trivselhus uk benefits

1 BENEFITS OF TRIVSELHUS

TR IVSELHUS UKTHE BENEFITS OF TRIVSELHUS


The Trivselhus ‘Climate Shield’ is a construction system that delivers warm, comfortable, energy-efficient, long-lasting homes through a factory-manufactured closed timber panel system.

INTRODUC TION

The system is based on 240mm thick wall panels manufactured in Trivselhus’s factory in Korsberga, Sweden, to the precise design requirements of each project. Mineral wool insulation, pre-planned service ducts and high-quality Elitfönster aluminium-clad, triple-glazed, timber-framed windows are pre-installed by skilled operatives in the factory, making for high levels of air-tightness, minimal cold bridging and great ease of erection on site. Dwellings are typically erected on a simple pre-insulated concrete slab foundation. Panels are manoeuvred into position then screwed/nailed together, with each storey of wall panels forming a platform on which the next storey of wall panels sits. Exterior façade and roof materials are then added in situ according to the architectural specification. See diagram opposite.

Trivselhus is a wholly owned subsidiary of Södra, the largest forestry cooperative in Sweden with a membership base of over 51,000 forest owners committed to responsible commercial forestry and whose timber is exported worldwide. The slowgrown softwood used by Trivselhus is the highest-grade produced by Södra and makes for straighter, stronger and longer-lasting wood than that available from faster-growing trees. The precision manufacturing of the panels to order makes for very low levels of wastage, with all by-product recycled into other timber products, and with none of the on-site construction wastage associated with traditional construction.

The Trivselhus system has been used to build over 7,000 dwellings in Sweden and 300 in the UK and was one of the first proprietary building systems to employ Mechanical Ventilation and Heat Recovery (MVHR) systems as standard. In 2014, Trivselhus had a turnover of £80 million and employed 300 people, of whom 100 are skilled operatives, across three factories. Trivselhus’s core housing development business in Sweden has three main elements: bespoke, luxury homes custom-designed and built to order for private clients; its mid-range custom-build service, Movehome, and larger developments usually of 20-35 homes built for open-market sale (each of which typically includes several plots for custom-build).

01

BENEFITS OF TRIVSELHUS 3

13 MM PL ASTERBOARD

13 MM CHIPBOARD

BRICK WORK

BACKBOX

CONDUIT

195 MM INSUL ATION

INSTALL ATION ZONE WITH 45 MM

VAPOUR BARRIER

15 MM BITROC BOARD OR OSB

LOADBE ARING FR AMEWORK


Front elevation Side elevation

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**

Potential PV locations

Rear elevation Side elevation

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**


wc

hallliving

dining

kitchen

Ground floor

family

store

First floor

bed 2

bed 1

Landing

bed 3 en-suite

Bath

Store

Brook Furlong

Milton Keynes

House Type 21

GA Plans & Elevations

OCT 2014

1:100 @ A3

JA

Preliminary3130117 P2

DO NOT SCALE - ASK FOR DIMENSION

CTHIS DRAWING IS COPYRIGHT. ALL DIMENSIONS TO BE CHECKED ON SITEPRIOR TO COMMENCEMENT OF WORK. GHM PARTNERSHIP TO BE NOTIFIEDOF ANY OMISSIONS OR ERRORS. THIS DRAWING IS NOT TO BE SCALED.

GHM PARTNERSHIP CAN NOT BE HELD RESPONSIBLE FOR THE ACCURACY OFINFORMATION PRODUCED BY OTHERS FOR THE PURPOSES OF PRODUCINGOUR DRAWINGS I.E. TOPOGRAPHICAL SURVEYS. AREA MEASUREMENTS AREPROVIDED FOR INFORMATION ONLY. ANY VERIFICATION OF MEASUREMENTSSHOULD BE SOUGHT FROM A SUITABLY QUALIFIED SURVEYOR. GHMPARTNERSHIP CAN NOT BE HELD RESPONSIBLE FOR THE ACCURACY OFCOMPUTER SOFTWARE USED TO DETERMINE MEASUREMENTS.

DRAWN

CHECK

REVISION

PROJECT

DRAWING TITLE

DATE

SCALE @ A3

JOB NO.

STATUS

DRAWING NO.

REVISION DATE/DRAWN

USE ONLY FOR PURPOSE INDICATED BELOW

2 0 F I N K H I L L H O R S F O R T H L E E D S L S 1 8 4 D HT : 0113 239 0006 g h m p a r t n e r s h ip . c o . u kww w.

*

1 Brick (Red)

2 Brick (Grey/Blue)

3 Render (White)

4 Roof Tiles (Grey)

Denotes obscured glazing

Material Key

1

2

4

4

1

22

1

1

44

4

2

2

P1 Kitchen window height & 1st floor Layout amended 03/11/14 THSP2 PV's added to the roof & brick banding removed 10/11/14 THS

dining

KitchenHall

wc

Ground Floor Plan

Store

living

Front Elevation Variation 2Render

Front Elevation Variation 1Brick

Potential PV locations Potential PV locations

**

**

Side elevationRear Elevation


**

Bed 2

Bath

linen

Landing

First Floor Plan

Bed 1

Brook Furlong

Milton Keynes

House Type 20

GA Plans & Elevations

OCT 2014

1:100 @ A3

JA

Preliminary3130116 P2

DO NOT SCALE - ASK FOR DIMENSION

CTHIS DRAWING IS COPYRIGHT. ALL DIMENSIONS TO BE CHECKED ON SITEPRIOR TO COMMENCEMENT OF WORK. GHM PARTNERSHIP TO BE NOTIFIEDOF ANY OMISSIONS OR ERRORS. THIS DRAWING IS NOT TO BE SCALED.

GHM PARTNERSHIP CAN NOT BE HELD RESPONSIBLE FOR THE ACCURACY OFINFORMATION PRODUCED BY OTHERS FOR THE PURPOSES OF PRODUCINGOUR DRAWINGS I.E. TOPOGRAPHICAL SURVEYS. AREA MEASUREMENTS AREPROVIDED FOR INFORMATION ONLY. ANY VERIFICATION OF MEASUREMENTSSHOULD BE SOUGHT FROM A SUITABLY QUALIFIED SURVEYOR. GHMPARTNERSHIP CAN NOT BE HELD RESPONSIBLE FOR THE ACCURACY OFCOMPUTER SOFTWARE USED TO DETERMINE MEASUREMENTS.

DRAWN

CHECK

REVISION

PROJECT

DRAWING TITLE

DATE

SCALE @ A3

JOB NO.

STATUS

DRAWING NO.

REVISION DATE/DRAWN

USE ONLY FOR PURPOSE INDICATED BELOW

2 0 F I N K H I L L H O R S F O R T H L E E D S L S 1 8 4 D HT : 0113 239 0006 g h m p a r t n e r s h ip . c o . u kww w.

*

1 Brick (Red)

2 Brick (Grey/Blue)

3 Render (White)

4 Roof Tiles (Grey)

Denotes obscured glazing

Material Key

3

4

4

1

1

4

1

4

2

2

2

2

P1 Kitchen window height amended 03/11/14 THSP2 PV's added to the roof 10/11/14 THS


The Trivselhus system offers high performance and a holistically sustainable method of building.

PERFORMANCE AND SUS TAINAB IL IT Y

Key benefits include:

• a strongly ‘fabric first’ approach to sustainable construction – tackling energy usage and cost by eliminating demand rather than ‘greening’ the supply;

• a quality-controlled, zero-defects approach based on precision manufacture of the panels in a controlled environment;

• superior air tightness through detailed connectivity of wall panels;

• flexible construction to suit most architectural styles and building types - unlike most structural timber systems there are few constraints on design and no ‘standard’ panel sizes;

• use of a key renewable material – timber – and with less wastage owing to upsteam manufacture;

• high quality components – windows and doors – factory-installed as standard;

• rapid on-site assembly which reduces build time (and thus site costs), allows follow-on trades to start earlier in the build process, and reduces reliance on wet trades and vulnerability of programme to poor weather. Kit erection for a typical Trivselhus dwelling can be completed in 2-3 days, and the house will be completely weatherproof within 5-7 days, compared with rightly double that time for standard construction.

Trivselhus’s home market is in Sweden where homes have been built everywhere from cities to ski resorts, including in areas with annual temperature ranges from 25°C to -30°C – much more extreme than we face in the UK. The “Climate Shield” produces high levels of thermal performance and comfort as standard through the application of the same passive thermal design principles that underpin the ‘Passivhaus’ method. As the table below shows, the Climate Shield achieves technical performance well ahead of the current Building Regulations and approaching those of Passivhaus.

Trivselhus buildings also offer high levels of acoustic insulation, and panels can be sized to achieve higher-than-average ceiling heights of up to 2.7m which can have benefits in terms of the sense of volume, daylight and wellbeing conferred on occupiers.

Indicator 2010 Building Regulations Part L

Trivselhus ‘Climate Shield’

Passivhaus Standard

Floor u-value 0.22 W/m2k 0.15 W/m2k 0.11 W/m2k

Wall u-value 0.28 W/m2k 0.18 W/m2k 0.12 W/m2k

Window u-value 1.6 W/m2k 1.1 W/m2k 0.85 W/m2k

Roof u-value 0.18 W/m2k 0.18 W/m2k 0.12 W/m2k

Air tightness 5 m3/m2h <2 m3/m2h 0.7 m3/m2h

MVHR efficiency 50% 85% 85%

Heating energy 80 kWh/a 35 kWh/a 15 kWh/a

Total energy 120kWh/m2/yr 75 kWh/m2/yr 55kWh/m2/yr

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SOCIAL AND ECONOMIC B ENEFITS

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Compared with standard masonry or timber frame, Trivselhus’s airtight, thermally efficient building envelope creates a better controlled indoor environment

with a much lower space heating requirement; it is about investing in a high quality of construction that reduces operating and maintenance costs, making

it an attractive way of improving the whole-life value of a building.

The diagram below shows, using DECC data for the average three-bedroom UK home, the energy cost savings accruing from a Trivselhus building: energy costs based on normal conditions are more than halved, saving the household over £600 a year (before any further offsetting that may be possible through the exploitation of renewable energy incentives).

Such savings can be valued in a number of ways: for occupiers, they make for a straight saving; for landlords, they make it easier to offer bills-inclusive rent deals that trade off rent levels against energy cost certainty; and for developers building to rent they allow the running cost differential against a standard Building Regulations compliant building to be capitalised into additional construction cost headroom. These can be magnified by the use of renewable energy technologies which further offset energy costs and increase certainty of return.

Other economic benefits of building with the Trivselhus system include:

Average UK home

180 KWH/A£1230 PA

2010 Building Regulations

Climate Shield

Passivhaus

120 KWH/A£820 PA

75 KWH/A£595 PA

55 KWH/A£495 PA

• SALES VALUE PREMIUMS – houses built in the UK with the Trivselhus system have demonstrated a sales value premium on a like for like basis over comparable properties;

• PRICE AND PROGRAMME CERTAINTY – the lack of reliance on materials such as bricks of which price and availability often fluctuates increases cost certainty, and kits can be delivered to site when required on a just in time basis; and

• ECONOMIES OF SCALE – repeat orders for similar house types reduce the design and factory set-up overhead and allow unit costs to be reduced when dealing with large projects.


PAR TNERSHIP AND GROW TH

04

Trivselhus is committed to expanding its UK activity via partnerships with UK organisations with aligned interests, capabilities and ambitions.

Uniquely, Trivselhus is an ‘investor-supplier’: it recognises the value in investing directly in projects and ventures in which the Climate Shield is used, sharing risk and reward with development parters when appropriate, and being involved heavily in project appraisal and design, making use of the Trivselhus brand. This is in contrast to most timber systems suppliers which are contractor-led and supply driven and rely on developers to identify and specify a system rather than designing to exploit the potential of the system.

Once it has assembled a sufficient and sustainable pipeline, Trivselhus intends to establish a UK factory with the aim of reducing the transport costs of production (enabling the export of cut timber rather than finished panels from Sweden) and increasing supply capacity to the UK market, as well as creating a base of skilled operatives and erectors who can operate across the UK. Work is under way on business planning for such a facility.


THE TR IVSE LH US S YS TE M OFFE RS H IGH

PE R FOR M A NCE A ND A HOLIS TIC A LLY

SUS TA INA B LE ME THOD OF B U ILD ING

KEN FORSTER T: +44 (0)7 79 8924 801

W W W.TRIVSELHUS.CO.UK

trivselhus uk benefits

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