sa roofing nov / dec 2015 | issue: 75
DESCRIPTION
SA Roofing is the only publication in South Africa that is dedicated exclusively to the residential, commercial and industrial roofing and re-roofing industries.TRANSCRIPT
NOV / DEC 2015 ISSUE: 75WWW.TRADEMAX.CO.ZA SA R36 EACH INCL. / R360 PER ANNUM INCL.
NOVEMBER / DECEMBER 2015 ISSUE: 75
EDITOR’S COMMENTS ..................................................................................................... 2CONTRIBUTORS ................................................................................................................ 4UPCOMING EVENTS ........................................................................................................ 6CEILINGS & INSULATION ......................................................................................... 8-13 COVER STORY............................................................................................................. 14-16TENDER STANDARDS .............................................................................................. 18-19CEILING RETROFITS ................................................................................................. 20-21INSULATION RETROFIT .......................................................................................... 23-24ACOUSTIC INSULATION ........................................................................................26-27ROOF DESIGN SOFTWARE ...................................................................................28-30POLYCARBONATE ROOF SHEETING ................................................................34-35ROOF REPLACEMENT .............................................................................................. 37-38STAINLESS STEEL ROOFING ................................................................................. 40-42ASPHALT ROOF SHINGLES ................................................................................... 45-46WATERPROOFING CASE STUDY ........................................................................48-50 ROOF & CEILING CLEANING ............................................................................... 52-53THATCH ........................................................................................................................54-55ISO9001 QUALITY STANDARD ............................................................................56-57CEILINGS ............................................................................................................................. 58 WATERPROOFING .......................................................................................................... 59LIGHTING .....................................................................................................................60-61ENERGY EFFICIENCY...................................................................................................... 63ENERGY SOLUTIONS .....................................................................................................64
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Trademax Publications
SA Roofing Tel: 0861 SA ROOF (0861 727 663) Fax: 0866 991 346Email: [email protected]
Postnet Suite 241 Private Bag X103 N1 City
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PUBLISHER: Billy Perrin
082 266 6976
EDITOR: Celéste Perrin
ADVERTISING: Jacqui Marsh
LAYOUT & DESIGN: Craig Patterson
SUBSCRIPTIONS: Belinda Thwesha
DISCLAIMER The views expressed herein are not necessarily those of Trademax Publications. Although we have done our best to ensure the accuracy of our content, neither Trademax Publications nor SA Roofing magazine will be held liable for any views expressed or information disseminated, in editorial content or advertisements, in this issue.
EDIT
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It’s almost incredible that another year is coming to a close. Where did the past 11 months disappear to, so quickly? Working from behind the editorial desk, and exposed
to a myriad of communications daily, it often feels that the way time is speeding by nowadays is only accelerated by the seemingly endless advances in communication technology. More and more, things are coming at us faster and faster. I’m not convinced that every new innovation is to our benefit, but nevertheless, here I find myself almost at the end of 2015 and wondering how I might slow time down and maybe, just maybe, slot an extra hour into each day. Wishful thinking.
It’s been a tough year for many of us. Considering the prevailing trade and economic hardships that several industries face, the roofing sector not excluded, we hope you could overcome the difficulties and that advancement and success was a part of your year-that-has-been. It certainly was for Youngman Roofing, who grace the cover of this issue and proudly but modestly share with us some of their more recent successes and accomplishments. Their story shows again that bigger and better things are possible through good planning and with good people.
Other roofing matters in this issue that made us feel really good include a large-scale ceiling retrofit programme that will, literally, improve lives (page 20), a comfortable home for orphaned rhinos (you’re going to love the baby on page 35), and a new school roof for learners (page 45). Add to that the usual stellar projects we cover and a fresh look at the surprising qualities of stainless steel in the world of roofing, and things are looking up for our industry.
As we enter the so-called ‘silly season,’ our team here at SA Roofing wishes your team all the very best for a wonderful, safe holiday period. We hope your stocking is filled with good tidings and the sort of success that will follow you into 2016 and beyond.
Enjoy the read and – see you next year!
Celéste
Of success and successions “To have success, you can't let failure stop you. To have great
success, you can't let success stop you.” – Robert Brault
NOV/DEC 20152
The August 2015 edition of the SA Roofing magazine carried a feature on pages 22 and 23 that described the formation of TIPSASA, a new industry association that
came about after a majority of TIASA members voted for independence from AAAMSA. Whilst the article got most of the facts right, it has been brought to my attention that certain points warrant further clarification so as to avoid any misimpression of the role of TIPSASA and TIASA, respectively.
Specifically, the use of the TIASA logo on the advert on page 23, does not reflect the new TIPSASA logo, and some of the former interim board members of TIASA are now board members of TIPSASA. They are: Ms Lisa Reynolds (Saint-Gobain), Mr Alf Peyper (Alf Peyper Consultants), Mr Lammie de Beer (Technopol SA), Mr Grant Richardson (Granric Insulation) and Mr Gary Sweeney (Spunchem International) with no association to TIASA.
I would like to take this opportunity to apologize for any inconvenience caused to either TIASA or TIPSASA members, and for any misimpression created by the article or the accompanying image.
I welcome the opportunity to provide the following clarification: The corporate members as shown, are in fact members of TIPSASA. They are: Africa Thermal Insulation, Bhamuza, Eco-Insulation, Granric Insulation, Isofoam SA – Isoboard, Brits Nonwoven – Isotherm, Isover Saint-Gobain, Kingspan Insulation, Kingspan Insulated Panels, Platinum Fibre, Afripack Coatings – Sisalation, Spunchem International – Spunsulation, Technopol SA, Datlink Insulation – ThermocousTex and Thermguard.
I trust this explanation has sufficiently clarified matters, but invite anyone with any further questions or concerns to contact me directly at 082 305 8559.
Des SchnetlerTIPSASA Chairperson
TIPSASA issues corrective statement
Comment from Des Schnetler, TIPSASA Chairperson:
8302 - LAMBDABOARD (DICE) A4 ADVERT Paths.indd 1 2015/10/14 11:45 AM
ContributorsC
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Diederik van ’t Hof is the owner of Roof Rats, a cleaning company specializing in vacuuming ceilings and extracting pests from domestic and commercial roofs. (Roof Rats was the 2013 winner of the Sage Pastel/Radio 702 Small Business Award.) He is also the owner of Touch Africa Safaris that offers tailor-made eco-tours throughout South Africa for groups up to 82 in number, both corporate and
private. After graduating from high school with full university exemption, he went on to earn a Bachelor of Science degree from the University of the Witwatersrand in 1988, majoring in zoology and botany while showing his broad field of interest by taking additional subjects such as Zulu and archaeology, and also complementary biological science courses in genetics, statistics and biochemistry.
A registered National Tourist Guide in Culture & Nature, van ’t Hof gained extensive travel experience in an early career while leading camping and hotel-based tours through South Africa and neighbouring states on behalf of major tour operators. Tours lasted up to 21 days and required extensive route planning, equipping van ’t Hof with the requisite experience and organizational skills to become a Ranger with the Natal Parks Board, as well as a Wilderness Guide with Educational Wildlife Expeditions, and eventually a registered Swaziland guide. In addition, van ’t Hof is a serving officer in the part-time forces with the South African National Defense Force and is course-qualified to the rank of Lieutenant Colonel.
His other achievements include the issuance of a pilot’s license, qualifications as an advanced open water scuba diver and stress & rescue diver (certified in several proficiencies), and obtaining provincial colours in combat rifle shooting. When van ’t Hof is not busy working or taking part in other intense, high-energy activities that he is qualified for, he indulges in his hobbies of photography, enjoying nature, and bird watching.
DIEDERIK E. J. VAN ’T HOF
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SA Roofing thanks TIPSASA for editorial oversight provided in this issue. TIPSASA (Thermal Insulation Products & Systems Association SA) is a non-profit company made up of manufacturers, suppliers, contractors and consultants in the South African thermal insulation industry, formed to assist with the promotion, selection, specification and installation of thermal insulation products and systems and to combat the use of cheap, substandard and unsafe products and practices.
SA Roofing welcomes sassda to this issue and thanks the association for its editorial contribution that highlights stainless steel as a sound roofing material. Since 1964, sassda (the Southern Africa Stainless Steel Development Association) has been increasing the awareness and use of stainless steel in Southern Africa, and provides a platform for its members to collectively promote the sustainable growth and development of the industry with the main emphasis on stainless steel converted within the South African economy.
NOV/DEC 20154
Built over years, perfected with time.
JCP Roofing is a family business that came into existence through JCP STEEL, a company that
has been serving the steel industry with flat steel products for over 22 years, with a reputation for excellent
service, uncompromising quality and impressive lead times.
Expanding our portfolio to supply IBR and corrugated roofing sheets to the same level of service our customers grew accustomed to over the years, has been our vision
and dream. Take the time to call us on 011 814 1898 and we will help you perfect your project
Products: IBR • Corrugated • Polycarbonate Sheeting • Bullnosing/Cranking • Flat Sheets • Screws & Fasteners
Tel: +27 11 814 1898 | Fax: +27 11 814 2166 Email: [email protected] | Web: www.jcproofing.co.za
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Upcoming EventsAFSA INTERNATIONAL ALUMINIUM CONFERENCE & EXHIBITION16 – 18 MARCH 2016 | LAGOON BEACH HOTEL, CAPE TOWNVisit www.afsa-aluminium-conference.co.za for more info
AFRICAN CONSTRUCTION AND TOTALLY CONCRETE EXPOS9 - 11 MAY 2016 | GALLAGHER CONVENTION CENTRE, MIDRAND, JHBVisit www.totallyconcrete.co.za and www.construction-week.com for more info
HOUSING FOR AFRICA CONFERENCE AND EXPO9 - 11 MAY 2016 | GALLAGHER CONVENTION CENTRE, MIDRAND, JHBVisit www.housingforafrica.com for more info
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INTERBUILD AFRICA 2016(CO-LOCATED SHOWS: GLASS EXPO AFRICA, PLUMBDRAIN AFRICA, ECOAFRIBUILD, WOODPRO AFRICA AND HARDEX AFRICA) 17 – 20 AUGUST 2016, EXPO CENTRE NASREC, JHBVisit www.interbuild.co.za for more info
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“The South African Wood Preservers Association (SAWPA) is an industry body that represents the primary timber treatment industry consisting of treatment plants as well as the suppliers of chemical wood preservatives to these plants. Our main objective is to promote the treatment of of timber and the use of treated timber, whilst we also act as a centre for technical information and represent our members on different forums on matters of importance related to the industry.”
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TOTALLY CONCRETE CONFERENCE AND EXPO is the African educational and networking platform for insights into the latest developments and technologies associated with the concrete and construction industry. The event is designed to address challenges, demands and opportunities, including driving green initiatives and the entry of cement manufacturers into the marketplace.
HOUSING FOR AFRICA CONFERENCE AND EXPO is a forum focusing on the planning and development of sustainable housing infrastructure in Africa. With the continent now experiencing the world’s fastest economic growth and highest urbanization rate, this forum highlights the latest technologies, thinking, approaches and strategies.
NOV/DEC 20156
Cnr Berkley Road and Bax Street, Maitland, Cape Town 7405
Air can contain varying amounts of water vapour, with warm air able to hold more than cold air. When warm air comes into contact with any colder surface, it cools
down, at which point it can no longer retain the same amount of water vapour, shedding some of it – and condensation occurs.
Inside a house, significant amounts of moisture can be added to the indoor air just through normal daily activities that produce warm air (such as cooking or doing laundry). If that moisture-laden air can’t escape through an air vent or open window, it will continue to build up until it eventually reaches its dew point or saturation point. And as mentioned, when it makes contact with a colder surface, condensation will occur on that surface. This so-called ‘thermal bridge’ can happen on any surface – from a metal window frame to a poorly insulated external wall, a roof or a ceiling.
CONDENSATION IN THE ROOFWhile moist air is preferable to excessively dry air, high relative humidity – a factor that is prevalent in small, overcrowded dwellings – will lead to condensation. If that condensation occurs within the roofing system and results in dripping from the roof, it can cause considerable discomfort to the person sleeping below. If the bedding gets and remains wet, it is very difficult to maintain one’s normal body temperature at night.
Extreme condensation may lead to eventual degradation of the building structure. In addition, condensation increases the risk of mould growth, and germinating mould spores can be tied to conditions like rhinitis, asthma and other respiratory infections, including TB.
But not only overcrowded or low-income dwellings are susceptible to condensation. Almost any house in most regions
in South Africa can experience some condensation in winter, due to, for example, cooking with all the windows closed, and washing and tumble-drying clothes indoors. Climate, however, is probably the most important factor to account for in combating condensation.
SCCPA: THE SOUTHERN COASTAL CONDENSATION PROBLEM AREAIn 2000, the company Transfer of Energy, Momentum and Mass International (Pty) Ltd. conducted research on behalf of the National Home Builders Registration Council, the findings of which were subsequently presented to the board of Agrément South Africa.
As low-cost housing in some South African coastal areas were showing a marked tendency towards forming condensation on internal walls and roofs in winter, the study focused on the thermal performance of low-income dwellings, using computer modelling as well as on-site assessments. The results showed that condensation is mainly a problem in the coastal area of the southern Cape, referred to as the Southern Coastal (or Cape) Condensation Problem Area or SCCPA. The study resulted in new condensation boundaries being established in the region. The SCCPA boundary stretches from Malmesbury close to the south-west Cape coast, curving northwards to include Tulbach and Ceres but not Worcester, continuing north of Swellendam and Riversdale and then between Oudtshoorn and George. Staying south of the coastal mountain ranges but close to the Cape coast and escarpment though the Western Cape Province, it eventually curves north again to include Uitenhage, Kirkwood and Grahamstown, up to and including Port Alfred in the Eastern Cape Province.
THE SOUTHERN COASTAL CONDENSATION PROBLEM (SCCP) AREA
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While the whole country is ready to enjoy hot summer weather, some regions cannot escape their year-round rainfall and cooler temperatures.
We are reminded why proper thermal insulation is important in preventing severe condensation that could affect the roofing system.
NOV/DEC 20158
The SCCPA is marked by receiving prolonged periods of cold and rainy weather, with rain not only in winter, but year round (annual rainfall for the research was recorded at 250mm – 500mm). Under such severe climatic conditions, building elements (particularly concrete block walls and fibre-cement roofs) are likely to become waterlogged by rain ingress. In addition, external and internal surfaces of the building envelope are cooled to below the dew point, and condensation is likely to occur in building cavities such as roof spaces and the underside of roofs. Again, over a prolonged period this can negatively impact the structural system and, as a result of potential mould growth, compromise internal air quality unless appropriate preventative measures are taken.
SPECIFICATION CHANGES Once the results of the research were known, Agrément SA responded with recommendations to address the problem through the use of thermally insulated ceilings, the ventilation of roof spaces, and the external plastering of walls.
These applications would result in reduced dripping of moisture from the underside of roofs, an increase in interior wall temperature, and a rising of the temperature of those surfaces so that dew point would not be reached on the interior surface.
The extra plaster has a dual effect of increasing the thermal resistance of the walls and the resistance to moisture transfer.
In addition to improving the thermal performance of the building, another preventative step that can be taken is the provision of effective vapour barriers in appropriate positions so as to prevent rotting of timber studs or timber roof truss components, or corrosion of steel studs and wall ties.
The SCCPA, and the impact of climate in general, is today widely recognized in the industry. While the design and construction of the most typical types of buildings are standardized across South Africa, standard regional adjustments can be made to accommodate different environmental conditions and to provide suitable indoor climates in different climatic zones.
Moreover, site-specific adjustments may be called for. Accordingly, extraordinary development conditions refer to site characteristics which necessitate that some measures over and above the ‘norm’ are required to ensure satisfactory building outcomes. Extraordinary development conditions relate to:
• Climatic, • Topographic (natural ground slope of the site), and • Geotechnical (inherent geology) conditions.
TOWNS THAT FALL WITHIN THE SOUTHERN COASTAL CONDENSATION PROBLEM AREA
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Addo Dana Bay Kalbaskraal Pacaltsdorp Southwell
Alexandria Despatch Kareedouw Papiesvlei Stanford
Amsterdamhoek Droë Vlakte Kariega Paradise Beach Stellenbosch
Askraal Elgin Kasuka Paterson St Francis Bay
Aston Bay Elim Kenton on Sea Pearly Beach Still Bay
Atlantis Fairfield Kleinmond Philadelphia Storms River
Baardskeerdersbos Firgrove Klipdale Plettenberg Bay Strand
Bellevue Fish Hoek Knysna Pniel Struis Bay
Bethelsdorp Gans Bay Kommetjie Port Beaufort Sunland
Betty’s Bay George Kruisfontein Port Elizabeth Swartkops
Bloubergstrand Gordon’s Bay Kuilsrivier Protem The Crags
Bluecliff Gouritsmond Kylemore Riethuiskraal Vermaaklikheid
Boesmansriviermond Grabouw Loerie Rietpoel Viljoenskroon
Boknesstrand Groot Brakrivier Malgas Rondevlei Vlees Bay
Botrivier Groot Jongensfontein Melkbosstrand Salem Waenhuiskrans
Brandwag Hartenbos Milnerton Scarborough Wilderness
Bredasdorp Hawston Mossel Bay Sea View Windmill
Caledon Hermanus Muizenberg Sedgefield Witsand
Cape Town Hermon Napier Simon’s Town Wittedrif
Clarkson Herold’s Bay Noanaha Sinksabrug Witteklip
Coega Hout Bay Onrus Skipskop Woodlands
Coerney Humansdorp Oukraal Slangrivier Wydgeleë
Colchester Jeffreys Bay Oyster Bay Somerset West
NOV/DEC 2015 9
STANDARDS FOR PUBLIC SCHOOL INFRASTRUCTURE The ‘Minimum Uniform Norms and Standards for Public School Infrastructure’ in terms of the South African Schools Act of 1996, gazetted on 29 November 2013, requires that, inter alia, a “school design must comply with all relevant laws, including the National Building Regulations.”
Part XA of the National Building Regulations establishes requirements for Energy Usage. One of the requirements under these regulations is that:
• New buildings and extensions to buildings are designed and constructed so as to use energy efficiently in order to reduce greenhouse gas emissions.
Compliance with the design and construction requirements can be demonstrated by means of one of three methods, namely:
1. Adopting the orientation, shading, services and building envelope provided in the rules contained in SANS10400 Part XA;
2. Demonstrating by means of a rational design that the energy usage of such building is equivalent to or better than that which would have been achieved by adopting the rules provided in SANS10400 XA, or
3. Determining using certified software that the theoretical energy usage performance is less than or equal to that of a reference building in accordance with the provisions of SANS 10400 Part XA.
Most schools are likely to satisfy the requirements of Part XA of the National Building Regulations using the first of the aforementioned methods. This method requires, inter alia, that:
• The orientation of the major windows of any school building should be facing north in order to take advantage of winter solar gain. This orientation is, however, not mandatory, and may not make sense in all climatic regions and locations. Shading only becomes mandatory where the fenestration area (glazing and framing elements that are fixed or moveable) to the net floor areas exceeds 15%. This is not the case in the prototype designs for schools.
• SANS10400 XA does establish fenestration air infiltration requirements which need to be assessed in accordance with the provisions of SANS 613. Opening windows will typically be required to be fitted with flexible gaskets to satisfy these requirements.
• The external walls of schools are required to be built of masonry or alternatively to be thermally insulated to the level stipulated for low-mass construction methods. Cavity walls should, however, be provided in the SCCPA to address both condensation and rain penetration through walls.
• The roof and ceiling assemblies of all buildings are required to achieve a specified thermal resistance in each climatic zone shown in this article. The impact of this requirement on schools is that all classrooms will typically need to be fitted with ceilings that are insulated with bulk insulation to a thickness ranging between 100mm and 140mm, as well as an under-roof reflective foil roof-liner.
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Reg No: CoR18.3 2013/068719/07 VAT No: 4930188372
QUALITY FASTENING SYSTEMSMANUFACTURERS OF
JHB Branch: Contact: Tanny | Tel: 011 - 979 5026/7 | Cell: 082 782 6854 | P.O. Box 14353, Bredell, Kempton Park
Manufactured in Taiwan
DBN Branch: Contact: Summers | Tel/Fax: 031 - 765 1604 | Cell: 082 564 1463 | [email protected]
www.hengfuscrews.co.za
TIPSASA – The Thermal Insulation Products and Systems Association SA, can assist with the level of insulation required per climatic zone:
CLIMATIC ZONE MAP – SANS 10400-XA:2011
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CLIMATE ZONES 1 2 3 4 5 6
Minimum required Total R-value (m².K/W) (for roof solar absorptance of more than 0.55) 3.7 3.2 2.7 3.7 2.7 3.5
Direction of heat flow Up Up Down and Up
Up Down Up
Estimated Total R-Value (m².K/W) of roof and ceiling materials(Roof covering & plasterboard only) 0.35 - 0.40
0.41 - 0.53
0.35 – 0.40
Estimated Minimum added R-Value of Insulation (m².K/W) 2.30 – 3.35 2.15 – 2.29
3.10 – 3.15
GENERIC INSULATION PRODUCTS
DENSITY KG/M³
THERMAL CONDUCTIVITY
RECOMMENDED DEEMED-TO-SATISFY MIN THICKNESS (MM) OF INSULATION PRODUCT
Cellulose Fibre Loose-Fill 27.5 0.04 135 115 100 135 100 130
Flexible Fibre Glass Blanket 42295 0.04 135 115 100 135 100 130
Flexible BOQ Polyester Fibre Blanket 24 0.038 130 110 90 130 90 125
Flexible Polyester Blanket 11.5 0.046 160 140 120 160 110 150
Flexible Mineral/Rockwool 60-120 0.033 115 100 80 115 80 100
Flexible Ceramic Fibre 84 0.033 115 100 80 115 80 100
Rigid Expanded Polystyrene (EPS)SD 15 *0.035 120 100 90 120 80 115
Rigid Extruded Polystyrene (XPS) 32 *0.028 100 80 70 100 65 90
Rigid Fibre Glass Board 47.5 0.033 115 100 80 115 80 100
Rigid BOQ Polyester Fibre Board 61 0.034 115 100 80 115 80 110
Rigid Polyurethane Board 32 *0.025 85 70 60 85 60 80
NOTE: The deemed-to-satisfy recommended levels of insulation can be achieved by the use of reflective foils, bulk insulation or rigid board insulation or in combination with one another. Maximum efficiency may be achieved at reduced thicknesses taking the aforementioned into account.
(*)Thermal efficiencies are dependent on materials thickness, density, age, operating temperature and moisture
RECOMMENDED LEVELS OF INSULATION TO ACHIEVE DEEMED-TO-SATISFY RULE FOR ENERGY EFFICIENCY IN AN UNVENTILATED ROOF AND CEILING CONSTRUCTION
ROOF & CEILING TOTAL SYSTEM R-VALUE (M².K/W)
ZONE R-VALUE m².K/W CLIMATIC CONDITIONS
1 3.7 Cold interior
2 3.2 Temperate interior
3 2.7 Hot interior
4 3.7 Temperate coastal
5 2.7 Sub-tropical coastal
6 3.5 Arid interior
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SANS 10400-A GENERAL PRINCIPLES AND REQUIREMENTS - REGULATION A20 CLASSIFICATION AND DESIGNATION OF OCCUPANCIES APPLICABLE TO ENERGY EFFICIENCY REGULATION XA ENERGY USAGE IN BUILDINGS.
A1 Entertainment and public assemblyOccupancy where persons gather to eat, drink, dance or participate in other recreation
A2 Theatrical and indoor sportOccupancy where persons gather for the viewing of theatrical, operatic orchestral, choral, cinematographical or sport performances.
A3 Places of instructionOccupancy where school children, students or other persons assemble for the purpose of tuition or learning.
A4 WorshipOccupancy where persons assemble for the purpose of worshipping.
C1 Exhibition hallOccupancy where goods are displayed primarily for viewing by the public.
C2 MuseumOccupancy comprising a museum, art gallery or library
E1 Place of detentionOccupancy where people are detained for punitive or corrective reasons or because of their mental condition
E2 HospitalOccupancy where people are cared for or treated because of physical or mental disabilities and where they are generally bed-ridden
E3Other institutional (residential)Occupancy where groups of people who either are not fully fit, or who are restricted in their movements or their ability to make decisions, reside and are cared for.
E4Health careOccupancy which is a common place of long term or transient living for a number of unrelated persons consisting of a single unit on its own site who, due to varying degrees of incapacity, are provided with personal care services or are undergoing medical treatment.
F1 Large shopOccupancy where merchandise is displayed and offered for sale to the public and the floor area exceeds 250 m²
F2 Small shopOccupancy where merchandise is displayed and offered for sale to the |public and the floor area does not exceed 250 m².
F3 Wholesalers' storeOccupancy where goods are displayed and stored and where only a limited selected group of persons is present at any one time.
G1 OfficesOccupancy comprising offices, banks, consulting rooms and other similar usage.
H1 HotelOccupancy where persons rent furnished rooms, not being dwelling units.
H2 DormitoryOccupancy where groups of people are accommodated in one room.
H3 Domestic residenceOccupancy consisting of two or more dwelling units on a single site.
H4 Dwelling houseOccupancy consisting of a dwelling unit on its own site, including a garage and other domestic outbuildings, if any.
H5HospitalityOccupancy where unrelated persons rent furnished rooms on a transient basis within a dwelling house or domestic residence with sleeping accommodation for not more than 16 persons within a dwelling unit.
FOR MORE INFORMATION ON THERMAL INSULATION:
TIPSASAThermal Insulation Products and Systems Association SA(t) 0861 000 334 / (012) 663 5200(e) [email protected](w) www.tipsasa.co.za
REFERENCESAgrément South Africa. ‘© Performance criteria: building and walling systems – for condensation.’ August 2002.
National Treasury Department, Office of the Chief Procurement Officer, ‘Cost Model for the Establishment of Control Budgets for Primary and Secondary Schools.’ 8 June 2015. http://www.treasury.gov.za/legislation/pfma/TreasuryInstruction/Annexure%20A%20-%20Cost%20Model%208%20June.pdf Accessed 18 October 2015.
The Clay Brick Association of Southern Africa. ‘Technical Note #03 Preventing Mould Growth in Low Cost Housing.’http://www.claybrick.org.za/tech-note-03-preventing-mould-growth-low-cost-housingAccessed 18 October 2015.
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How does a company become world class? Is it perhaps by exceeding both its own and its market’s expectations? Could it be a mere case of doing things
better than competitors? Or is it a matter of being different, by operating outside the norm and pushing the envelope?
At Youngman Roofing, we have strived through the years to continuously improve, turning our weaknesses into strengths, and strengths into great successes. And not only do we measure ourselves against our own past achievements, we constantly challenge ourselves with brand new ideas and ventures in order to become more effective and to offer a greater variety of quality products and services to our valued clients.
It is certainly no easy task to get to the highest level, and mention must be made that, to become world class, a business must put together a world class team first – something we believe we have achieved over the years. And it shows. Our commitment to satisfy our clients’ needs through flexibility and with dedication is backed with a service orientation not easily rivalled.
THE WHEREWe operate out of Ndabeni, Maitland, from new premises that boast a factory layout carefully designed to optimize the handling of goods while minimizing the waiting period for those clients collecting as well as our own delivery vehicles when loading.
In addition, we supply material from our branch in Wetton, called Rossgo Roofing, where a friendly and effective team is always ready and eager to assist.
Recently we also acquired a share in Roof Handler in George, a company that shares our values and commitment to superior client service. We supply our range of quality products to the branch on a weekly basis.
CO
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Youngman RoofingConstantly driving towards improvement, innovation and excellence,
Youngman Roofing is reaping the rewards of this philosophy. Here, the company shares some of the secrets of its success.
Green Technology Industrial Park in Atlantis - The building owner is GRI Renewable Industries, wind industrial division of Corporación Gestamp.
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THE WHATROOF SHEETING: We are proud suppliers of quality roof sheeting material. Our pierced-fix profiles on offer include corrugated, IBR and Widek, and we have a range of concealed-fix profiles available, including our well known and highly regarded Diamondek, a profile designed for high wind areas and also application on very low pitches.
POLYMER MATERIALS:In our drive to offer the full basket of related products, we have recently become a preferential supplier of the Palram range of high quality polymer material, including UV2 polycarbonate and PVC sheeting in a variety of profiles.
INSULATION:On the insulation front, we have obtained the sole distributorship for LAMBDABOARD in the Western Cape, as well as the ThermocousTex range of acoustic and thermal insulation. Not to mention preferential agreements with a few other suppliers, including Afripack, supplier of Sisalation®, a quality insulating foil.
FASTENERS:To fix our sheeting, we proudly offer the full range of Corroshield® quality fasteners.
Our aim is to maintain high stock levels of line items in order to satisfy high volume demand – especially by the last quarter of the year when larger projects near completion.
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SERVICESTo complement our range of products, we provide off-plan estimating. Furthermore, our service offering includes a team of experienced estimators who perform on-site measuring for accurate quoting purposes, can provide on-site technical assistance, and can successfully deal with any queries that might arise.
We offer merchant training in store as well as at our premises. We are also happy to visit architects and other professionals to offer friendly, effective assistance and guidance with specifications.
Our growing fleet of colourful delivery vehicles is well maintained, ensuring fast and effective daily deliveries to most areas in the Western Cape. This important function is supported and organized by our extremely efficient and capable distribution department.
PROJECTSWe are proud to have supplied a number of prestigious projects during the past few years, most notably the new Brackenfell Secondary School, the new Melkbosstrand Secondary School, and the impressive new Atlantis plant for GRI Renewable Industries, the wind-turbine division of Corporación Gestamp.
If you’re looking to partner with a world class company you can rely on to meet your roofing requirements, your search is over.
FOR MORE INFORMATION: Youngman Roofing(t) 021 511 8125(e) [email protected](w) www.youngman.co.za
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Brackenfell Secondary School.
Above and below: Melkbosstrand Secondary School.
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Cnr Berkley and Bax Roads, Maitland 7405
AUTHORIZED DISTRIBUTOROF LAMBDABOARD AND PALRAM TRANSLUCENT SHEETING
New Youngman premises:Architecture by Martin Commerford of DHA and interiors by Leon Saven Design
Van den Heever says the inability of a contractor or PSP to perform professionally can have far-reaching repercussions that could spread to all members of the
building industry involved in a failed project. "Apart from contractors or subcontractors, it also negatively impacts on the client's perception of his or her consulting team's performance when the final redress for bad performance, the termination of the contract, is the inevitable result,” he says.
"But is the contractor or PSP solely to blame? Can he or she be held accountable if the selection process is flawed? In South Africa, the Preferential Procurement Policy Framework Act (PPPFA) only allows the measurement of two criteria in awarding tenders for government projects: Price, as the dominant dimension, and then preference,” van den Heever continues.
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building performancesBert van den Heever, president of the Association of SA Quantity Surveyors
(ASAQS), contends that South Africa's ineffective tender process could primarily be contributing to the rising number of complaints regarding the inability of
contractors and professional service providers (PSP) employed on ‘government projects’ to deliver good quality buildings on time and within budget.
Construction site, image courtesy of MBA North.
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"In my opinion, many of the problems that arise during the construction phase could be avoided if tenders were to be awarded using weighted criteria that, along with price and preference, also factored in relevant experience, past performance, technical skills, management skills and resources, and the methodology to be used. Here methodology refers to the procedures or innovative methods the tenderer proposes to use to achieve the specified end results,” he explains.
"In the Rainbows Civils court case, in which Rainbows Civils took the government to court to apply for the review and setting aside of the award of a government tender, the court held that it is a constitutional
imperative under section 217(1) of the SA Constitution, particularly the cost-effectiveness principle, that functionality be taken into account in deciding which bid should be awarded the contract. In this regard, the court reasoned: "It is self-evident that it is not cost effective to award a tender to a party who ticks the right boxes as regards price and preference, but is unable to get the job done properly - whether through lack of experience, adequate personnel or financial resources."
"The High Court in this case expressed a strong preference for use of functionality, or in other words, quality, as an award criterion," van den Heever observes. "Prof Geo Quinot of the Department of Public Law at Stellenbosch University, in his article titled 'The Role of Quality in the Adjudication of Public Tenders' published in the Potchefstroom Electronic Law Journal, explored the quandary that the quantity surveying industry finds itself in. He concluded that "the precise role of quality, expressed as functionality, in public procurement adjudication in South African public procurement regulation, remains unclear."
Van den Heever adds: "This, I argue, is one of the root causes of the procurement problems quantity surveyors face in this country. I believe the time has come for ASAQS, in collaboration with other willing role players in the building industry, to call for the public tender adjudication process to be improved – to place more emphasis on quality and proof of relevant experience and competence, than mainly on price and preference as matters now stand."
Charl Venter, president of Master Builders Association North, says he completely agrees with the comments of ASAQS. "The government should realize that quality will always be questionable when awarding contracts to the lowest tender without properly assessing the expertise of the party awarded the contract. When such a contractor fails to perform, the tender tends to simply be awarded to another – whose credentials were also not properly checked. And so the process continues. We hear of many projects where contractors had to be replaced more than twice,” Venter remarks.
"The alarming fact is that all these failures push up the cost of a project, and ultimately the taxpayer has to carry the burden for a tender policy that urgently needs revision. There is also no guarantee on the quality of structures that were completed by contractors selected purely on price and preference," he cautions.
For more information, visit the ASAQS website at www.asaqs.co.za.
Bert van den Heever, president of ASAQS. "The tender process should place more emphasis
on quality, and proof of experience and competence," he has urged.
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In a statement by Mayor de Lille that followed a visit to Eureka Estate, a phase-1 recipient of the City of Cape Town’s redress project through which houses are being
properly fitted with ceilings, she said the period between 1994 and 2005 saw State-subsidized housing units constructed without insulated ceilings and weatherproofing, because this was not included in the RDP subsidy provided by the National Government at the time. After 2005 this changed, and ceilings were included in the subsidy for all new RDP houses.
“However, in the City of Cape Town, we had not forgotten about those who were still without a proper roof over their heads,” Mayor de Lille said, adding that the City had decided to conduct a retrofitting pilot project – a process whereby houses would be fitted with insulated ceilings and weather walls would be weatherproofed.
A GOOD START TO PHASE 1 An initial pilot project implemented in Mamre saw 260 ceilings installed, followed by installations in Kuyasa and Khayelitsha as well as a R4.1-million, 250-unit fitting at Eureka Estate, which Mayor de Lille visited. But much more needs to be done.
Mayor de Lille indicated that there are an estimated 40,000 RDP subsidy houses in the City without ceilings and weatherproofing. Living without a ceiling has caused residents great discomfort, as they are affected by the poor thermal performance of the homes, damp conditions, and inferior internal air quality that gives rise to health problems.
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efficient ceilings “In line with our commitment to building a caring city, the City of Cape
Town has initiated a programme of redress aimed at correcting the wrongs of the past. One of those wrongs was the decision by National Government to build RDP houses without ceilings.” — Executive Mayor, Patricia de Lille
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“With City funding and capital raised from the Green Fund, our large-scale ceiling retrofitting programme will be rolled out to all 40,000 units at a cost of R400-million,” Mayor de Lille confirmed. With a start date of October, the programme will kick off with a 300-unit installation in Kalkfontein, a 400-unit fit in Lwandle, 1,600 units in Vrygrond, and 1,000 units in Wesbank.
As for funding for the initiative, Mayor de Lille advised that the City has secured around R133,6-million for the first phase of this redress initiative, which will comprise 8,000 units in total. In this phase, the City will spend approximately R91,6-million, with the balance coming from the Development Bank of Southern Africa’s Green Fund.
COMMUNITY UPLIFTMENT AND OTHER BENEFITSMayor de Lille, after her site visit, expressed satisfaction with the smooth progress made so far. The community has also welcomed the improvements.
One resident, Christo Steenbok, who has been living in his house for 15 years, said: “Compared with how it looked before, we are really happy with the new ceiling. It’s a blessing and we thank the City for this.” Another resident, Surefah de Klerk, said: “We are very happy and grateful for this. Before, we had many problems with leaks. I really appreciate that the City is fixing this.”
“This large-scale retrofit project has health, social, and environmental benefits. It will also improve residents' quality of life, as well as the indoor and outdoor air quality, while also alleviating energy costs,” Mayor de Lille continued. “Underscoring our commitment to building an opportunity city, this project will promote skills development and local employment, since it is estimated that the ceiling retrofitting of the 8,000 homes will create around 800 job opportunities through the Expanded Public Works Programme. Our thermally efficient retrofitting programme also supports our climate change actions to improve energy efficiency through a reduction in carbon emissions and electricity consumption.”
Mayor de Lille went on to say that the 8,000 units to be retrofitted with insulated ceilings represent a reduction of approximately 5,600 tons of carbon per annum. Moreover, based on the current tariffs, residents in these 8,000 homes will save a total of R5,8-million per annum in electricity costs. She confirmed that the City will continue its mission of building a caring city and providing residents with quality services.
“While we will do all we can to assist those most in need, I call on residents to work with us and take care of their homes and surroundings so that we can make progress possible, together,” Mayor de Lille concluded.
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However, there is a massive stock of existing buildings which were designed and built without any particular focus on being energy efficient, in the days when our
electricity prices were among the cheapest in the world. This circumstance made mechanical heating and cooling a viable economic choice, and insulation an expensive luxury.
Much has changed since then. Electricity is now a scarce and expensive resource, and we need to look elsewhere to ensure that our buildings contribute to our health, productivity and comfort.
Given that retrofitting insulation in existing buildings to achieve an energy efficient building is excluded from current regulations, we can apply common sense and an economic cost/benefit approach to interventions for existing buildings. For this we need to understand the objectives.
Installing copious quantities of insulation does not necessarily result in lower building heating and cooling energy running costs. Insulation does not automatically reduce the cost of heating or cooling a space occupied by people. Rather, it is their own perceived comfort that dictates whether they want additional heating or cooling.
Adding additional amounts of building insulation results in a diminishing return in terms of reducing the total thermal transmittance (the more insulation you add, the less difference each added layer makes). Adding more insulation does add to the costs, however, and accordingly to the amount of time before you get your money back – if ever.
Why retrofit an insulated ceiling?
The amended National Building Regulations 2011 require fairly stringent interventions towards improving building energy efficiency, including building
envelope insulation of new buildings and dwellings.
An IsoBoard insulated ceiling used to convert an industrial space into a comfortable restaurant.
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Granted, each building is unique in character, in location, orientation, occupation, build quality and purpose. No one size fits all. And the human beasties that occupy the building are different too! We know there are physiological differences in our response to temperature and perception of comfort, based on factors ranging from gender, age, activity levels and clothing choices, to many others.
So is there a common sense solution, when we accept that there is infinite variability? What will make the most difference, to most people, most of the time?
You can start with your ceiling, and you probably need to add a thermal resistance, or R-value of 1.5 m2K/W, which in our product is the equivalent of 40mm thickness IsoBoard.
If you have a perfectly good ceiling, the market offers you many insulators to research and choose from to insulate above the ceiling, although we recommend IsoBoard.
If you want to replace a damaged or old ceiling, remove the ceiling to utilize loft space, or simply want to install great insulation that will give you a thermally comfortable space to live and work in, safely and easily, that will last as long as the building will, you need to consider IsoBoard. If you are concerned about the possible effects of moisture on a ceiling in a room, IsoBoard is a great solution, being effectively waterproof. And, of course, it’s paintable.
Fitting IsoBoard directly below a damaged ceiling will add thermal comfort to a room, reducing heat flow through the roof system, without the time, cost, stress and mess of removing the existing one.
The insulated ceiling can be installed at a lower height than the existing one, so as to reduce the volume of an area that is subject to heating or cooling. This is useful when adding a mezzanine office in a factory, for instance, or converting a warehouse space into a retail environment.
Adding insulation can also assist in creating a loft room in a home, utilizing the space available in the roof cavity.
Please talk to one of our consultants the next time you feel you can improve your home or office space by adding the comfort of true temperature control.
For more information, visit www.isoboard.com.
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IsoBoard ceiling installed in this beautiful bathroom.
Installation of an insulated ceiling.
How to fix between rafters when installing into a loft.
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ENERGY-SAVING
PROTECTION
SEALING
TILINGEnquire at your local building retailer or contact us directly:
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EVERYTHING UNDER ONE ROOFWITH OVER 65 YEARS OF ROOFING EXCELLENCE, COVERLAND HAS A SOLUTION FOR YOU.
When you think roofi ng solutions – think Coverland.
Energy-Saving The RadenShield™ range of highly refl ective (97%) aluminium roofi ng radiant barriers not only provides the benefi ts of a refl ective insulation, but is also waterproof and reduces the amount of dust in the roof space. RadenShield™ is a recommended component for compliance with the SANS 204 Energy Effi ciency in Buildings Standard. ProtectionTired of unsightly cracked mortar along your roofs ridge and hip-line, not to mention the damage caused by leaks when it rains? Replace traditional mortar ridging with our advanced dry-fi x, waterproof ridge and hip-line system which is not only aesthetically pleasing, but is maintenance free.
SealingOur innovative EasyFlash roof sealing solution is durable, easy to install and able to hold its own against all weather conditions for up to 15 years without maintenance.
Tiling Our extensive concrete and clay tile range has been meticulously developed to be durable in any climate, while aesthetically pleasing.
If you want to enhance the beauty of your home while ensuring its visual appeal and structural longevity, choosing the best roofi ng solution is paramount.
Beyond providing roof tiles that deliver both style and safety, we off er a range of products and systems to enhance and maintain your roof:
Since our humble beginnings in 1949, we’ve assisted millions of South African homeowners with our vast technical expertise and wide range of high-quality products.
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Noise reverberation in multi-purpose auditoriums is a common problem that can be unpleasantly loud and rather irksome. Datlink Insulation & Acoustics offers
a simple retrofit solution that is also cost effective – ThermocousTex Board.
In this case study, the ThermocousTex Board (made from recycled polyester recovered from waste carbonated soft drink bottles) were vertically suspended off steel wires spanning across the underside of the roof, and then ‘clipped’ onto the wire at equal spacing intervals, resulting in effective sound absorbing diaphragms.
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solves school auditorium noise problem
When this school needed help with unwanted noise reverberation in their auditorium, Datlink Insulation & Acoustics provided a simple yet
very effective solution.
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Director: Craig FussellCell: + 27 (0)72 903 6536
Tel: + 27 (0)861 328 546Email: [email protected]
African manufacturers and suppliers of insulation and acoustic products produced from recovered & recycled polyester, PET (coke bottles, water bottles etc.)
Eco-friendly thermal and acoustic insulation products with excellent thermal and acoustic properties.
Eco-friendly polyester insulation blankets with excellent thermal properties.
APPLICATIONS: All buildings requiring effective thermal insulation.
APPLICATIONS: Train stations, film studios, casinos, schools, airports, conference centres, domestic churches etc.
www.datlink.co.za
These acoustically absorbing boards substantially reduced the reverberation times within the auditorium to acceptable levels.
The environment is much improved and is now suitable for school assemblies, school productions, sporting events and music concerts where normal voice tones and easy listening (without extra exertion) is achieved.
For more information, visit www.datlink.co.za.
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A thermally bonded polyester board manufactured from recycled polyester fibre, it is ideal for domestic, commercial and industrial ceilings when acoustic and/or thermal insulation is required.
• Width: 600mm, 1,200mm• Length: 1,200mm, 2,400mm• Thermal Conductivity: 0,034 W/m.K• R-Value: 25mm – 0,74m².K/W
35mm – 1, 03m².K/W 50mm – 1, 44m².K/W
• Density: 50kg/m³, 80kg/m³ & bespoke• NRC Value: 0.7 - 0.9• Complies to SANS-428 Fire Standard; Test reports;
35mm Plain Board - FTC 15/004(a) 2015/07/07 B/B1/2/H only
From design concept to the completed structure, the MiTek 20/20 suite of programs caters for all aspects.
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solutions for great structuresThe MiTek 20/20 Roof Design package is the market-leading software of its
kind. The software is the product of 15 years’ market-driven development and it continues to evolve in this rapidly changing industry and hardware platforms.
By utilizing the immense flexibility and power of the 20/20 Layout component of the software, the designer enters the building parameters and then uses the comprehensive plane and frame solving tools to detail the trusses, using 2D input accompanied by real-time 3D visualization.
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The Engineering program component analyses the individual truss profiles, applying the correct loads and load case combinations. This also gives the user the power to create or modify the most intricate structures to suit special requirements or loads.
Comprehensive manufacturing details generated for printing (job cards) or CAM output generated for automated saws and jigging. These ensure high accuracy and efficiency in the final assembly/manufacturing process.
Pictured above: Affies High School Club House
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MITEK 20/20 OFFERS THE TRUSS MANUFACTURER A COMPLETE ROOFING SOLUTION WHICH INCLUDES:
• Project Management• Comprehensive Truss Design• Computer Aided Manufacturing (CAM) Output• Complex & Flexible Roof Input• Project Costing
THE NON-COMBUSTIBLE SOLUTION.
Mediclinic Centurion – SAISC Steel Awards winner 2015
Zambezi Shopping Mall – SAISC Steel Awards winner 2010
Super Spar, Brighton
To ensure you get the best possible roof structure, insist on a MiTek roof structure.
FOR MORE INFORMATION CONTACT: (t) 011 237 8700 (e) [email protected] (w) www.mii.com/southafrica
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creating the advantage
The low mass per m2 (between 2-10kg) of this roofi ng system ensures both savings on the supporting structure as well as on transportation and erection costs whilst also being vermin proof and non-combustible.Large sections of the roof can simply be pre-assembled on the ground and hoisted into position on the walls – making this one of the most viable systems with a large range of applications up to a clear span of 40m.
Supported through a substantial network of licensed truss suppliers, Ultra-Span is equally ideal for all local and export applications where it can be pre-assembled or site assembled.
The non-combustible solution.
LIGHT GAUGE STEEL
MiTek Park,754 16th Road, Randjespark, Ext. 34, Halfway House,1685. Midrand (Head Offi ce) Tel: + 27(0) 11 237 8700Cape Town Tel: 021 905 0244 • Durban Tel: 031 700 6332 • Port Elizabeth Tel: 041 581 7525email: [email protected] • www.mii.com/southafrica
*MiTek Industries South Africa (Pty)Ltd, a division of the worldwide MiTek Group.
Aggressive poaching is pushing rhinos closer and closer to the brink of extinction. One of the many tragic fallouts of the poaching crisis is the orphaned young
rhinos that are left behind after their mothers have been killed. A rhino calf depends entirely on its mother for food and protection from predators, and losing its mother in infancy often has a deadly outcome.
The survival of calves can be maximized with ethical rehabilitation to ensure that they can be released back into the wild. Unfortunately there is a countrywide shortage of facilities with the capabilities required to rear and rehabilitate rhino. As a result, we are losing young rhino that could have been saved.
In response to this need, a unique partnership has been formed between The Lawrence Anthony Earth Organization (LAEO), Thula Thula private game reserve, and the local communities represented by their respective chiefs – the Fundimvelo Community Conservation Trust.
The Fundimvelo Thula Thula Rhino Orphanage (FTTRO) is a care facility designed with guidance from world-renowned rhino expert, Karen Trendler, and LAEO. FTTRO not only addresses the physical needs of orphaned rhino, but also nurtures them mentally and emotionally to ensure that they are fully rehabilitated back into the wild. The effectiveness of rehabilitation procedures is very high – the survival rate of young animals returned to nature stands at about 97% three years after their release.
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supports first rhino orphanage in KZN
When the Fundimvelo Thula Rhino Orphanage asked Ampa Group for help in the construction of a new neonatal care facility, there was no hesitation.
With MODEK® polycarbonate roof sheeting installed, baby rhinos can receive care in an environment most comfortable and natural for them.
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AMPA GROUP TO THE RESCUE The orphanage is funded entirely through the generosity of individual benefactors and corporate sponsorships. A recent plea to Ampa Group for MODEK® Polycarbonate roof sheeting to construct additional undercover bomas and a neonatal care facility was met with great support from Ampa Group’s management team.
In the blistering Zululand heat, Gary Cooper from Ampa’s Durban branch made the long trip to the facility, to inspect the site and consult with the construction team. The team was particularly concerned about light transmission and preserving a natural environment for the rhinos. The donated MODEK® polycarbonate roof sheeting was selected to best comply with the above requirements and to ensure that the roof sheeting will keep the orphans comfortable for years to come. The neonatal care facility, with the existing building structure being round, was especially challenging. But MODEK® polycarbonate roof sheeting is easy to cut and also available in several profiles, allowing for easy matching of existing metal sheets.
The management and staff of Fundimvelo Thula Rhino Orphanage have expressed their sincere appreciation to Ampa Group for their generous donation to the construction project at the facility.
For more information about the rhino project, call Yvette Taylor from LAEO at 031 266 2024 or email [email protected].
The rescue and rehabilitation of orphaned rhino requires a skilled team committed to providing specialized care 24 hours a day. It is a huge undertaking with high risk and cost. Facilities need to be strong and secure to accommodate the fairly large and in most cases traumatized and
uncooperative ‘patients.’
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During the re-roofing process, the roof is at times open or exposed to the elements. Also, there is the potential hazard of the workmen at height
inadvertently damaging assets and inconveniencing tenants who are occupying a building. Recognizing a market need, Scheltema designed and engineered the Scheltema Spacer System, which makes it possible for a new roof to be installed on top of an existing roof.
With this system, all roof sheeting is left in place and the installation team therefore has a safe platform from which to work. Spacer brackets are manufactured to length according
to the insulation requirements and pre-installed whilst ensuring that the roof remains watertight. Once all the spacer brackets are installed and aligned, the fixing bars are secured. Finally, the selected insulation and roof sheeting is installed.
The ‘over-roof’ application is of particular interest and offers commercial benefit to shopping centres, production facilities, property owners and property managers. The solution halves the time of a traditional roof replacement and prevents disruption and potential consequential damage to property. The result means reduced risk and no loss in production, trading and rental.
Spacer system revolutionizes roof
replacementThe traditional roof replacement process does not have to pose inherent risk to property owners and tenants, thanks to a bespoke spacer system
that allows for safe and efficient re-roofing.
Step1 – Spacer brackets installed above existing purlins.
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SELECTED FOR TYGERVALLEY SHOPPING CENTREThe project engineers of the Tygervalley Shopping Centre Roof Replacement Project selected the Scheltema Spacer System for the task. During the replacement process of the entire 50,000m² roof and skylights, the shopping centre remained fully operational. The System maximizes the thermal properties of uncompressed bulk insulation that was installed, resulting in a significant reduction in the Centre’s energy requirements.
An added benefit, and in this case the key driver of such an installation, is the improved insulation provided to a building. Scheltema’s solution revolves around a spacer system that is essentially a raised structure upon which new roof cover is installed. The space between the existing and new roof introduces the potential to completely re-insulate the building. Bulk insulation installed in this space offers significant energy savings, as the insulation does not compress, thereby allowing it to perform to specification and comply with SANS10400-XA requirements.
Scheltema’s System comes with an independent engineer’s sign-off at key milestones during the installation. It is a locally designed and manufactured product and provides significant cost savings compared to market alternatives.
For more information, call Marcellus Finlayson on 021 638 3121.
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Step2 – Fixing bars attached to fixing brackets.
Step3 – Selected insulation and roof sheeting installed. Approaching the final outcome of the Tygervalley re-roofing project.
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In this, the first instalment in a three-part series of articles by the Southern Africa Stainless Steel Development Association (sassda), we learn more about the many qualities
of stainless steel and why it can rightfully claim a firm place in today’s market as a roofing material of choice.
When the Chrysler Building and its art deco ‘sunburst’ roof profile and spire was completed in 1930, it provided mute yet commanding testimony to the aesthetic and longevity attributes of the world’s only man-made noble metal – stainless steel. This was the first major use of stainless steel in architecture (the Nirosta chromium-nickel alloy having been introduced in America just three years earlier). At that time, the long-term endurance of the metal was unknown. The alloy was similar to today’s 304. In fact, a lower alloyed version: 16.5/7 (16.5% Cr and 7% Ni) versus 18/8.
WHAT, EXACTLY, IS STAINLESS STEEL?Whereas steel is an iron and carbon alloy, stainless steel is a steel that contains at least 10.5% chromium, other alloying elements, and less than 1.2% carbon. The chromium content provides stainless steel with its corrosion resistance, enabling the natural and continuous development of a chromium-rich oxide surface layer. This oxide, referred to as the ‘passive layer,’ provides it with lasting protection against all types of corrosion. This passive layer is naturally self-healing when oxygen is present. Corrosion resistance is increased with higher chromium levels and, additionally, through the addition of molybdenum.
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– Part 1The potential for stainless steel as a roofing material was first unlocked
when it was used on such iconic structures as the Chrysler Building in New York. Since then, factors such as the introduction of low reflective, matt finishes and the development of improved methods of construction have played an important part in the growing appreciation of this metal as an
architectural material.
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Walt Disney Concert Hall. Photograph by: Philipp Rümmele
The presence of nickel improves formability and weldability. Stainless steels that contain nickel ‘work harden’ when cold formed, thereby giving the fabricated section additional structural strength.
The most commonly used stainless steels have a chromium content of 17%—18% and a nickel content of 8%—10.5%. This is why articles manufactured from the alloys are called 18/8 or 18/10. These chromium-nickel grades are called austenitic stainless steels.
Another family of stainless steels alloyed with chromium and other elements such as titanium, are called ‘ferritic’ grades. There are more than 200 grades of stainless steels.
For roofing purposes, 12%—17% chromium grades with metallic or organic coatings may be used.
STAINLESS STEEL – THE SURPRISINGLY IDEAL ROOFING MATERIALStainless steel is a highly versatile material, offering both owner and architect an attractive combination of benefits over the lifetime of a building. These include durability, safety, low maintenance, low weight, versatility, finish, recyclability, application, and economy (life cycle benefits).
DURABILITY: Stainless steel is corrosion resistant, allowing its use in even the most severe atmospheric conditions. It has high strength resistance and excellent resistance to thermal shock. It will outlast virtually all other roofing materials.
SAFETY: The austenitic stainless steel grades most frequently used for roofing have a higher melting point than many other roofing metals, providing additional safety. The melting point of stainless steel is around 1,500°C, which is higher than aluminium (660°C) or copper (1,083°C). They also retain a higher proportion of their strength above temperatures of about 550°C than carbon steels, and a higher degree of stiffness at all temperatures.
LOW MAINTENANCE: Maintenance costs continue to increase. This should be borne in mind from the planning stage of a building. Because of their long-term corrosion resistance and smooth surface finishes, most stainless steel roofs require very little maintenance (when well designed and correctly erected).
LOW WEIGHT AND VERSATILITY: The high mechanical performance of stainless steel allows for a typical thickness of material lower than for most other metallic roofing materials. This may result in a lighter, more cost-effective supporting structure.
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Chrysler Building. Photograph by: Tony Hisgett
Former World's Tallest Building the Petronas TowersPhotograph by: Tom Ravenscrodt
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The following summary is from the British Stainless Steel Association in its article, ‘The Growing Market for Stainless Steel Roofing’:
Stainless steel is not usually thought of as a lightweight material. However, the strength of stainless steel can be significantly enhanced through work hardening, either in the process of cold rolling or profiling. Typical thicknesses for stainless steel for roofing can therefore be as thin as 0.4mm, making it a viable option for lightweight applications. Despite work hardening, austenitic stainless steels will retain sufficient ductility to allow bending and forming into roof panels and accessories.
Stainless steels offer other physical properties, which are beneficial to roof design. The standard austenitic grades are tolerant to the climatic extremes from temperatures below freezing to temperatures above 35°C. Stainless steel’s smooth reflective surface provides it with excellent heat reflecting properties. It can also contribute to electromagnetic shielding, which may be required for buildings with sensitive electronic equipment.
FINISH: Stainless steel is best known for its aesthetic qualities – specifically, its bright, reflective appearance. However, a low reflective or matt finish is often preferred for roofing, both to reduce reflectivity and to blend in with ‘traditional’ materials. Coatings, either containing a combination of 80%—85% lead and 15%—20% tin or containing tin only (so-called Terne coatings), are a popular choice. Stainless steel with a polyvinyl fluoride (PVF) resin coating, or alternatively coloured by the Inco process, has proved a popular choice in Japan and other parts of Asia, and is now also found in Europe.
Of course, when functionality is paramount, the most obvious choice would be a 2B finish, which is smooth, flat and rather reflective. A rule of thumb is that the brighter and smoother the finish, the better the corrosion resistance and the easier the maintenance.
However, should low reflectance be required (for example, near airports), a dull, matt finish may be obtained by a cold-rolling process, by blasting with a non-ferritic, benign granulate,
or by colouring the stainless steel with a PVDF coating, or by an electrolytic chemical process (to produce a metallic-look in gold, bronze, blue, green red or black).
RECYCLABILITY: Stainless steel is the ultimate ‘green material.’ It is infinitely recyclable and recycled. Within the construction sector, its actual recovery rate is close to 100%. It is unchangeable and totally inert with regard to the environment. In contact with elements such as water, it does not release compounds which could modify the composition. The longevity of stainless steel fulfils the requirements of sustainable construction (e.g. THQE and BBC).
APPLICATION: Stainless steel is suited to all styles of roofing (batten rolls, standing seams, self-supporting trays). It allows architectural creation, design and the realization of complex shapes. It combines easily with other materials such as glass, wood or concrete. And, its low thermal expansion coefficient allows the manufacture of continuous lengths of up to 20m (allowing the use of productivity-enhancing on-site mills).
ECONOMY: Cost levels of stainless steel transformation are comparable with other ‘traditional’ metals. The cost of stainless steel roofing offers excellent quality versus price ratios in construction. Choosing stainless steel offers a long-term guarantee.
The next article in this three-part series will focus on architectural qualities, compatibility with other materials, formats, roof design (including ‘green’ roofs), and application methods.
For more information, visit www.sassda.co.za.
ACKNOWLEDGEMENTS: Southern Africa Stainless Steel Development Association (sassda): Architectural presentation; 2015
Euro Inox ‘Technical Guide to Stainless Steel Roofing’ - Building Series, Volume 5; ISBN 2-87997-016-4; 2004
Outokumpu ‘Handbook of Stainless Steel’; 2013
Aperam Stainless Europe ‘UGINOX - The advantages of stainless steel in roofing’ - Brochure; 2014
British Stainless Steel Association ‘The Growing Market for Stainless Steel Roofing’ - Brochure; 2004
Columbus Stainless, Roofing Article, 2014
FabricatorsSheetersErectors
Tilers
Leaders in Roof Truss Technology
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St Louis Gateway Arch. Photograph by: Francisco Diez
FabricatorsSheetersErectors
Tilers
Leaders in Roof Truss Technology
The Pink Panther TM & © 1964-2015 MGM Studios Inc. All Rights Reserved.
Tel: (011) 903 7080/1/2/3/4 | Fax: 086 634 7850 E-mail: [email protected] or learn more on www.gissa.co.za
Global Innovative Building Systems
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A 2,800m² project, the final decision was based on the fact that this roof covering requires minimal maintenance, is easily
installed, has many long-term benefits, but most of all...it offers something completely different!
Management from Global Innovative Building Systems and an overseas representative from the manufacturing company visited the completed school in June this year and felt humbled at experiencing the absolute joy and excitement of the pupils and teachers. Aesthetically pleasing, the roof adds a new dimension and a real sense of upliftment within the community. “Their sense of pride certainly pulled at our heartstrings,” says managing director, Tammy Bywater.
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Roofing shingles – making the difference!
After much deliberation on which roofing product to use on the Tiyimeleni Primary School building in Bushbuckridge, Mpumalanga, the Department of Education nominated Global Innovative Building Systems
to supply the shingle roofing system.
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The quality and standard of installation is a key factor to the success of the product and has always been the focus of Global Innovative Building Systems, allowing the company to complete various schools and over 500 other projects countrywide, and providing the opportunity to work on larger type developments to satisfy the market’s needs for a sustainable roofing solution.
Global Innovative Building Systems promotes skills development in rural areas by providing professional onsite training for the installation of the shingle roofing system according to the manufacturer’s specifications.
FOR MORE INFORMATION:
Global Innovative Building Systems(t) 011 903 7080/1/2/3(e) [email protected] (w) www.gissa.co.za
OWENS CORNING SHINGLE ROOFING SYSTEM EXCLUSIVE CHARACTERISTICS:
• Aesthetic appeal• Wind resistance up to 150km/hour• Range of colour choices• Excellent colour fastness• Cost effectiveness• Thermal efficiency• Lightweight (22kg/m²)• Low maintenance• UL A1 Fire rating• High UV Resistance• 11° minimum pitch• Security
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In addition, their wall template file has been significantly updated to incorporate a number of important additions and revisions. The template now includes detailed
components that will assist architects in specifying Gyproc drywall systems.
The Saint-Gobain Gyproc material calculator is compatible with Autodesk®Revit® and was developed to provide designers with estimated quantity of materials and installation times per system, where BIM level 2 (a managed 3D environment held in separate discipline ‘BIM’ tools and data attached) may utilize 4D construction sequencing and/or 5D cost information.
The updated Saint-Gobain Gyproc template sees the addition of keynotes to all components, and the inclusion of a repeating detail function, e.g. Studs at 600, 400, 300 c/c. The templates have also been updated to include four additional Saint-Gobain Gyproc wall systems.
The Saint-Gobain Gyproc template, first developed for Revit® software in 2013, is now a library file of 28 standard drywall systems and Donn UltraSTEEL frameworks that specifiers can access at any time.
The template offers information that will increase the specifier’s knowledge of the Gyproc systems and components, including details on their fire and acoustic performance ratings and associated colour coding of all systems and frameworks.
Included in the template are 2D drawings of the drywall layout, typical base details, and typical head details. The details can be presented in a pre-loaded drawing sheet with adaptive performance criteria and drawing number.
The template has tags (short descriptions) for use in annotation of drawings, while more readily allowing the integration of the systems into the specifier’s drawings.
The add-on material calculator and revised Drywall Revit® template file will offer assistance through the design, development, tendering and scheduling stages. Both are available from the website.
For more information, or to complete the download, visit www.gyproc.co.za.
Gyproc is BIM readySaint-Gobain Gyproc has announced that the company is BIM (Building Information
Modelling) ready with the introduction of a material calculator developed for Autodesk®Revit®.
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Elegant Roofing designs and manufactures top quality timber structures for the residential, commercial and industrial sectors of the market.
WWe specialize in the construction of timber roof structures, the installation of roof cover, waterproofing and the A19 certification.
Call Us: +27 (0)21 931 1240 [email protected] www.elegantroofing.co.za
Forward-thinking and visionary – that’s Elegant Roofing
Since opening their doors a mere 15 years ago, Elegant Roofing has taken some very bold steps to expand operations and become a leading roofing company in the
Western Cape – creating an impressive number of firsts along the way.
Today, Elegant Roofing proudly offers their clients a comprehensive but convenient one-stop solution, from manufacture to installation, across the residential,
commercial and industrial segments of the construction industry. The development of a construction division has successfully created growth opportunities for Elegant Roofing to tender for all roofing requirements of their customer base.
As part of the company’s overarching goal of being able to supply clients with a complete roofing solution, Elegant Roofing established a waterproofing division. The foremost advantage to their customers soon became obvious: By contracting with Elegant Roofing, they only need to work with one company for a complete and watertight roof.
Then Elegant Roofing took another step to increase their geographic footprint and invested in a transport division with uniquely designed, purpose-built, long-distance trailers and trucks with cranes. Very soon their customers were getting even more value – improved service delivery to any viable destination. And that was not the end of the road of expansion for Elegant Roofing. They broadened their product offering to
include MiTek® Ultra-Span® light gauge steel trusses to better accommodate the various requirements across the residential, commercial and industrial segments of the market.
Still not done, Elegant Roofing then embarked on the manufacturing of timber roof trusses from BILIGOM® structural timber in the Western Cape, also supported by the MiTek roof structure design program. Elegant Engineering Services has, on several occasions already, successfully re-engineered steel roof structures into timber for shopping malls and also hospitals.
With these skills available, a logical follow-on was the design of timber frame houses, called Elegant Houses. Moreover, Elegant Roofing has fully evolved into a specialist company that also deals in timber structures and cladding, not only roofing.
Reflecting on their accomplishments to date, and hinting that there is still more to come, company director Dirk van Vuuren comments: “What we ask of our clients and potential clients, is to give us the opportunity to discuss their needs; but at the same time, challenge us with your requirements.”
THOROUGH INSPECTIONOptima Coatings employed a meticulous approach, conducting several thorough inspections over a period of three months. The company identified the main cause of the leaks and other breaches in the integrity of the roofing system as an extremely low-pitched roof (under 2 degrees). This was causing the ponding of water, combined with high wind loading that was damaging the sheeting and ridges and also moving ponding water underneath the ridges and sheeting.
Optima Coatings’ assessment indicated that a total waterproofing solution was going to be required for the 0.8mm Klip-Lok roof sheeting, including its side cladding, parapet walls, ridge fixings, roof sheet overlaps, flashings, drains and air vents – all of which presented their individual application challenges.
WATERPROOFING SOLUTION Optima Coatings determined that the Agrément SA approved Optiflash Waterproofing System (Certificate 2014/464) would be a viable option to use for these applications.
This system is flexible; it waterproofs, and has a good puncture resistance and high tensile strength, which allows it to be applied between light- or heavy-duty roof cladding and walls, parapet walls, timber decks and concrete roofs. The Optiflash Waterproofing System includes Durasolve Primer HD, a high-adhesion bitumen primer, Durapol Membrane 150, and Durashield 850 topcoat.
• Durasolve Primer HD is applied in a one-coat application. It is a solvent-based, high-adhesion promoting primer solution of polymer modified bitumen. It is available in the colour black.
• Durapol Membrane 150 is a flexible, self-adhesive, polyester-backed elastomeric bituminous waterproofing membrane. At 1.5mm thick it comes in 15m-long rolls with available widths of 100mm, 200mm, 300mm, 400mm, 500mm, 600mm and 900mm.
• Durashield 850 HB is a two-coat application – a premium quality, highly elastomeric and UV-reflective thixotropic acrylic-based emulsion paint. It is available in a variety of colours.
Optima Coatings waterproofs Cape Town
Civic Centre When the City of Cape Town experienced multiple waterproofing issues on the roof of the Civic Centre, management approached Optima Coatings for
assistance. Their detailed approach provided a complete solution.
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PREPARATIONSPrior to applying the Optiflash Waterproofing System to the Civic Centre’s roof (which was done in accordance with the manufacturer’s instructions), the following process was followed:
• Stripping of existing waterproofing material All patches, strips and other forms of waterproofing systems that had previously been applied to the horizontal and vertical Klip-Lok roof sheets had to be removed or mechanically cleaned.
• Cleaning the roof OptiDegreaser®, diluted 10% in clean water, was brushed on with a stiff brush (a broom could also have been used) and left for approximately five minutes.
• High-pressure wash A high-pressure wash was done, with clean water, which ensured that all existing loose coatings were removed. Where necessary, scrapers, wire brushes and sanders were used to remove loose paint and contamination from the roof sheeting.
CORRECT WATERPROOFING • It is important that the Optiflash Waterproofing
System not be applied when rain is imminent. The surface to be sealed must be completely dry, with a moisture content of 15% or lower prior to application of the system. Any imperfections must be filled with a suitable filler.
• Both Durasolve Primer HD and Durashield 850 HB must be thoroughly stirred on site for three to five minutes with a flat paddle before application. Durashield 850 HB may be diluted with less than 20% potable water.
• Durasolve Primer HD should firstly be applied onto the prepared substrate with a soft brush, roller or spray gun.
• The Durapol Membrane 150 must then be laid onto the touch-dry primer (15 minutes to one hour) in manageable lengths to suit the roof and wall profiles.
• After application of the Durapol Membrane 150, two coats of Durashield 850 high-build acrylic topcoat should be applied, overlapping both sides of the Durapol Membrane 150 by 25mm on both sides.
• Drying time should be around four to eight hours minimum, at 23°C, with relative humidity of around 50%.
• The same batch number between the first and second coat should be used on substrates to prevent colour variation. Spot touch-ups are not recommended. The minimum timeframe that must be allowed between the coats is 24 hours.
• The coating can be applied using a soft brush, roller or spray gun, at an approximate rate of 0.8 kg/m2 per coat.
• Any damage to the membrane must be repaired with a pressure-sensitive tape in accordance with the manufacturer’s instructions.
PRODUCTS USED
OPTIDEGREASER: The Optima Coatings OptiDegreaser is a water-based, alkaline, heavy-duty degreaser and general purpose cleaner. It is highly effective in removing organic soils such as grease, oil, and tar from metals, polishes, waxes, plastics, ceramics and textiles. Environmentally friendly and safe to work with, OptiDegreaser is composed of a synergistic blend of surface-active agents and sequesterants.
DURASOLVE PRIMER HD: Optima Coatings’ Durasolve Primer HD is a fast-drying primer, compounded from the elastomeric tape adhesive. Use it on surfaces to be primed prior to the application of Durapol Membranes.
DURAPOL MEMBRANE 150: Durapol Membrane 150 is a flexible, self-adhesive, fibre-backed elastomeric waterproofing membrane. This product is ideally suited for quick and effective waterproofing of concrete and timber decks with a good UV protection once over coated with a water-based acrylic topcoat (like Durashield 850 HB).
DURASHIELD 850 HB: The Optima Coatings Durashield 850 HB is a premium quality, environmentally safe, energy saving, elastomeric, single-pack roof coating based on high-tech polymer chemistry formulations. Based on special acrylic polymers, it is ideal for dry substrate where it forms a seamless, joint free, water- and weathertight elastic membrane.
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ABOUT OPTIMA COATINGSOptima Coatings, a member of Duram (Pty) Ltd., is a South African company with a Level 4 BBBEE status. Optima Coatings offers a range of specialized industrial coating systems for use in high-risk environments especially for the South African construction and industrial markets: Waterproofing products, heavy duty anti-corrosive coatings, flooring systems, concrete repair mortars, joint sealants, and paint and protective coatings that are lead free. A range of technical on-site services are offered to clients at no cost.
Innovative technology and products have been developed to strict ISO 9001:2008 Quality Management Standards, with many products accredited by local and international agencies, including ASTM, Agrément CSIR (SA) and EU REACH, especially for the public sector - including housing, as well as construction and infrastructure.
Just a few recent projects completed by specialist Optima Coatings teams:
• Abbotsdale low-cost housing project• Transnet – Buffalo Bridge, East London• Department of Public Works – Prisons• Group 5 – Durban N3 Highway• Metrorail JHB – Pedestrian Bridges
CONCLUSIONUsing the Optiflash Waterproofing System had many benefits. It proved to be economical, was quickly installed, demonstrated high adhesion, and was highly flexible and easily moulded to the roof’s profile.
For more information, visit www.optimacoatings.co.za.
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CALL 0861 727 663 TO BOOK YOUR SPACE IN
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No other product has this performance! KLIP-TITE - ONLY FROM GRSDeveloped through continuous in-house testing of Klip-Lok 700, it was evident that failures occurred due to defl ection of the pan during high wind loads causing the sheets to disengage. The following improvements were thus developed:
• Transverse stiffeners were introduced in the pan, to achieve a balanced system design.• Transverse stiffeners reduce the defl ection of the pan, increasing the wind uplift resistance.• The ultimate wind-uplift resistance of Klip-Tite exceeds expectations.• Klip-Tite has retained the superb properties normally associated with Klip-Lok 700.• Transverse stiffeners are a fi rst in the South African sheeting market.
Talk to us, The Smart Roof People on 011 898 2900 or visit www.globalroofs.co.za or email [email protected]
GRSGLOBAL ROOFING SOLUTIONS
There is no approved or equivalent
Delivering the Exceptional Exceptional
GRS Klip-Tite
GRS Klip-Tite
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Diederik van 't Hof started Roof Rats (Pty) Ltd. in 2011, after he had to tackle the roof of his own home and realized there was a business opportunity lurking
within the dirt – no pun intended. Today, Roof Rats’ core business is the cleaning and vacuuming of ceilings and roofs. A successful enterprise from the start, the company has since expanded its services to include waterproofing, insulation and minor roof repairs, with some gutter-related products on offer as well.
The company serves the residential as well as the commercial and industrial roof markets. On any given day, Roof Rats cleans out an average of three or four private homes. Commercial and industrial work is great for business, and the company has completed a few huge projects, but would like to see an increase in the number of commissions. “People are starting to realize the health benefits of having their roofs cleaned and sanitized, but it takes time for the big corporates to have big buildings cleaned out,” van 't Hof explains.
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Be afraid. Be very afraid. All right – that is perhaps an overstatement, but at the very least you should be seriously concerned if you find yourself in the
unenviable position of having to contend with a filthy, neglected, unsanitary or infested roof space. In this instalment of our roofing matters series that talks
directly to the experts, Diederik van 't Hof, owner of Roof Rats, explains why – and why you should get professionals to take care of the problem.
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SA ROOFING: Should we be more concerned about what happens in our largely unseen inner roof spaces?
VAN 'T HOF: Absolutely. There are some terrible and life-threatening diseases that can be caused by old animal droppings and faeces left in the roof space. The diseases are not common, but we have definitely come across a few clients with serious health problems. For example, we’ve worked with people who had developed lung diseases that were caused by the spores emanating from old rat droppings. So yes, there is a relation between our health and the consequences of leaving the inside of an infested roof unattended.
SA ROOFING: What are the most common finds you make, and how would you rate them on a danger or threat scale?
VAN 'T HOF: One of the most common issues we sort out regularly, is the removal of old and broken insulation that has broken down or disintegrated down to tiny fibres that then filter into the house. These can cause some serious lung problems.
SA ROOFING: Are there seasonal considerations? Do you find some problems more prevalent in summer than in winter, for example?
VAN 'T HOF: Not really. We do find a heightened level of activity during spring season as rats, mice, birds and bats start to breed and nest. The dust and rubbish in the roof is not seasonal; it is an age-related issue. The older the house, the more accumulated dust and debris. An average 300m2 house of 30 or 35 years old will produce around 40kg of dust.
SA ROOFING: What has been the messiest job you’ve undertaken?
VAN 'T HOF: We were asked to clean out a block of council flats in Germiston, outside of Johannesburg.
The pigeons had been in the roof space for years. We had to use shovels to move the accumulated droppings. We filled a 6m3 skip from a ceiling area of 700m2. The staff used about five times the normal issue of face masks on that one.
SA ROOFING: What protective precautions do you take while working inside a ceiling?
VAN 'T HOF: The staff are all issued with new dust/face masks, every morning. We use an anti-bacterial mist spray to settle the dust and prevent staff breathing it in. We definitely slip on protective gloves when we encounter ‘weird’ stuff in the roof, and we also use eye protection as needed.
SA ROOFING: How does the process unfold once you receive a query from a potential client?
VAN 'T HOF: When a booking comes in, we will first arrange for a quotation. The size of the house or building plays a role in the pricing, as do any ancillary services booked. Once a quote is accepted, we require that a deposit be paid, after which a date for the service is scheduled. We try to keep it as simple as possible, and are very accommodating – we can have a turnaround time of 12 hours if necessary. On occasion, there are more severe or extreme situations where clients want our services the very next day, and we try to help as far as possible.
SA ROOFING: What is the one piece of professional advice you want to give our readers?
VAN 'T HOF: Don’t try it yourself! A domestic vacuum cleaner simply will not handle the job. In fact, and more than likely, someone will be falling through the ceiling!
For more information, call (011) 462 0209, send an e-mail to [email protected], or visit www.roofrats.co.za.
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In 1994 Lucas, then CEO of Lucas Quality Thatchers and now CEO of Jason Lucas Master Thatchers, appointed Liesl Schoonraad as his architectural consultant. “I realized that
we had to have someone capable of talking to clients and other designers who would understand their problems fully,” Lucas says. Today, 21 years later, they are still working together promoting thatch construction in South Africa.
Schoonraad, who developed a liking for thatch as a young child, had completed four years’ architectural design at what is now the Cape Peninsula University of Technology before she joined Lucas. Her in-depth knowledge of thatch’s potential has made her invaluable to the team, Lucas says, and she works closely with clients and architects, educating and guiding them on the possibilities that thatch offers.
“There are,” Schoonraad explains, “certain fundamental points about thatch which one has to grasp if the final design is to be really satisfactory. Its big advantage is that thatch does enable the clever designer to be very innovative.
Although it is true that many thatch users today still stick to the tried-and-tested Cape Dutch and Cape Fisherman Cottage styles, certain of the game lodges and hospitality buildings, not only in South Africa but elsewhere in Africa, have shown that thatch can be suited to modern avant-garde buildings of all sorts.”
GREEN POINTS AND MORE By using thatch, a beautiful space can be created within the roof space for a mezzanine level. And the floor area of a building can be increased dramatically by simply replacing a conventional tile roof with a 45-degree thatch roof. Depending on the width of the building, a loft space can be created completely within the roof, or the wall plate can be lifted minimally to increase the loft space. For improved ventilation whilst adding to aesthetics, dormer windows can be built into the roof. This brings building costs down dramatically when wanting to create extra space.
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Thinking thatch More people are considering thatch than ever before. Misconceptions about thatch roofs, which have daunted not only homeowners but designers as well, are steadily being ruled out thanks to more accurate information being shared by professionals
like Jason Lucas, South Africa’s only qualified master thatcher who studied in the UK.
Photographs: Jason Lucas Master Thatchers
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These and other aspects, says Schoonraad, make thatch competitive in price even when compared with traditionally inexpensive roofing materials such as IBR sheeting. Thatch requires no fascia boards or guttering system and no ceilings – to name only a few factors that add up to make thatch a very competitive roof finish when it comes to tight budgets.
Schoonraad points to another great benefit of using thatch as a finish, being that the City Council requires energy calculations on submission of any plan – and thatch scores high on the list of ‘green’ buildings. Not only is it a wholly natural and replaceable material, but its proven insulation qualities reduce energy consumption and enable the architect or designer to comply easily with the growing body of ‘green’ regulations.
“It must also be realized,” adds Lucas, “that thatch is not, as is often thought, temporary roofing. If the recommended refurbishment measures called ‘compaction’ and ‘overhaul’ are put into practice, the thatch will then retain its pristine look and will last almost indefinitely.”
As for thatch being a potential fire hazard, Schoonraad says that belief is outdated. The use of ceramic fire blankets inserted into the thatch and automatic drenchers systems reduce the fire hazard greatly. Using these fire retardants brings down insurance premiums as well.
Schoonraad is excited about the future of thatch in South Africa. She invites clients and architects to contact her should they need any assistance regarding thatch design – at no charge. “My job is simply to listen and to explain how thatch can be used to meet the needs of the client.”
For more information, visit www.jasonlucasmasterthatchers.co.za.
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Although changes have been designed to streamline and simplify the system, it must nevertheless be implemented carefully, and changes within companies
will need to be made over a period of three years to comply with the new ISO9001:2015 standard.
In a recent address to members of the Concrete Manufacturers Association, standards expert Christel Fouché, CEO of Advantage ACT and AGO Certification, elaborated on some of the more significant changes, starting with the shift of responsibility from companies’ quality management representatives to senior management.
NECESSARY FOR TRADE“In fact, quality management representatives are no longer an explicit requirement of the new standards, nor the requirement for compulsory procedures. Rather, businesses will be required to walk the talk and be able to prove the steps that are in place to ensure quality,” she said.
She added that auditors will also have to adapt and will be required to interview senior management at CEO and similar level in order to ensure that standards are being upheld. “While this may seem an onerous task, it is an absolute necessity for businesses as it is very difficult to do business without ISO9001 certification,” she explained.
Fouché indicated that the penalty for not maintaining proper quality standards can be severe, pointing out that damage to brands and reputations can far outweigh the cost of any financial losses that might be incurred.
FASTER TO IMPLEMENTThe new ISO9001:2015 standard has been developed on the foundation of the new Annex SL document. This document will set the new quality standard in line with ISO14001 environmental and OHSAS18001 health and safety standards and pave the way for easier implementation of integrated SHEQ management systems. As a result, the implementation and auditing of management systems will be run on a similar template, which will make it easier and faster to implement the different standards without duplication.
Although this streamlining will benefit companies in future, companies with existing management systems will be faced with a number of challenges, according to Fouché. “Firstly, the system will rely on input from senior management, so auditors will have to be comfortable communicating at that level. With the correct questions and information requests, however, CEOs and the management team should be able to show compliance.”
“Another challenge for companies that think they can run their quality management system as a ‘paper exercise’ is that the new system will need to be managed 365 days a year – and not just the week before an audit. New quality management systems will be more transparent and not as easy to fudge.” She added that quality will have to become “a way of life.”
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Significant updates to the ISO (International Standards Organization) ISO9001 quality management standard made this year will have a major effect on the way quality is measured and managed within companies across the globe.
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SUMMARY OF CHANGESAll those involved in quality assurance within an organization should make themselves familiar with the upcoming changes and start to prepare and implement adjustments as soon as possible in order to be ready for ISO9001:2015 accreditation in three years’ time.
Summary of changes to be verified and implemented by quality personnel and senior management:
• The system has changed to a higher level of management. • Core structure of quality standards is now in line with
environmental, health, safety and all other standards.• Several new clauses have been added and need to be
studied. • The system will follow a process approach.• Mention of preventative action has been removed as the
system should automatically take care of issues.• The term ‘product’ is replaced by ‘product or services.’• Mention of ‘continuous improvement’ has been changed to
‘improvement.’• Mention of ‘purchasing’ has been replaced by ‘externally
provided products and services.’• No longer refer to quality manual; documented procedure
and records have been removed. Specific reference to documented information is now done.
• Numerous wording changes have been made in order to make it easier to interpret.
• Three new informative annexes have been included.
Although not a requirement any more, Fouché still recommends that quality management representatives be maintained and that they work hand-in-hand with senior management to implement quality requirements. Likewise, she recommends that quality manuals not be thrown out, even though they are no longer a requirement.
"Remember, when you are out of quality, you are out of business," she concluded.
Christel Fouché of AGO Certification
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An EPD (Environmental Product Declaration) is an independently verified and registered document that communicates transparent and comparable information
about the life cycle environmental impact of products.
These EPDs come after Armstrong’s achievement earlier this year when it also became the first ceiling systems manufacturer in South Africa to achieve Green Building Council of South Africa Level A status in conformance with the Global GreenTag® scheme.
The EPDs were developed to ISO14025 standards, fulfilling the requirements for the international green building rating schemes Green Star, LEED and BREEAM, and apply to two of Armstrong’s mineral tiles:
1. Fine Fissured Board 600mm x 600mm and 1200mm x 600mm, Fine Fissured MicroLook-edged 600mm x 600mm, and Fine Fissured Tegular-edged 600mm x 600mm.
2. Dune Supreme Board 600mm x 600mm and 1200mm x 600mm, Dune Supreme MicroLook-edged 600mm x 600mm, and Dune Supreme Tegular-edged 600mm x 600mm.
The certification follows an independent life cycle assessment that reviewed raw material extraction and energy generation, raw material transport and the actual production of the mineral tiles – including packaging and disposal.
The Armstrong tiles were evaluated for renewable and non-renewable primary energy and the potential for global warming, acidification, eutrophication, as well as for photochemical ozone creation and ozone depletion.
The EPDs are available to view at: http://globalgreentag.com/certified-products-south-africa.
Another first for ceiling manufacturer
Armstrong World Industries has become the first ceiling systems manufacturer in South Africa to win Environmental Product Declarations
for its mineral tiles under the Global GreenTag® EPD programme.
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Anderson, who is currently consulting to a.b.e. Construction Chemicals, part of the Chryso Southern Africa Group, says both external and internal areas of
both residential and commercial properties require efficient waterproofing. "External areas are those areas exposed to the elements, and include roofs, balconies, and terraces. Internal areas include showers and bathrooms and, in commercial developments, gyms, showers, kitchens, water features and planter boxes," Anderson explains.
"There is little doubt that there are few things more annoying than a building that is leaking due to the failure or omission of the waterproofing installation. Interestingly, water ingress can only occur from one, or a combination, of the following reasons:
• Poor design;• Selection of inferior or unsuitable waterproofing materials;• Bad workmanship; and, importantly,• Damage to the installed waterproofing system.
“My experience commonly indicates that damage to an installed waterproofing system is the prime offender when it comes to leaks. Such damage is often caused by workers having scant regard for the waterproofing.”
“For example, often when television aerials are installed, the relative wiring is secured by nailing through the waterproofing. The fitting of lightning arrestors is another regular cause of problems. Hammering nails through the waterproofing system can have only one result: leaks.”
Anderson says input from experts should be sought for successful waterproofing. “A competent and experienced architect or designer, working with an efficient builder, will guide property owners through the pitfalls. The specified waterproofing system must be appropriate and made with the full knowledge of the substrate and what will be applied on top of it. Without this information, there will be a risk of failure due to the wrong materials being used in the wrong place.”
He adds, “Finally, the selection of the waterproofing applicator is important. The company selected should have a verifiable track record. As leading suppliers of waterproofing systems, a.b.e. Construction Chemicals could provide advice in this regard. The company's products have already waterproofed over 800,000 South African homes.”
Waterproofing does not have to be a problem. “By using quality and trusted materials, and paying attention to detail, a good result will be achieved," Anderson concludes.
Damage to waterproofing systems is major cause of leaksDamage to installed weatherproofing systems, along with poor design, are two of the main causes of leaks in buildings, says Gordon Anderson, one of
South Africa's most experienced waterproofing authorities.
A lightning storm. Considering these types of summer storms, waterproofing will be high on the priority list of property owners. But seek experts when it comes to system selection and installation, a.b.e. Construction Chemicals has advised.
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At this year’s 100% Design in Johannesburg, founder Adam Hoets showcased his designs in a variety of custom-built sizes and finishes: From a Protea to a
Fuchsia to a Moonflower, and from red to black-and-white patchwork, to a gradient of brass, copper and smoke.
PATENTED INGENUITY Creator Adam Hoets, a qualified architect, uses an original method of attaching ball-chain to laser-cut steel frames.
A tiny notch in the metal frame is the ingenious ingredient to creating a fastener-free curtain of chains. The result is a vast collection of intricate lighting designs that includes vibrant chandeliers and elegantly swaying pendants.
The Protea chandelier, for example, can be suspended or ceiling mounted. The ceiling-mounted version provides an option for people who don’t have the ceiling height to accommodate the suspended model, but would still love something beautiful for their space.
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for limitless lighting possibilities
South African lighting company willowlamp is known for its exotic designs inspired by nature and geometric patterns. But not only can one choose from an array of striking, unique designs, you can also choose your own
size, colours, or finishes.
Protea installed at The Searose Resort and Spa in Switzerland.
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The difference is simple: One uses a plate to mount directly to the ceiling, whereas the other has a suspension area – but the view from underneath is exactly the same in both versions.
INSTALLATION For illustrative purposes, the suspended installation process for the Protea 1000, specifically model P-HALG9 – FIX-MULTI (19), is shown here. Note that the installation must be done by a qualified electrician. Due to the weight of this lamp being approximately 26kg, at least two people should assist to ensure a safe installation. All other instructions as indicated on the official instruction sheet that is included with the product, must be followed.
STEP 1 Before lifting the fitting into place, make sure that canopy (C) is lowered, by loosening the grub screw (D). Check that the suspension chains are not catching on any of the stainless steel frames before lifting.
STEP 2 Lift the fitting and attach the ceiling hook (B) onto a shackle/hook in the ceiling – this shackle will not be provided by willowlamp.
STEP 3 Attach the Live, Neutral and Earth cables to the appropriate terminals.
STEP 4 Raise the canopy (C) to conceal the electrical connections and fasten by tightening the grub screw (D) until the canopy is secured.
STEP 5 With the lamp switched off, insert the appropriate lamps into the electrical sockets/lamp holders as required.
STEP 6 Turn on the switch and check that all the lamps are illuminated.
STEP 7 Occasionally some of the decorative chains may come loose during transportation. Check the packaging for any loose pieces and click them into the appropriated notch. If any chains are tangled, simply comb your fingers through the chain to remove entanglements.
COLOURS: Smoke, silver, copper, brass, rust, red, black and white. SIZES: Ranges from 80mm in diameter, currently the smallest design, to as big as six metres in length (the company’s latest project, commissioned by a hotel in Australia).ORDERS: Lighting orders have a 6 – 12 week lead time, depending on the size of order and complexity of design. Willowlamp’s unique works can be seen suspended from the ceilings of private homes as well as renowned hospitality, retail and commercial sites around the world.
For more information, visit www.willowlamp.com.
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Protea installed at The Ritz Carlton Chicago.
A view from underneath the Protea chandelier.
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Many more Timber related products, machinery and services.
BOOKNOW!
EXPLORENEW BUSINESS
OPPORTUNITIESAT AFRICA’S ONLY TIMBER MACHINERY, TOOLING, MATERIALS & FITTINGS EXHIBITION
9-11JUNE2016
Gallagher Convention Centre | Midrand | South [email protected] | +27 (0) 21 856 4334
www.woodexforafrica.com
Furniture & Kitchen production | Forestry & Sawmilling | Wood Materials, Machinery & Veneers Tools, Loggers & mobile Saws | Timber Construction and supply | Industry Surface & Treatment Technologies
Many more Timber related products, machinery and services.
NOV/DEC 2015 63
The Department of Energy’s Deputy Director General: Energy Policy and Planning, Ompi Aphane, while speaking at the Private Sector Energy Efficiency
conference, said the only way South Africa can succeed in addressing its energy challenges, is through cooperation and partnerships among all players. “Energy efficiency is recognized as one of the most cost-effective ways of improving energy security and shifting towards a low-carbon development,” he remarked.
In accordance with the 2005 National Energy Efficiency Strategy (NEES), a national energy efficiency improvement target of 12% reduction in energy intensity was set to be achieved by 2015. This overall national target is divided into sub-targets for each sector, including the public and commercial building sector at 15%. However, according to the Deputy Director General, the achievements of these targets have not been monitored by a recognized energy efficiency monitoring system, despite a monitoring methodology having been created in 2005.
Aphane referred to several initiatives that have been put in place to ensure energy efficiency, including the Industrial Energy Efficiency Programme – an initiative between the Departments of Energy and Trade and Industry and Business Unity South Africa.
According to Aphane, the department is aware of the funding constraints for energy efficiency programmes. “We are aware of the funding challenges that beset the programme, and we need to continue exploring all the options to sustain it.”
He said it is the responsibility of government, civil society, the private sector and the public at large to change how things are done in the implementation of energy saving programmes. The Department of Public Works has, for example, started implementing the Green Building Programme to support the implementation of energy saving programmes.
“Achieving this energy saving potential will require a change in behaviour and above all, a change in policy direction and the application of good practices at all levels of the energy value chain,” he remarked.
“The Gazetting of the Energy Efficiency Tax Incentive Regulations – in terms of the Income Tax Amendment Act, 2013 – will allow the private sector to claim tax rebates through the implementation of these energy savings measures,” he stated.
INFRASTRUCTURE, LOAD SHEDDINGAphane acknowledged serious challenges, especially in the power sector, due to a lack of timely investment in infrastructure. But he added that this is receiving the highest priority for urgent resolution. “The ability to provide adequate funding required for investments in energy efficiency has become a critical issue.”
Saving energy in the light of load shedding cannot be ignored. “We need to isolate the factors that inhibit efficient energy usage and provide a framework of incentives, disincentives and possible interventions that could be implemented,” he commented.
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Private sector crucial to solving South Africa’s
energy challengesAcknowledging energy efficiency as a cost-effective way of improving
energy security, cooperation with all players, including the private sector, is required to address our country’s energy challenges.
Globo Verde - Image by Olearys
This from Grant Pattison, Chairman of NRG Renew Africa, as he recently addressed scenarios and solutions for the energy crisis that South Africa and the SADC
(the Southern African Development Community) face. “The future of energy is changing,” Pattison explains. “Where South Africa used to have one large, centrally controlled transmission network, with the increase in gas and solar power and production efficiency high at the point of production, there is a very real business case for cutting the cost of transmission altogether and producing energy at the point of need.”
Both South Africa and SADC have significant natural energy resources. But due to the economic downturn, these countries are unable to effectively tap into many alternative energy solutions, meaning that they are trapped with coal as the primary energy resource and unable to keep up with increasing energy demand.
Marius Oosthuizen, Strategic Foresight Lecturer at The Gordon Institute of Business Science (GIBS), explains: “In research conducted on current factors affecting the energy supply, production, consumption and security in South Africa and SADC, there is a strong argument for a united regional approach to addressing energy challenges. South Africa has a prominent role in the SADC region, particularly in the way energy policies will progress in the future.”
One of the greatest challenges is the development of the required infrastructure to deliver energy solutions. South Africa’s current drive towards re-industrialization, which will support economic growth and job creation, is hampered by its ageing infrastructure. This infrastructure will require further investment to develop a sustainable energy solution that can deliver alternative energy solutions to meet its re-industrialization objectives.
The industry sector hit hardest by energy disruption has actually been the FMCG (fast-moving consumer goods) manufacturing sector. While mines can reduce operational capacity, the FMCG manufacturing sector can’t switch off without incurring costs associated with material waste as well
as production losses, not to mention that South Africa has a struggling manufacturing industry as it stands. Couple this with the plan for re-industrialization, and the country is at a departure point in its energy supply.
“Africa is a continent rich in both solar resources and in opportunity for distributed generation solutions, and the needs and interest of the South African business community in grid-resilient clean energy solutions is compelling,” said Pattison.
Governments in the Middle East and North African regions understand that smart grids are critical to future growth plans, and so these projects are largely state driven. “The real crisis in the energy space is going to be costs associated with the transmission network. Smart grids have to be part of Africa’s energy solution,” explains Pattison.
According to research conducted by GIBS, the energy challenges facing the continent can be set out into three scenarios: A baseline scenario whereby the energy landscape remains highly politicized, an alternative scenario whereby collaborative solutions between public and private enterprise deliver the solutions required, and a third whereby technology disrupts the entire energy supply chain.
“The alternative scenarios emphasize the need for a range of policy and governance commitments in addition to robust collaboration with the private sector, to leverage the economic opportunities available in the region,” explains Oosthuizen.
Picking up on public and private collaboration, Pattison says, “There needs to be a hybrid solution whereby there is central control over planning, but decentralized energy production, funded through government and private funding. There is now a mix of big utilities and small independently owned private companies. State-run utilities no longer meet all energy needs, and so distributed generation is the global trend for the future,” he concludes.
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Future economic growth in South Africa and SADC will require diverse energy sources and an updated infrastructure to ensure supply meets demand. As millions of new households consume power from national grids, coal-fired or nuclear sources will not be able to keep up with the pace. Alternative energy solutions
have to become part of the future energy mix.
NOV/DEC 201564
0860 000 AMPAwww.ampa.co.za