FOr The INduSTry TO reaLLy deveLOP, We Need TO Be aN OPeN BOOK” he addS.

jason Wiggin, iid president.

“IT IS aBOuT jOININg The dIgITaL age aNd eNgagINg IN a mOre caSuaL Way,” he SayS.

e r r At u M : wAt e r p r o o f i n g S o lu t i o n S

roof sheeting - a modern choice

Documents