Timber Construction Magazine Issue 22 Winter 2022

22

WINTER 2022 www.timbermedia.co.uk ISSN 2515–8686 (PRINT)

CONSTRUCTION

ROTHOBLAAS  18 Why choosing the right certified quality materials is so important for your project WHAT NEXT FOR 2023?  12

TIMBER IS THE ANSWER  20

The recent TDUK Global Market Conference was cautious but upbeat about upcoming market prospects

Delivering a range of sustainable timber solutions to a busy design and build sector

Norbord is now West Fraser

New name.

Same products.

Our products and people continue to serve the housebuilding and construction industry with a wide range of wood panel products.

West Fraser trading as Norbord Europe Ltd.

uk.westfraser.com

TIMBER CONSTRUCTION  ISSUE 22 CONTENTS

02

12

14

02 News

20

18

The latest news and views from across the industry.

12 Timber’s Future Remains Bright The long-term future for timber construction remains bright despite turbulent times ahead, as the speakers at the recent TDUK Global Market Conference found out.

14 Record Returns at UKCW UK Construction Week Birmingham, made a welcome return to the NEC in October, with visitor numbers up 19% from last year.

22

18 Cover Story: Rothoblaas Rothoblaas offers a range of innovative solutions to support the growth of the Passivhaus sector and provides quality products for the most ambitious of timber construction projects.

20 Optimum Timber Performance

24

We spoke to John Maddock, co-founder and director of Sticx, to find out more about being a specialist provider of sustainable timber design and build options.

26

22 Free Form Flowing Timber A superb Free Form roof that could redefine the future of timber construction has been proposed for Sweden’s National Museum of Science and Technology.

24 Be Aware: Close the Door A third of the British public would not report a problem with a fire door, with a perceived lack of personal repercussions being one of the main reasons.

Managing Editor: Terry Hanlon

Registered address:

 terry.hanlon@timbermedia.co.uk

9 Viaduct Street, Newton-le-Willows,



01925 872371

Merseyside WA12 9PL

Artwork: Pete Awad  artwork@timbermedia.co.uk

26 Weathering the Storm: Moisture Effects on CLT Phil O’Leary, technical manager at BM TRADA, explores how moisture dynamics can affect the durability of cross laminated timber.

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 @Timber_Media

Wales. Company Number 10839173.

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TIMBER CONSTRUCTION  NEWS

BSW Group continues drive to educate and inspire industry

The UK’s largest integrated timber and forestry business, BSW Group,

Youngsters in Scotland were given an insight into how the timber

is gearing up for a busy end to 2022, with its commitment to supporting

industry can positively impact the environment, while also being given

STEM development continuing as students return to school.

the opportunity to visit a Tilhill harvesting site at Bainloch and the

Throughout the 2021-22 academic year, BSW Group members BSW

BSW Timber sawmill in Dalbeattie. The students were studying land

Timber and Tillhill, along with associated partners, hosted secondary

management and forestry as part of their new Rural Skills course and

school students at sites across England, Scotland and Wales to enhance

were hosted for the day by Tilhill and BSW Timber.

their understanding of the timber industry, with an emphasis on

Harvesting manager Iain McMurtrie and Tilhill colleagues were able

attracting young talent to the sector in the coming years.

to give students an insight into the planning and preparation that goes

Tony Lockey, BSW Group learning and development manager,

into managing a working forest, and how harvesting can be carried

stressed the importance of engaging with young people as they

out safely and effectively. There was time to get a close-up look at the

prepare to make decisions that could shape their future careers. He

modern machinery involved in this work and to talk to the team who

said: “What we offer at BSW is a fully rounded training package for our

were on site. Students were also shown how decisions are made about

apprentices, not just study in the classroom but hands on experience

re-planting. At BSW Dalbeattie the group found out more about the

with a range of jobs and opportunities. We build our teams through

high-tech sawmilling operation and how a tree is processed into sawn

robust succession plans and choose the right individuals to take our

timber products.

business onwards.”

Tony Lockey added: “A recent promotion saw several new Tilhill

BSW Timber and Tilhill have worked closely with the Scottish

graduates sign up for STEM Ambassador status. This is a fantastic way

Council for Development and Industry (SCID) and Young Engineers and

to promote our business to a wide range of individuals and inspire

Science Clubs (YESC) to deliver industry insights through the last 12

future timber and forestry workers. This often promotes the roles that

months. In April, 50 young people from primary and secondary schools

are available through site visits and demonstrations, bringing young

descended on Aberdeen Science centre for a Regional Celebration

people face to face with exciting new opportunities that many had

of STEM in partnership with BP and Shell U.K. Limited, and a further

never thought they would explore.”

90 students attended Dundee Science Centre for a Celebration of More at  www.thebswgroup.co.uk

Engineering.

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TIMBER CONSTRUCTION  NEWS

COP27 makes more sustainable forestry pledges

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Important progress on sustainable forest management and conservation has been made at the UN Climate Change Conference COP27 in Sharm el-Sheikh with the launch of the Forest and Climate Leaders’ Partnership (FCLP), which aims to unite action by

Cheshire Mouldings

Prowood

governments, businesses and community leaders.

The Partnership aims to boost action to implement a commitment

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made by over 140 countries at COP26 in Glasgow last year to halt forest loss and land degradation by 2030 and to convert ambition into results on the ground.

Sourcing for your next project?

A key report published this year by the UN’s Food and Agriculture Organization (FAO) – the State of the World’s Forests Report 2022 -

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highlights the need to step up action to unlock the potential of forests in tackling climate change and biodiversity loss.

Only by stepping up efforts to reduce deforestation and implementing other mitigation activities in the forest sector can the

Industry recognised, third-party accreditations

Paris Agreement goal of limiting global average temperature rise to 1.5

From wood coating manufacturers, specialised fixings to timber products and design engineers

degrees above pre-industrial levels be reached.

Twenty-seven countries, representing over 60% of global GDP and 33% of the world’s forests, have already joined the new partnership and are committed to leading by example on one or more of the FCLP’s action areas. These include mobilizing public and donor finance to

Get in touch and find a supplier today

support implementation, supporting Indigenous Peoples’ and local communities’ initiatives, and incentivizing the conservation of highintegrity forests.

President of the European Commission, Ursula von der Leyen, on behalf of the European Union, said: “Only with healthy forests can we

info@tdca.org.uk | 01977 558147

deliver on our shared climate commitments under the Paris Agreement.

And only with intact, lively forests can we address biodiversity.”

Government representatives meeting at COP27 announced that

The Timber Decking & Cladding Association is an independent, not-for-profit technical and advisory trade body. Recognised as the authoritative source of expert opinion in the UK.

of the $12 billion committed in Glasgow to protect and restore forests over 2021-2025, $2.67 billion have already been spent and that public and private donors have committed a further $4.5 billion since COP26.

To ensure accountability, the FCLP will hold annual meetings and

DeckMark and CladMark schemes require a full business audit and assessment followed by annual surveillance audits.

publish an annual Global Progress Report that includes independent assessments of global progress toward the 2030 goal, and progress

www.tdca.org.uk

made by the FCLP itself.

More at  www.un.org/en/climatechange/cop27

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TIMBER CONSTRUCTION  NEWS

Donaldson Door Systems rebrands from Rowan Manufacturing Scotland’s leading joinery manufacturer of door sets has a new identity. Following its acquisition by the Donaldson Group in 2020, Donaldson Door Systems (DDS) is the new brand of the business

that our customers will continue to benefit from the high-quality products

formerly known as Rowan Manufacturing Ltd (RML).

and services that the Donaldson Group is known for.”

Established in 1979 as the manufacturing arm of the Rowan Group,

Andrew Donaldson, CEO of the Donaldson Group, added: “The rebrand

DDS specialises in manufacturing, merchanting and supplying internal

completely aligns Donaldson Door Systems with the Group, along with a

and external door sets, as well as staircases from its site in Plains, North

new logo, branding and website. The response from everyone involved

Lanarkshire. Since its acquisition in February 2020, all colleagues and

in the rebranding exercise has been overwhelmingly positive and we are

operations have moved over to the Donaldson Group, with Managing

excited to see Donaldson Door Systems develop and build on the strong

Director, Luke Roberts, and General Manager, Billy Cameron, continuing to

foundations that were established in its 30 years of operation.”

drive the business.

DDS holds Secured By Design accreditation and is the only company in

Luke Roberts, managing director, Donaldson Door Systems said: “The

Scotland to be both Q Mark and Certifire certified. For 30 years, the business

rebrand to Donaldson Door Systems is an exciting new chapter for the

has been working with large housebuilders, local authorities and the domestic

company. Our people will move forward with the business as we hone in

market, supplying them with high-quality and fireproof doors and stairs.

on our market-leading door sets with safety and security front of mind. We More at  www.donaldsondoorsystems.co.uk

are proud to be a part of this trusted family business and we are certain

Architects and building control officers praise new RIBA-approved Part L CPD A RIBA-approved CPD helping builders,

the first to book the CPD, said: ‘The guys were

architects and building control officers

super impressed with the presentation. It’s nice to

negotiate the complexities of the revised Part

have a CPD that has answers. We will certainly be

L of the building regulations is transforming

using Actis products going forward, so thank you

the understanding of future homes standards

for enlightening us. You will be bombarded with

for those in the industry.

requests for calculations!”

Actis regional specification manager and

He praised the excellence of the content

co-author of the CPD, Amaret Chahal says the

and presentation, which gives guidance on how

by everyone we’ve presented it to. These have

latest Actis’ CPD, Tomorrow’s Insulation Solutions

to meet revised energy efficiency targets which

included architectural practices and LABC offices

for Future Homes Standards, has been praised by

see new build homes having to reduce carbon

around the country, many of whom, interestingly,

architects and building control officers getting to

emissions by 31% over previous levels.

had little to no preparation or awareness of the

grips with changes to Part L Created by insulation specialist Actis,

Architectural technician Ben Sayers from

new regs.”

MMA in Tyne and Wear, who took part in one of

The CPD looks at different tactics to help

has been opening the eyes of specifiers and

the many privately booked sessions, echoed his

achieve the greater goal of building net zero by

architectural technicians across the country

sentiments. “It was an excellent presentation,

2050, such as the increased importance of having

with its helpful breakdown of precisely how the

well delivered,” he said.

a ‘fabric first’ approach. It details ways to improve

changes will affect their day-to-day work. Take-

Actis regional specification manager and

U-values, reduce thermal bridging, address the

up of the free one-hour module has seen Actis

co-author of the CPD, Amaret Chahal said: “The

performance gap and improve air tightness. And

specification managers Amaret Chahal and Jason

number of enquiries we have received shows

to ensure these changes don’t create a problem

Docherty rushed off their feet travelling the

that people are turning to us in a time of need

in the other direction, it looks at how to ensure

country and sharing their expertise with other

and confusion, hoping we have all the answers.

there are no issues with overheating.

industry professionals.

We are happy and proud to say we were poised

CAD technician Nick Fisher from EK Architects in Pattiswick, Essex, whose team were among Timber Construction Magazine

and ready for all the new building requirement

More at  www.insulation-actis.com/

changes. The new CPD has been received so well

cpd.html

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TIMBER CONSTRUCTION  NEWS

Wood Awards 2022 on display – in miniature A free exhibition featuring the thirty-two shortlisted projects for this year’s Wood Awards will be on display at the Building Centre in London, from 31 October – 10 December 2022. Showcasing a stunning array of British architecture and design using wood, this special exhibit will feature building models from 14 of the shortlisted projects, allowing visitors to explore, in miniature, the evolution of intent that shaped the buildings.

The collection of models on display highlights the incredible depth of timber design talent in the UK, with the shortlisted buildings this year including stadiums, school halls, and private residences – which can be found from Devon up to Edinburgh. Visitors to the exhibit will be able to get a sneak peek into the daring wood designs found in the likes of ABBA Arena, the Sport’s Pavilion, Master’s Field, Homerton College Dining Hall and many more. Also on show will be information on all the furniture entries into the Wood Awards, which were front and centre during the Material Matters fair at London Design Festival.

David Hopkins, Timber Development UK chief executive, said: “It is really special to be able to bring these timber buildings in their miniature form to the general public for the first, and likely only time – you will be able see

Wood Awards recognises, encourages, and promoted outstanding wood

this wide an array of British design, architecture and ingenuity in one room.

design, craftsmanship and installation. Through the Wood Awards, we

Wood is the first choice for sustainable construction and product design, so

aim to continually encourage British designers and manufacturers to aim

not only will this exhibit be an opportunity for visitors to explore design, but

ever higher in the design world and showcase some of their incredible

also how this sustainable, replenishable material can help shape our future.”

achievements to a national and international audience.

The Wood Awards is the UK’s premier competition for excellence More at  www.woodawards2022.online

in architecture and product design in wood. Established in 1971, the

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TIMBER CONSTRUCTION  NEWS

Henry Brothers win award for University timber nursery

Leading construction company, Henry

The Woodlands Day Nursery and Forest

truly unique facility here at Staffordshire

Brothers, has been named winner of the GB

School, a single-storey building, is timber frame

University which as our greenest building,

& Republic of Ireland Construction Project

with timber cladding and features an external

forms a significant part of our green campus

of the Year Over £2.5 million category at this

timber canopy covered walkway for social

transformation and sustainability plans. As

year’s Construction Employers Federation

interaction. Set adjacent to a woodland, the

our first carbon neutral building on campus,

(CEF) Excellence Awards.

building features four inspirational learning

this facility will support the next generation

spaces enhanced with digital technology and

as well as communities, bringing the forest

Project of the Year Award for its completion of

a forest school provision. It is highly energy

setting to our city through teaching, learning

a £4.4 million woodland day nursery and forest

efficient, air-tight, and is targeting net-zero

and embedding our ambitions for a more

school at Staffordshire University. Ian Taylor,

whole life carbon.

sustainable future.”

Henry Brothers received the Construction

Managing Director of Henry Brothers Midlands,

Other sustainable features of the building

In addition to Henry Brothers, the

said: “We are pleased to have received industry

include REHAU earth tubes and air source

project team consisted of Mace as project

recognition for our very first carbon neutral

heat pumps which use passive cooling/heating

and cost managers, Feilden Clegg Bradley

project, representing a significant milestone

rather than mechanical ventilation; along with

Studios as lead designer and architect, Max

in Henry Brothers’ strategy to reach net zero

roof mounted solar photovoltaic panels to

Fordham as building services engineers,

carbon emissions by 2050. Congratulations

offset carbon emissions.

Civic Engineers as structural engineers and

must go to our exceptional staff which have

Sally McGill, Chief Financial Officer

transport consultants, and Re-form Landscape

delivered an outstanding modern nursery and

and Executive Lead for Sustainability at

as landscape designers. The Henry Brothers’

forest school on campus, with sustainability at

Staffordshire University said, “On behalf

design team included CPMG Architects,

its core. Henry Brothers is privileged to provide

of the University I would like to extend my

structural and civil engineer Hexa and Couch,

Staffordshire University with a truly future-

congratulations to Henry Brothers as winners

Perry, Wilkes for M&E services.

proof facility which will provide significant

of the award for Construction Project of

benefit to staff, students, and their families.”

the Year. Henry Brothers has created a

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TIMBER CONSTRUCTION  NEWS

Tanasote® answers Creosote problems The safety and environmental credentials of Creosote has been under review across Europe for quite some time. At the end of September 2022, the renewal of authorised applications for timber treated with Creosote was voted on by EU Member States, with the majority voting in favour of restricting authorisation even further.

From spring 2023, fence posts treated with Creosote will be banned from being placed on sale. The only authorised continued use for Creosotetreated timber is for railway sleepers and utility poles for electricity and

To prove real-world performance in the most demanding of

telecommunications. The positive vote to ban the use of Creosote to treat

environments, Tanasote® has been subjected to additional testing in high

fence posts across EU Member States was made on the grounds that

humidity and accelerated agricultural trials, as well as laboratory fungal

suitable and sufficient alternatives are available. One alternative that is being

studies. Extensive testing of water-repellent properties has also been

referenced by a growing number in the timber industry is Tanasote®.

undertaken. Other benefits include deep preservative penetration and

A modern hot oil-based copper wood preservative developed to protect

mobility in the Tanasote® treated timber, low odour, long-lasting water-

timbers in the harshest of environments, Tanasote® is an ideal solution for

repellence to minimise splitting and an innovative organic co-biocide to

agricultural and heavy-duty landscaping timber applications such as livestock

protect against a wide spectrum of aggressive decay fungi.

fencing, bridges, hop poles and retaining walls.

Dr Stephen Uphill, technical lead for wood protection – Americas and

With over a decade of research and development, Tanasote® wood

Industrial at Arxada commented: “If wood is to be kept as a primary material

preservative has been developed to deliver a service life of 40 years

of choice in important agriculture applications, the industry needs to be bold

plus, depending on commodity, desired service life, timber species and

and adopt modern and innovative BPR-authorised alternatives. Future wood

application. This modern alternative to Creosote was launched in Europe in

protection technologies should confidently deliver both high performance

April 2021 following Biocidal Products Regulation (BPR) authorisation.

and a lower environmental impact than other materials, such as steel and

To date, Tanasote® has been authorised for use in UC3 and UC4,

concrete. Tanasote® is an exciting and proven alternative that will meet

including poles and sleepers for at least 10 years – the maximum

these criteria. An innovative preservative system from our experienced

authorisation period under the BPR before re-authorisation. It has passed

development team, it is designed to meet the future needs of high-

all necessary environmental, human and animal health risk assessments, as

performance timber applications, such as those used in agriculture.”

well as generating extensive data to prove that it is effective against woodMore at  www.trusttanasote.com

destroying fungi and/or insects.

TDUK sign anti-greenwash charter Timber Development UK (TDUK) has signed up to The Anti-Greenwash

The policy sets out practices that

Charter as the next step in its sustainability journey. The Charter is

TDUK will follow to ensure all its

sponsored by the Alliance for Sustainable Building Products (ASBP)

communications comply with the

and requires organisations to make a public declaration to uphold

Anti-Greenwash Charter and

good standards of marketing practice, adopt a Green Claims Policy

also includes key definitions of

and, by doing so, adhere to the Government’s Green Claims Code and

green terms commonly used

Code for Construction Product Information (CCPI).

to describe timber and wood-

Having signed up to the Charter, TDUK has written a Green Claims

based products and services to

Policy to set out the standards it has committed to in its marketing and

help its members do the same.

communications. The organisation also requires all its members to abide

Charlie Law, Sustainability

by these standards:

Director of Timber Development UK, explains:

•

•

• •

Transparency: We commit to clear communication of what

“The importance of sustainability

sustainability benefit our product or service offers and not to conceal

is becoming clearer to industries across

or omit information.

the country, but we have all seen examples of misleading or false

Accountability: We substantiate our sustainability claims with

information within the built environment industry. We are determined

accurate, and regularly evaluated empirical evidence. We commit to

to ensure our members cannot be accused of ‘greenwashing’ and to help

sharing facts, figures and statements that can be checked.

to champion responsible marketing practices across the timber supply

Fairness: We commit to using fair, clear and unambiguous language

chain, which is why we’ve decided to sign The Anti-Greenwash Charter

when providing comparisons with other products or organisations.

and develop our policy and associated guidance to help our members,

Honesty: We ensure we make specific statements about our

and others in the industry make the correct claims.”

organisation’s sustainability efforts and that our actions match More at  www.timberdevelopment.uk/anti-greenwash-charter

those promises.

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TIMBER CONSTRUCTION  NEWS

English woodlands could have the construction answers A consortium of experts in timber

according to future availability, and timber potential

climate emergency, demand is growing rapidly for

construction and engineering is exploring

based on existing data, including more common

more sustainable construction approaches such as

ways to boost the use of English hardwood

species such as oak, beech and sweet chestnut, as

timber-based offsite design. By building a robust

forest products across the built environment,

well as birch, sycamore, ash, alder and willow, where

evidence base, we can inform future approaches

in a move which could significantly improve

existing research about their suitability is limited.

to forestry and woodland management across

the carbon footprint of the UK’s buildings and support diverse woodland ecosystems.

Kat Scott, sustainability and regenerative design

England that includes the species best suited for use

manager at dRMM, said: “By manufacturing viable

in the structure of buildings. At the same time, the

and scalable homegrown timber alternatives to

trees will sequester significant amounts of carbon,

for Technology and Engineering’s (NMITE) Centre

carbon-intensive materials, we are aiming to reduce

helping to reduce the environmental impact of the

for Advanced Timber Technology (CATT) – is funded

the UK’s reliance on imported products. Widening

built environment in the years to come.”

through the Forestry Commission’s Timber in

the range of species that provide a domestic wood

Construction Innovation Fund, designed to increase

supply could also provide a boost for localised

Centre for Advance Timber Technologies at NMITE,

the use of the natural carbon sequestering material

manufacturing facilities and supply chains.”

added: “This research represents a strategic

The project – led by the New Model Institute

Focusing on the use of timber in modern

in the built environment. Partners also include

Professor Robert Hairstans, director of the

convergence of England’s forestry, manufacturing,

dRMM Architects, Ecosystems Technologies,

methods of construction, partners will collate data on

and construction industries to drive the increased

Edinburgh Napier University and Built Environment

the potential strength grading of each species while

adoption of homegrown, renewable timber in

– Smarter Transformation (BE-ST).

also assessing the use of homegrown co-products

construction. By so doing we can inform future

such as wood fibre insulation. The three-year project

forest strategies to ensure resilience against pests,

suitability of certain species of English homegrown

could help to reduce the UK’s reliance on imported

diseases and climate change and be less reliant on

trees for their use in construction, looking at sawn,

construction materials, as well as providing low-

imported resources and the current monoculture

engineered, and mass timber products including

carbon alternatives to concrete and steel.

of commercial species.”

For the first time, researchers will examine the

Sam Hart, head of modern methods of

cross-laminated timber (CLT) and glue-laminated timber (glulam). The species will be chosen

construction at BE-ST, said: “As the UK faces a

More at  www.be-st.build

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www.kopperspc.eu | kpc.uk.sales@koppers.eu | +44 (0)1628 486644 ™ Protim Solignum Limited trading as Koppers Performance Chemicals. Koppers is a registered Trademark of Koppers Delaware, Inc. Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, Protim Solignum Limited gives no undertaking to that eect and no responsibility can be accepted for reliance on this information.

Information will be updated when the need arises. Please ensure you have an up to date copy. All products are produced by independently owned and operated wood processing facilities. All other trademarks are trademarks of their respective owners.

Koppers Performance Chemicals, Protim Solignum Limited, Fieldhouse Lane, Marlow, Buckinghamshire, SL7 1LS. Visit: www. kopperspc.eu, Email: kpc@koppers.eu, Call: +44 (0)1628 486644, Fax: +44 (0)1628 476757. Registered in England 3037845. © Copyright 2020.

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TIMBER CONSTRUCTION  NEWS

Arbor celebrates 70 years with bigger greener lorry fleet Arbor Forest Products has put sustainability at the heart of its new fleet of lorries, highlighting both the company’s drive for greener thinking as well as its ambition to help customers meet everincreasing environmental targets.

Successfully in business for over 70 years, Arbor supplies over

Arbor’s logistics manager, David Garbutt says: “We’re incredibly proud

500,000m3 of quality timber to the building, DIY and construction trades

of our Warehouse on Wheels concept, as it allows us to fulfil orders in a

every year from its 90-acre site in New Holland (North Lincolnshire). It

single delivery. This is not only great news for our customers, but better for

is the largest dedicated timber terminal and processing facility in the

the planet. It’s a win-win situation. Our ability to generate precise transport

UK. With 100s of orders to process every day, and large-scale logistic

plans means we can maximise our resources while maintaining our delivery

challenges a mainstay of the industry, Arbor has continued to look for

promise. We’re also using data to achieve more accurate, environmentally

greener solutions that optimise fleet utilisation, reduce carbon emissions,

beneficial route optimisations, so we’re expecting to see Warehouse on

improve efficiency levels, and replace existing manual processes.

Wheels improve further in the future.”

One of the results has been the creation of ‘Warehouse on Wheels’, a

Arbor’s Operations Director, Phil Yell, adds: “Sustainability is an ever-

one-stop shop concept that delivers products at the right place and time,

growing concern for businesses, so it’s essential that organisations such as

and in the precise volumes required. By providing mixed product deliveries

ours proactively drive forward greener practices. The bottom line is that

nationwide (removing the need to use separate suppliers), Arbor is using

we genuinely care, so this governs how we act and the way we help our

fewer vehicles on the roads, making fewer deliveries and reducing its

customers meet stringent environmental legislation. By increasing our

carbon footprint. In addition, transport planning is automated through

in-house transport capabilities, we now have visibility over a wide range of

routing and scheduling software, further maximising efficiencies and

KPIs helping us to reduce mileage and improve fleet utilisation, while always

vehicle fill rates. With fresh panel designs, Arbor’s new-look lorry fleet is

delivering on our service commitment to customers.”

also ready to take the Warehouse on Wheels concept to the next level and More at  www.arborforestproducts.co.uk

help the company’s customers enhance their own green credentials.

Accsys increases Accoya® wood capacity by a third Accsys, the manufacturer of highly sustainable Accoya wood, has successfully expanded production capacity at its facilities in Arnhem, the Netherlands. The first commercial batch of Accoya wood has been produced from its new, fourth acetylation chamber.

Accsys has invested over €30 million in expanding the Arnhem site, including improving the wood handling for the whole site. The new

they need. Our expansion at Arnhem is a significant step in the right

acetylation chamber, which weighs in at 65 tonnes and over 14 metres long,

direction of getting more Accoya out to the market. It’s part of our

increases the production capacity at Arnhem by a third, up from 60,000m3 to

ambitious growth plan to expand production and fulfil our purpose of

80,000m3 (25.4 to 34.0 million board feet) a year.

changing wood to change the world.”

In addition to the new acetylation chamber, Accsys has also invested

Alongside the expansion at its existing site in Arnhem, Accsys is developing

in developing the Arnhem plant’s facilities. The improvements include:

a facility in North America. In April this year Accsys began groundwork for a

new capabilities to support safe and rapid handling and logistics of the

new factory in Kingsport, USA, which is anticipated to begin producing in 2024.

increased volumes of wood; and a new quality monitoring and assurance

The project is a joint venture with Eastman Chemical Company and is due for

technology with cameras, infrared scattering and x-rays to examine every

completion and first production batch in Q1 2024.

board to ensure customer satisfaction with the products. A new 20,000m2

Accoya wood has been on the market since 2007 and is now sold by

(200,000sq. ft.) warehouse opened in October at Hoevers, which will provide

stocking distributors in more than 35 countries. The drive to net zero and rise

35,000m3 of raw material storage close to the Arnhem site.

in conscious construction have accelerated demand for timber construction

Rob Harris, CEO Accsys commented: “The world urgently needs

materials. Unlike other woods, Accoya is long lasting and is manufactured

solutions for sustainable construction. Durable, sustainable, and with

so as not to visibly swell, shrink or distort. It is a natural carbon sink and is

incredibly high performance, Accoya is in high demand – and we’re

certified at the C2C Gold level for its circular economy benefits.

working as hard as we can to produce much more of it. We have earned More at  www.accsysplc.com

a loyal customer base and our priority is to deliver more of what Timber Construction Magazine

Winter 2022

10

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 @Timber_Media

THE TIMBER SPECIES OF THE FUTURE.

PIVETEAUBOIS

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N E E D M O R E I N F O R M AT I O N ? C O N TA C T YO U R E X P E R T : Elisabeth PIVETEAU Timber Construction Magazine

|

+44 (0) 7821 807 788 Winter 2022 11

elisabeth.piveteau@piveteau.com | www.timbermedia.co.uk  @Timber_Media

Cinema «Les Fauvettes» - Architect : Françoise RAYNAUD

DOUGLAS FIR

FEATURE  TDUK

Timber’s Future Remains Bright The long-term future for timber construction remains bright despite turbulent times ahead. This was the conclusion of speakers at the recent TDUK Global Market Conference.

M

ore than 130 industry leaders came together in London

Economics Director at the Construction Products Association (CPA).

on 2 November to discuss the state of the timber sector

Noble began by acknowledging how difficult it currently is to forecast

at Timber Development’s UK’s (TDUK) Global Market

accurately for 2023 considering the recent political and financial chaos.

Conference. While numerous speakers warned of stormy

“No-one knows what’s definitely going to happen, and there’s real

weather ahead amidst gloomy economic projections for 2023, they also

uncertainty around the 2023/24 forecasts,” he said.

said that brighter days would follow, with the industry poised for major

He explained that UK GDP got back to pre-Covid levels at the start

growth considering timber’s status as a key low-carbon solution.

of 2022, but that economists were expecting it to fall during both Q3

Attendees were welcomed by TDUK chief executive David Hopkins,

and Q4 this year, putting the UK into recession. Noble believes there

who began proceedings by reiterating the recent merger between the

will be further contraction at the start of 2023, but that the recovery

Timber Trade Federation and TRADA to become Timber Development UK

will begin during the second half of next year, and that interest rates

(TDUK). He said: “TDUK has been formed to better reflect the reality of

will peak somewhere around 4% in 2023.

the market. Most of our members sell more than just one set of timber

While the UK entering recession with a forecast 1% fall of GDP next

products to their customers, so we want to bring everyone together and

year is not a positive step, Noble reassured the gathered delegates that

get a better sense of what is happening right across the timber market.

these falls are not as catastrophic as the economy saw during the crash

“TDUK will lead best practice with the industry’s most comprehensive

of 2008, when GDP fell by 5%. He also pointed out that construction

technical resource library. We’ll also give you the tool and guidance to

was at a very high level during 2020 and 2021 due to all the domestic

lead the timber sector towards a low-carbon future, which now has to be

RMI work carried out during Covid, and so the decline in construction

central to the way we all do business.”

is from these high points, and that he expects construction to begin its

This was followed by a presentation on the current state of the timber

recovery in 2024.

supply trade from TDUK head of technical and trade, Nick Boulton. Nick

Concluding the conference, David added: “The last couple of years

outlined the way volumes of timber imports into the UK have fluctuated

have thrown some considerable challenges at our industry, with the

over recent years, both during and immediately after the Covid pandemic.

pandemic, invasion of Ukraine and political instability placing the market

He said: “By the end of 2021, shortages of other materials encouraged

on a rollercoaster, where highs are to be matched by lows. This coming

people to delay work and so demand for timber fell, resulting in ports

winter looks no easier with energy security likely to be a key concern

being full of unneeded timber stock. That’s part of the reason why, in the

for businesses and households across Europe, as spiking interest rates,

first six months of 2022, volumes of imports decreased while the backlog

inflation, and labour availability create a challenging business environment.

at the ports cleared. But in recent months, loss of consumer confidence

“However, against this gloomy outlook, there is room for optimism

has become the main cause of reduced demand for timber, and other

on a policy level, with our speakers outlining the increasing recognition

building materials, in the domestic RMI market. We did see growth in the

of timber as a climate change solution for the built environment.

market during Q1 of 2022, which continued until June before starting to

Through TDUK we are creating an opportunity to significantly advance

fall in line with decreasing consumer confidence, exaggerating the usual

timber’s position in the market, as we build strong connections

summer slowdown in the softwood market.”

between suppliers and specifiers.”

The challenging task of predicting what lies ahead for timber More at  www.timberdevelopment.uk

and the wider construction industry fell to Professor Noble Francis, Timber Construction Magazine

Winter 2022

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FEATURE  TIMBER EXPO 2022

Record Returns at UKCW

The UK’s largest event for the built environment, UK Construction Week (UKCW) Birmingham, made a welcome return to the NEC in October, with visitor numbers up 19% from last year.

T

he show drew over 23,900 visitors from as far afield

Gary Scott, managing director at Hanson Plywood, commented:

as Turkey, Brazil, Australia and Canada, and included

“We were at the show because it’s the hub of the UK construction

a host of high-profile names including West Midlands

industry. We get a lot out of it; we don’t do many shows, but UKCW

Mayor Andy Street, Channel 4 presenter George Clarke,

Birmingham does work.”

and BBC journalist and presenter Simon Jack.

Exhibitors at Timber Expo include Rokamat, Engineered Timber

Co-located within UKCW Birmingham was Timber Expo, which

Solutions Ltd, Woodolex Ltd, the Ghana Forestry Commission and

attracted over 2,000 visitors (8% of the total attendees) across

Hanson Plywood Ltd who specialise in the import, storage and

the three days, including architects, local authorities, merchants,

distribution of wood-based panel products throughout the UK.

developers, housebuilders and contractors.

Timber Expo featured a programme of industry leaders, including

Designed for people who use, specify, design and build with

architects, developers, housebuilders and merchants to name a few. They

timber, and offering the opportunity to join hundreds of other brands

debated and discussed the sector tackling post pandemic supply issues,

showcasing their latest innovation, products and services, Timber Expo

post Brexit challenges, the impact of the Ukraine conflict on timber supply

was backed by and held in collaboration with Timber Development UK,

chain and the drive to net zero as we strive to meet COP26 targets.

BM TRADA, Timber Construction and Timber Trader UK.

The exhibitor profile includes structural timber frame, sawmills,

Nathan Garnett, UKCW event director, commented after the show:

merchants, glulam, SIPs, CLT, fixings and fastenings, timber cladding,

“It is crucial that timber, as a sustainable building material, is placed

doors and windows, mouldings, skirtings and flooring products.

front and centre of the UK’s largest construction event. There is so

Andy Howe, founder and managing director of CareersForce, was

much happening in the construction industry right now that has put

named UKCW Role Model 2022; CareersForce helps UK key workers

UK Construction Week into a unique position, whereby it can inform

such as those from the armed forces, police and NHS to forge a new

and educate the sector as it moves forward. There is a real sense of

career in a range of new sectors including construction. The winning

momentum now as we plan the next one, especially on meeting our

exhibitors of this year’s Stand Awards included: Rolec (best 50m+ space

next zero targets and creating long lasting culture change. A record

stand), Harwoods (best space under 50m), Restec (best shell scheme),

number of companies have signed up for 2023 so we look forward to

Tough CAD (best use of marketing), Zero Hub (most interactive) and

really growing the UKs largest trade show for construction.”

Celsa (for innovation).

Chloe Donovan, chief executive of Natural Building Systems, said: “We’ve had an amazing time - met everyone from potential suppliers,

UKCW London will take place from 2-4 May 2023 at ExCeL

industrial partners, contractors and investors; I can’t recommend it

UKCW Birmingham will run from 3-5 October 2023 at the NEC.

highly enough.”

More at  www.ukconstructionweek.com

Timber Construction Magazine

Winter 2022

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WE MAKE MORE THAN CABINETS

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www.OwenInternational.co.uk Timber Construction Magazine

Winter 2022

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FEATURE  TIMBER EXPO 2022

Tradition, Innovation & Years of Experience  Haacke Isolierklinker – a company with tradition and know-how with optimal detailed solutions and the color design of a facade that can give any house style and character.

Insulating clinker facade insulation

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When using insulating clinker bricks,

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building owners have an opportunity to solve

ago. It has been used in the construction of

two problems at once. This includes upgrading

many different buildings such as hospitals,

the home with an attractive appearance with a

schools, bridges, etc.

new clinker facade and at the same time getting Optimum heat protection

significantly improved thermal insulation. The insulating clinker is a type of thermal insulation

A modern, elegant facade with a

composite system (ETICS). This composite

sophisticated and visually appealing

system is then used to insulate building facades.

appearance: the clinker bricks are a great

This means that insulating clinker bricks are an

insulator and also very beautiful to look at.

alternative to conventional external insulation

Our insulated clinker bricks offer excellent

with a stone look. With the help of the use of

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product for effective, reliable, safe and sustainable thermal

TDUK Wins Sustainability Award  During Timber Expo, the Timber Development UK (TDUK) team were on hand to showcase the many benefits of timber in construction.

The TDUK stand stood at the centre

David said: “We were thrilled with the response

of the Timber Expo pavilion, where visitors

to Timber Expo. The panel discussions at

could ask questions and get advice on how to

the Sustainability Hub were incredibly well

incorporate more timber in their construction

attended and are a testament to the growing

projects. They were also able to access a wide

interest in timber as a low-carbon building

range of free information and materials,

material right across the supply chain.

including the first issue of TDUK’s Designing

“Attending Timber Expo and UK

Timber magazine for architects and specifiers, and a three-volume series of textbooks on the Design of Timber Structures created by

Construction Week gave us a fantastic TDUK chief executive David Hopkins (middle) and head of education and engagement Tabitha Binding receive the UKCW Sustainability Award.

Swedish Wood in partnership with TDUK.

opportunity to raise awareness of the new TDUK brand now that the Timber Trade Federation and TRADA have merged into one

As the main supporter of Timber Expo, TDUK also organised a series

organisation. The TDUK stand was incredibly busy throughout the whole

of presentations as part of the Sustainability Hub. TDUK chief executive

event, and we were very pleased by the positive response to our new

David Hopkins was on stage to chair discussions on a wide variety of

brand and our renewed commitment to support the timber industry as the

topics including the commercial reality of low-carbon construction, how

largest, most comprehensive supply chain body for timber in the UK. We

to achieve affordable zero-carbon newbuild homes and an introduction

were especially delighted to be chosen as winner of the UKCW Sustainability

to Timber TED: an exciting new model for upskilling professions in timber

Initiative Award in recognition of our efforts to promote timber across the

engineering, design and construction.

entire construction supply chain.”

In recognition of its focus on sustainability, TDUK was presented with More at  www.timberdevelopment.uk

the UKCW Sustainability Award at the end of the three-day exhibition.

Timber Construction Magazine

Winter 2022

16

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 @Timber_Media

Timber Construction Magazine

Winter 2022

17

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COVER STORY  ROTHOBLAAS

Sustainable building: why you should choose certified quality materials

The Rothoblaas range of tapes, sealants and membranes

Rothoblaas offers a range of innovative solutions to support the growth of the Passivhaus sector and provides quality products for the most ambitious of timber construction projects.

T

he comfort offered by timber construction depends on how

The certification of a product, especially when carried out on a

well it is sealed and waterproofed. Quality construction

voluntary basis, is a formal act through which a company states, with

limits heat loss from the interior during winter and prevents

reasonable reliability, that a product conforms to a declared standard

interstitial condensation and the choice of the right

and is therefore suitable to achieve excellent quality standards.

membranes and adhesive tapes for roofs is important to guarantee the

Passivhaus components certification is exactly this – a seal of quality

correct functionality of the building and favours the best thermo-regulation.

that helps designers in choosing the materials to use for their projects.

Anyone who has ever been part of a building project knows that Rothoblaas-certified products and their strengths

qualified products are fundamental to its success. The essence of construction is to last long and be efficient: no wonder that nowadays

SPEEDY BAND: The tape ensures excellent adhesion and resistance.

the quality of a building is measured by its durability and effectiveness,

Applicable both indoors and outdoors, it guarantees fast and safe sealing on

and this inevitably starts from the quality of the materials used.

the most common substrates. It is free of separating film, for extremely quick installation and real savings on costs for the disposal of construction site waste.

Passivhaus approach

It has excellent mechanical tensile strength thanks to the reinforcement mesh.

Passivhaus, as a scientific certification protocol for low-energy

FLEXI BAND: This polyacrylate tape ensures excellent adhesion

buildings, was founded at the end of the last century in Germany with

strength and resistance on all surfaces. The special adhesive compound

the aim of identifying a building model that could guarantee excellent

guarantees functionality even in non-optimal conditions, for example

energy performance and high comfort throughout its life.

on very porous, dusty, or humid surfaces. The wider versions are perfect for sealing chimneys, windows, membranes to plaster or concrete and

To build according to the passive building criteria does not necessarily mean building according to one certain certification protocol. The design

many other applications. FLEXI BAND is the perfect tape for anyone

phase plays a major role in the definition of a building, in fact, the most

looking for a universal product of extraordinary quality.

SEAL BAND: is the acrylic tape that adheres effectively to all types

important certifications concern design development processes and not later certifications. A designer who aims at achieving very high energy performance

of wood, for any sealing inside the building envelope. It is available in

standards must inevitably respect certain rules and criteria that have now

versions with liner divided into two or three parts, it simplifies the laying

become the milestones of every certification protocol and have been

on edges, corners and any other critical node, while the impregnated

developed over the years by theorists and researchers in the sector.

paper support guarantees great workability and quick installation. SEAL BAND is the tape that simplifies any complex sealing.

In recent years, the world of timber homes has seen numerous

CLIMA CONTROL 80: is a variable diffusion membrane. It has variable

innovations in the field of energy efficiency with passive construction now a

resistance to vapor diffusion, which results in maximum protection within

well-tested construction concept and can be applied by anyone, anywhere.

Timber Construction Magazine

Winter 2022

18

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 @Timber_Media

COVER STORY  ROTHOBLAAS

Why is an EPD useful?

the walls and excellent safety in insulation. It is ideal for increasing the energy performance of packages and solutions in the renovation of existing structures

Designers: who want to make a good design of the building also

and is easy to install thanks to its transparency. It regulates the passage of water

from the environmental point of view. Because only through an EPD it is

vapor according to climate and humidity.

possible to know the environmental profile of a product and make reliable

TRASPIR 110: is a highly breathable membrane. The three layers of the

comparisons between two products from the environmental point of view.

Customers: who want to know the impact of the product on

synthetic membrane can be applied directly on the outmost side of the walls, right after the heat insulation on the walls.

the environment or stimulate awareness of the choices made by the

The added value of Passivhaus-certified components, as in the case of a

manufacturer during its production.

Manufacturers: as they acquire an awareness of the production phases

membrane for a building’s airtightness, is hands down its total independence from climatic zones. The quality of a component suitable to the highest standard

that have the greatest impact on the environment of their products.

of passive buildings is guaranteed regardless of the place where the building we

The Market: because to build ‘green’ buildings we need data on

are planning will be built. Therefore, the standard is internationally recognised

which to make choices. Without the study of the lifecycle of the product

as a mark of quality. We are very proud to have obtained BBA certification for

and without an EPD these would not be available.

one of our breathable membranes, TRASPIR 95. We are working on getting

It’s important because only after an assessment based on reliable

this certification for more products. In the era of major climate change, design

and recognised tools such as EPD we can talk about the sustainability of

must also have a say in energy saving, comfort, and sustainability.

a product without risking unfounded statements. In fact, it is impossible to determine in advance if, from an environmental point of view, one

Rothoblaas and EPD: knowing our products’ environmental impact

product is better than another as every assumption is personal and can

Environmental sustainability is an increasingly central issue in the

lead to incorrect interpretations. Following the process that leads to the

construction sector, and it has been considered in our company for a long

EPD avoids all this, returning verified, exploitable, and comparable data

time. Although timber construction is in many respects more sustainable

to the client.

than other building systems, an assessment of the impacts linked to Where I can find them?

the entire life cycle of the products is still necessary in order to make an

Valid EPDs can be browsed in the archives of the various Program

objective comparison between different building systems. A suitable tool

Operators available on the market, among which there are often mutual

for this is the Environmental Product Declaration (EPD).

FLEXI BAND

SPEEDY BAND

SEAL BAND - timber frame private structure renovated © Letts Buildings Services

CLIMA CONTROL 80

recognitions that allow an EPD published in one country to acquire

An EPD contains transparent, comparable, and independently verified information about the life cycle environmental impact of the product to

visibility in another. It is understood that the EPD, being a document

which it relates. The EPD is the final document that shows the data of the

independently verified and drawn up according to an ISO standard, is

product’s lifecycle assessment (LCA) and allows the assessment of the

already valid and usable worldwide.

This is a voluntary initiative, not obligatory by law, which we have

environmental performance of the product by studying all the steps it goes

decided to implement to know the environmental impact of our products

through during its life cycle from an environmental point of view.

and to allow the designer to have an accurate idea of the ecological What does having an EPD mean?

footprint of the building he is designing.

For the product, it means having studied its production process from an environmental perspective having analysed every aspect of it, from the raw

You can find our EPDs on our website in the Technical Insights

material input to its disposal. For a manufacturer, it means being aware of

section. Interested in gaining proficiency with airtightness?

the type of information needed to make a lifecycle analysis, how to find the

Practical training can be arranged with your local representative.

information, and how each production and management aspect of the product

Get in touch at  UnitedKingdom@rothoblaas.com

influences its environmental impact. Following this, improvement actions can be More at  www.rothoblaas.com

identified to make production and product management even more efficient.

Timber Construction Magazine

Winter 2022

19

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FEATURE  THE BIG INTERVIEW

Optimum Timber Performance

Sticx deal in a wide range of timber systems and since 2011 have grown to become a specialist provider of sustainable design and build options. We spoke to co-founder and director John Maddock.

S

ticx was founded by two

despite the recent challenges of Covid and timber

it reflects a reduction in demand, which is a result

directors that were very

price instability. We took the decision a few years

of a cooling market. The good thing as far as

experienced in construction,

ago that the advantages of metal-web joists were

we’re concerned is that cementitious products

rather than manufacturing. Chris

so significant that they would be our standard

and masonry all require high energy expenditure

Dermody had 20 years of experience running

offering, so we set up Joistz Ltd to fabricate them

in production and this is now giving us an

a company erecting timber frames for other

for all our projects and to create a second line of

advantage that it’s difficult to see us losing.”

manufacturers and John Maddock had 20

sales to builders and other framers.”

Not all about housing

years of main contracting experience. This has served them well over the last 11 years.

“A framer’s performance at site level may

Supply chain pressures

With continual discussion over the quality

The timber material supply chain has been

and quantity of housing required across the

only account for 20% of what they do, but it

under real pressure for some time and the

UK, timber frame is in a perfect position to

is almost entirely what they are judged on by

Ukrainian conflict has added to this – and does

capitalise on the requirement for quicker and

clients,” says John. “Sticx has grown organically

seem to be stabilising – but still has created a

more sustainable homes. But is housing still the

with a long list of repeat clients who know

number of business pressure points. “Timber

main sector driving timber frame specification

that we understand that the proven benefits

pricing went through a crazy period as Covid

– or have others started to catch up such as

of timber frame construction. Our ability to

finished,” says John. “We buy directly from the

education and retail?

prefabricate open or closed panels is matched

importers and prices, that had been relatively

by our considered approach to delivery. We can

stable for many years, suddenly went up around

says John. “Most of our work was in education

erect prefabricated panels, stick build frames

250%. Given that the construction industry over

and student accommodation, until we made

where access is limited, fabricate floor cassettes

the last 30 years has all but forgotten about

the decision to take our experience to clients

on or offsite and other options that are selected

inflation and clients expect extended fixed price

who were interested in saving money through

to suit site requirements.

periods, it has been a challenge.

design improvement. We have clients now

“We moved from Bootle to larger premises on the Wirral in 2016 and have continued to grow, Timber Construction Magazine

“Fortunately, prices have dropped back down but the concern we have about this is that Winter 2022

20

“Unusually, we have come the other way,”

who are more willing to invest in design, to standardise details and to save money through

www.timbermedia.co.uk

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FEATURE  THE BIG INTERVIEW

the elimination of waste. Whilst everyone is concerned about material price hikes, the real issue that is coming down the road is the skill shortages in traditional trades. Partnering with

“I don’t see how you can in one breath claim a climate emergency and then continue specifying concrete and steel. Timber has to be the way forward.”

a specialist framing contractor, secures clients ability to deliver projects that they may struggle to deliver otherwise. Long-term relationships

since the wholesale introduction of design and

de-risk so much of the work, clients are really

build contracting and invest in project designers.

“The main obstacle to the adoption of

cottoning on to this.”

“We have partnered with the Sovini Group on Merseyside, who have a pipeline of 1000 new units to build. We are helping them to standardise

BIM and better use of the technology is the

their designs, to make the small adjustments that

engineered timber – CLT and glulam – in recent

commercial approach of risk aversion. Clients

reduce wasted effort from following trades, to

years above the classic timber frame/panel

not wanting to procure traditionally because

take the lessons learnt from site and feed them

systems? But questions surround whether CLT/

they think they’d rather divest themselves of the

back into the designs for the next project. The

glulam is suitable for smaller development – is

design and measurement risk. It has lead us down

partnership allows us to work as a team with our

it cost-effective? “To find the optimum solution

a path where the people best placed to design

partners and the success of the relationship is a

for a project, it’s important to have all the tricks

out waste don’t believe it’s in their interest to

continuously improving outcomes for all of our

at your disposal. Early involvement of a timber

do so because they aren’t paid a sufficient fee.

partners. The entirety of this arrangement is the

frame specialist allows architects and engineers

Waste in the industry is hidden but there is so

definition of sustainable building.”

access to the best solution for any particular

much abortive work and wasted, repeated effort.

How do you see the timber sector developing

project. It’s unlikely that CLT will be the best

We can do so much more with the technology we

over the next 18 months and what plans has Sticx

value solution for social housing any time soon,

have, but the procurement method must align

for 2023? “The rise of timber frame is inexorable.

but it will start to sneak into projects where

itself with a progressive approach.”

The climate emergency demands the use of

There has been a big uptake and interest in

there are architectural imperatives, and as this happens it will be selected more by architects and engineers who know where to go to get the

sustainable materials – the skills shortage in Green and lean

traditional trades drives the need for more offsite

The construction industry is under huge

fabrication and generally we think we’re riding

pressure to provide zero carbon design and adopt

that trend. We’re obviously mindful of the macro

a more circular approach – how is Sticx ensuring

economic climate going into 2023: rising costs,

in the uptake of digital technology – is that true

high levels of sustainability, certification and

lack of available money and a general slowdown

and how are you using the latest architectural

streamlined offsite production processes? “We’re

in activity. We believe that timber frame will

and building design software?

firm believers that panelised systems are the way

continue to grow its market share. The price of

forward. We think that there is a huge amount

timber has dropped back to normal levels whilst

sector has not been slow with digital technology,”

of wasted effort going into volumetric solutions

cementitious products and steel, with the cost

adds John “Design is a large part of what we

where the concept is basically flawed. Timber

of energy in their production, will still be inflated

do. Practical and accurate design leads to waste

is the only sustainable construction material.

over the next year. We see more clients adopting

reduction and successful projects and I would

All of our material is PEFC-certified. Timber

timber frame because of this and we expect to

say somewhere around a third of our overhead

frame promotes better insulation detailing and

continue to grow.”

covers our design costs. I think generally the

the extra attention to design reduces wasted

industry needs to reverse the trend we’ve seen

material and just as importantly wasted effort.

design support they need.”

The timber sector has been historically slow

“I think we’d argue that the timber frame

Timber Construction Magazine

Winter 2022

21

More at  www.sticx.co.uk

www.timbermedia.co.uk

 @Timber_Media

FEATURE  WISDOME STOCKHOLM

Free Form Flowing Timber

A superb Free Form roof that could redefine the future of timber construction has been proposed for Sweden’s National Museum of Science and Technology.

W

ith its wave-like roof made of spruce laminated veneer lumber, it pushes the boundaries of what was previously considered possible. The Free Form roof was designed by the Swedish architecture firm Elding Oscarson in

collaboration with the Norwegian construction engineer Florian Kosche. Based on their designs, the timber construction specialists at Blumer Lehmann created the detail plans for the unique free form building together with their planning partners.

The pioneering Wisdome Stockholm is already being characterised as one of Sweden’s most important building projects. It features a spectacular timber construction with a surface area of 1,325sq m and a unique vaulted

geometries, the Swiss timber construction company Blumer Lehmann

main roof. Inside this experience arena is a hemispherical dome theatre

was the perfect partner to execute this ambitious project.

with a diameter of almost 22m and a height of around 12m. The theatre

For the main roof, the timber construction engineers at SJB Kempter

includes a 3D cinema with 100 seats. With 360-degree 3D projections and

Fitze opted for a lattice-shell structure with criss-crossing LVL beams. With

cutting-edge visualisation technology, it allows visitors to experience the

interlocking dowel joints and the help of cutting-edge planning tools, these

world of science and engineering in a new and fully immersive way.

were connected to form a double-curved grid. The differently vaulted roof construction is supported around the edge by 24 solid columns that are made

Pioneering timber design

from block-laminated LVL with dimensions of 60 x 80 and 60 x 60cm. The

The heavily curved Free Form timber roof connects the inside and

columns are connected rigidly to the approximately 1.20m-high concrete base.

outside areas of the National Museum of Science and Technology and

To limit the horizontal deformation of the roof support structure, tensioning

creates a spectacular interior for the dome structure of Wisdome Stockholm.

rods are integrated into the wooden columns, to which a considerable pre-

The roof geometry spans a footprint of 25m x 48m, without columns. On

tensioning force is applied after assembly. A solid edge beam is arranged on

three sides of the building, a projecting roof supplements the roof support

the column heads to enclose the Free Form construction all the way round.

structure and brings the curvature of the roof surface level with the eaves 1:1 model for the roof construction

line. The Free Form structure is based on a grid system of LVL beams.

The dome below the vaulted roof is made from cross laminated timber

Two mock-ups provided the information needed for the construction

(CLT). A requirement of the architecture competition was that timber be

design. The lattice-shell roof support structure consists of three transverse layers

used in the construction, in particular CLT and laminated veneer lumber

of LVL beams and two longitudinal layers of beams. Unlike constructions made

(LVL). One of the main partners of the Wisdome Stockholm project is

of laminated timber, which are bent and milled in the factory beforehand and

Stora Enso – the Finnish-Swedish company also supplied all the timber

delivered to the construction site as complete components, for construction

construction material for the project. The flagship building marks a

of the main roof only the lowest panel strip layer was laminated in the required

milestone in sustainable, climate-friendly construction. It pushes existing

curvature and delivered as a finished component. This layer served as a scaffold

technical boundaries and is intended to showcase what is possible with

and structural aid for the complex assembly process. The remaining four beam

wood as a climate-friendly construction material.

layers were only bent and dowelled during assembly on site. All the connections are designed with dowels and peg connections, which are milled from the same

Roof support structure with 20 km of LVL panel strips

LVL material. Wisdome Stockholm is scheduled to open in 2023.

With its experience in timber construction and its technical expertise More at  www.blumer-lehmann.ch

in project planning and the implementation of sophisticated Free Form Timber Construction Magazine

Winter 2022

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 @Timber_Media

Timber Construction Magazine

Winter 2022

23

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 @Timber_Media

FEATURE  FIRE DOOR SAFETY

Be Aware: Close the Door A third (32%) of the British public would not report a problem with a fire door, with a perceived lack of personal repercussions being one of the main reasons for not reporting, new research to mark Fire Door Safety Week found.

O

rganisers of Fire Door Safety

action over a propped open fire door as

in preventing tragedies. Fire doors propped

Week say the findings show

they wouldn’t know who to report it to, and

open put lives at risk in the unfortunate event

that there is a “clear lack of

almost half (49%) do not feel it’s their place

of a fire. Without being properly closed, a fire

accountability” over reporting

or role to report it.

door cannot hold back the spread of fire and

fire door issues, and that lives are being put

Helen Hewitt, CEO of the British

smoke to fulfil its life-saving role.”

at risk as a result. Despite three quarters

Woodworking Federation which founded

(75%) correctly believing that propping a

Fire Door Safety Week, said: “There were 243

doors are a common occurrence, with 10% of

fire door open stops it performing its role

fire-related fatalities in England in the past 12

respondents having seen a propped open fire door

in the event of a fire, 44% wouldn’t take

months, so individual action really is crucial

in their place of residence on some occasions and

The research showed that propped open fire

 Fire Door Manufacturer Adds Second Factory A specialist manufacturer of fire rated, acoustic and PAS 24 security doors and doorsets, is adding a second factory to boost its manufacturing capacity, ahead of its 100th anniversary next year.

Birmingham-based E&SW Knowles employs 114 people and is expanding its manufacturing operation into a second building, adding 13,750sq ft to its existing 44,500sq ft capability. It is designed to support strategic growth and will further improve manufacturing efficiencies and customers’ experience.

The investment has been announced following the company’s recent acquisition by Sentry Doors Limited. The two companies’ product ranges are complementary and have minimal overlap in

industry experience but are also looking ahead to ensure we remain

the industry sectors they serve. The partnership will provide both

competitive, customer-focused, and innovative.”

businesses with opportunities for further innovation and growth.

Born from a family-owned business, E&SW Knowles’ products are

Managing director Steve Horner said: “This strategic acquisition

widely specified in the education, healthcare, leisure, commercial and

along with our 100th anniversary will mean that 2023 will be a very big

social housing sectors, complying with the latest standards, building

year for us. We wanted to do something that marked this achievement

regulations and sustainability demands. Sentry Doors is a specialist

but also put a marker in the sand about where we are going and

manufacturer of bespoke, fully certified timber fire and security

our intention to become the UK’s leader in timber fire safety and

entrance doors for the social housing, public sector residential markets

security doorsets. We are committed to the West Midlands area, and

and the supplier of choice for local authority, housing associations and

will create 10 more jobs next year alone. The new facility will mean

their contractors.

more new machinery, processes, and infrastructure to support our More at  www.knowlesdoors.co.uk

growth ambitions. We are very proud of our 100-year heritage and

Timber Construction Magazine

Winter 2022

24

www.timbermedia.co.uk

 @Timber_Media

FEATURE  FIRE DOOR SAFETY

Build better to improve living

comfort

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LCA

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20% in the workplace. It also identified that the

people see a fire door propped open, they close

for education on the role of fire doors. The

two most common objects used to prop open a

it. It’s a simple ask that could save a life.

encouraging news is that when people are

fire door are a wedge and a fire extinguisher.

“Everyone has a role in ensuring their

better informed about fire doors, they’re more

buildings remain safe from fire, and if you

likely to report issues. Half (49%) of respondents

a fire door that was propped open with a wedge

have any concerns, then please ensure these

said having a better understanding over

or a fire extinguisher was safe and 18% didn’t

are reported to the building owner or person

what fire doors do and how they work would

believe a propped open fire door poses a risk to

responsible for the fire safety of that building.

encourage them to take action.”

those in the building so wouldn’t take action. Not

If it continues to be a problem or you are

only was a propped open fire door incorrectly

concerned about fire doors in a building, you can

deemed as safe, but 15% believed that keeping a

contact your fire service for advice and support.”

Concerningly, 31% incorrectly believed that

fire door closed stops it performing, highlighting

The research also found a lack of

a lack of understanding around the role fire doors

understanding over what constitutes a safe

play in the event of a fire.

fire door. Alarmingly, 44% believed that either:

Gavin Tomlinson, National Fire Chiefs

a fire door is a normal door covered in fire-

Council (NFCC) Chair for Protection and Business

resistant paint (13%), a fire door is a normal

Safety said: “We urge everyone to help keep

door but with ‘fire door’ signage (13%), or that

buildings and their occupants safe and Close

any timber door was a fire door (7%).

the Door on Fire. A fire door can only protect from fire and smoke if it is closed. We ask that if Timber Construction Magazine

More at  www.firedoorsafetyweek.co.uk

Fire door keep shut

Helen Hewitt added: “There is clearly still a dangerous lack of understanding and need Winter 2022

25

www.timbermedia.co.uk

 @Timber_Media

FEATURE  CLT AND DURABILITY

Weathering the Storm: Moisture Effects on CLT

Phil O’Leary, technical manager at BM TRADA, explores how moisture dynamics can affect the durability of cross laminated timber, covering the latest research from BM TRADA and Stora Enso.

C

ross laminated timber (CLT) has become a popular

indefinite if they remain dry. That said, timber is at risk of fungal decay

choice for designers over the last 15 years. Spanning

if its moisture content exceeds 20% for an extended period of time. In

residential buildings to educational and commercial

a well-designed and constructed timber frame building or pitched roof,

spaces, the market growth of CLT can be attributed

moisture content in service will be between 10% and 14% – well below

to its usability in complex timber structures. Modern lightweight

the fungal decay threshold.

timber frame buildings have been used for nearly 100 years. Plus, a

While CLT follows the same durability principles as lightweight

large proportion of the UK housing stock has timber pitched roofs,

timber structures, its thickness and the mass of timber used present

many of which are centuries old.

additional considerations when exposed to moisture. Timber studs, joists and rafters have a relatively large surface-area-to-volume ratio

CLT has also created exciting opportunities for low/negative carbon and sustainable buildings. However, as with all construction products,

and so typically dry rapidly when conditions allow. On the other hand,

there has been a learning curve as the industry’s understanding of

CLT has a much smaller surface-area-to-volume ratio and so drying rates

CLT’s strengths and weaknesses has grown. One such area where new

can be substantially slower, which can affect durability greatly.

knowledge has been uncovered is in how moisture can compromise the material’s durability.

Insulation considerations

CLT durability

construction. This means all thermal insulation is placed on the outside

CLT external walls and roofs should always be designed as ‘warm’ face of the wall or roof panel. By placing the CLT panels within the thermal

Durability of construction materials and components is particularly important as more people talk about sustainability. The benefit of

envelope of the building, panels are in what should normally be a warm and

timber and wood-based products is that the lifespan can be almost

dry environment – creating the ideal environment for timber to endure.

Timber Construction Magazine

Winter 2022

26

www.timbermedia.co.uk

 @Timber_Media



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Construction Magazine Winter 2022 by Arbor www.timbermedia.co.uk  @Timber_Media 27Forest Products,

FEATURE  CLT AND DURABILITY

CLT will no doubt play a key part in creating greener, low carbon buildings. To do so, an understanding of how to effectively protect CLT from moisture during construction is vital.

Image © Piveteaubois

Creating room to breathe

The most common insulation material placed on the outside of CLT in the UK is rigid foil-faced insulation boards (e.g. PIR/PUR/phenolic). It

To achieve long-term durability of timber structures, a primary

is installed to walls, flat roofs and pitched roofs. While these insulation

consideration is to provide a combination of drainage, ventilation and

materials have excellent thermal resistance and provide the required

breathability. It is not normally an issue if timber gets wet, providing

U-values, the foil facings limit drying of the CLT panels behind.

water can drain away quickly and the timber is subsequently allowed to dry. Slowing down or restricting drying though the use of high

Developing understanding

resistance insulation products and/or vapour control layers on the

Moving forward requires learning from previous experience, of

inner or outer faces of the panels can slow drying to an extent that the

which data forms a large part. For this reason, BM TRADA and Stora

development of fungal decay may become a risk if panels are subjected

Enso have conducted research to better understand the moisture

to adverse conditions during construction or in service.

On the continent, CLT building systems are often paired with mineral

dynamics in CLT. The two-part project looked at both wetting risk during construction and drying rates, information which can be used to

wool or wood-fibre insulation products – these breathable insulation

determine moisture distribution behaviour.

materials are typically beneficial to timber building systems as they allow

The drying rates of five-layer, 100mm-thick CLT panels were

more rapid drying of the CLT panels if they are exposed to wetting during

investigated – various configurations were tested, including covering

construction or in service. The use of breathable insulation products and

the wet outer face of panels with foil to replicate panels covered with

systems, in conjunction with good overall design detailing and a moisture

rigid foil-faced insulation boards and/or vapour control layers. This test

management plan for the construction phase, will have a significant positive

set-up was intended to replicate typical UK construction build-ups for

impact on the long-term durability and robustness of CLT structures.

warm walls as well as flat and pitched roofs.

Planning ahead

During testing of the covered panels, water in the wet outside face lamination was observed slowly passing through the thickness of

CLT will no doubt play a key part in creating greener, low carbon

the panels to the dry uncovered side, confirming the previously held

buildings. To do so, an understanding of how to effectively protect CLT

assertion that panels could dry to the inside. However, with a starting

from moisture during construction is vital. Where moisture does pose

moisture content of 35% in the wet outer lamination, it took almost

issues, appropriate remedial action must be prioritised. This should also

16 months for the moisture content to fall to 20%. This means drying

be taken into consideration at the onset of any timber construction

could take years for higher moisture contents and/or thicker panels. On

project, particularly when allowing sufficient drying time to prevent

the flip side, uncovered panels that were able to dry directly from the

fungal and structural decay.

wet face took approximately six weeks for a similar moisture content More at  www.bmtrada.com/timber-services

reduction.

Timber Construction Magazine

Winter 2022

28

www.timbermedia.co.uk

 @Timber_Media

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Timber Construction Magazine Winter 2022 Tanalith® @Timber_Media 29the type ofwww.timbermedia.co.uk The Pine cladding images shown above illlustrate colours that can be achieved when using Lifestyle colours with Tanalith® E.

FEATURE  THERMAL EFFICIENCY

Cambridge Plans for Passivhaus Cambridge City Council has turned to Passivhaus principles to deliver its next tranche of affordable and sustainable living.

T

he need for energy efficient homes has never been greater with the cost-of-living crisis and events in Ukraine continuing to push fuel bills to all-time highs.

To counter this, the adoption of a Passivhaus approach

using timber frame is beginning to appeal to many local authorities and housing associations to protect tenant’s surroundings and deliver low carbon homes.

With the impact of continued rising energy costs and a drive towards meeting Cambridge City Council’s objectives to be net zero carbon by 2030, Cambridge Investment Partnership (CIP) has started work to deliver

Tom Hill, regional director for Hill comments: “As a partnership we are

its first pilot Passivhaus council homes for local residents.

committed to creating sustainable homes with all our new developments

The 12 new low carbon council homes at Fen Road, East Chesterton

gas free. These new Passivhaus council homes go one step further to

are the first of three sites that have been chosen by CIP for Passivhaus

enable us to learn and continue to enhance our approach to sustainability

pilot council homes.

which can be implemented further across all future developments. The

The development at 71-73 Fen Road sees the replacement of two

pilot will allow us to explore the delivery of cost-efficient low carbon

existing single storey buildings, which are no longer in use and in a poor

housing for the future in terms of up-front building costs, ongoing

state of repair with 12 low carbon homes comprising eight two-bedroom

maintenance costs for the Council and low bills for residents.”

homes, two three-bedroom homes, one three-bedroom wheelchair

As part of the development, CIP will create a new, safe and green

adapted house, and one four-bedroom wheelchair adapted home.

access for walking and cycling to the Five Trees open space, which

Cllr Gerri Bird, executive councillor for Housing at Cambridge City

will be preserved in its entirety, helping the local community to enjoy

Council and CIP board member said: “We are now in an era of increasing

this space. There will also be parking spaces with electric vehicle

living costs, which are impacting everyone, so I’m delighted that we are

charging points and generous provision for new cycle parking. This well

able to bring forward this Passivhaus pilot scheme to not only deliver

positioned site will provide easy access to the city centre and other

the much-needed council housing in the city, but to provide homes that

amenities for local residents.

cut energy bills, tackle fuel poverty and are great places to live. I am

Cambridge Investment Partnership will also be delivering

especially pleased that two of these houses are wheelchair adapted for

Passivhaus council homes at Borrowdale and Ditton Fields. Passivhaus

families, which is important as we look to tackle inequality and provide

buildings achieve a 75% reduction in space heating requirements

more fully adapted homes for disabled people.”

compared to the standard practice for UK newbuild homes. The

CIP has worked with experienced architect Pollard Thomas

Passivhaus standard therefore gives a robust method to help the

Edwards, The Environment Partnership and Carter Jonas to bring

industry achieve the 80% carbon reductions that are set as a legislative

forward this scheme. The pilot ‘Passivhaus’ council homes will have very

target by the UK Government.

low energy use and heating costs and will be built using offsite timber More at  www.ip-cambridge.co.uk

frame systems, with thick highly insulated walls and gas free heating.

Timber Construction Magazine

Winter 2022

30

www.timbermedia.co.uk

 @Timber_Media

New Self-build farmhouse warms to external Wraptite® airtight solution A new self-build farmhouse in the beautiful Scottish countryside has been fitted with the high-performing Wraptite air-barrier. The project is designed to Passivhaus standards

by Architect Frances Strachan-Friar.

Talla Fiodha (‘timber or wooden hall’ in Gaelic), Charleston Farm, near Errol, Perthshire, will be the new home for Frances and her husband.

South London loft conversion specialist finds multiple uses for West Fraser’s SterlingOSB Zero A family-run firm from Surrey, which specialises in loft conversions and the creation of bespoke garden rooms, is making extensive use of SterlingOSB Zero from panel product manufacturer, West Fraser, based on the board’s value, performance and ease of installation. MB Loft Conversions, based in Caterham, was established eight years ago

by Mark Bell and undertakes contracts right across South London, Surrey, Sussex and Kent. Typically, the company completes up to a dozen loft conversions and other projects each year. Mark purchases his SterlingOSB Zero from Selhurst Timber and other builders merchants’ local to clients’ properties. While he mainly prefers to use 18mm tongue and groove boards for their strength and excellent alignment when laid, some of MB Loft Conversions’ builds also use quantities of 11mm (square edge) SterlingOSB Zero.

From the outset, the aim was to achieve a more sustainable design and follow a different approach from the traditional timber kit. After undertaking significant research into different types of construction, the architect selected Xilonor CLT cross-laminated timber installed by Glulam Solutions Ltd., Inverurie.

Frances Strachan-Friar commented on how the selection of Wraptite has benefitted the development. “The specification of the correct type of airtightness barrier was critical in achieving thermal efficiency. Wraptite was chosen because it allows the airtightness layer to be fitted to the outside of the construction. In doing so, the external application of Wraptite provides essential protection in the form of waterproofing and weatherproofing for the CLT during the build.

Mark Bell commented: “There is a number of reasons why we prefer to use both West Fraser’s 8x4 and 8x2 T&G Sterling OSB Zero, apart from it being a product I’m very familiar with. We know we can rely on the quality, while the 18 mm T&G boards are like gold when it comes to doing flat roofs and make a really good deck. We also use them for the cheeks of the dormer windows, while we switch to the 11mm for internal walls. There are also many applications for SterlingOSB Zero when it comes to our garden rooms.”

View more Case Studies on our website... www.proctorgroup.com contact@proctorgroup.com +44 (0) 1250 872261

To find out more about West Fraser’s products for housebuilders, call 01786 812 921 or get in touch with Dan Clarke – email Daniel.Clarke@westfraser.com or download product brochures from the housebuilder page of the West Fraser website uk.westfraser.com/housebuilders

TECHNOLOGY YOU CAN RELY ON, FROM A BRAND YOU CAN TRUST

Biotecture Living hoardings transform Stonecutter Court site

Partel’s high performance ECHOFOIL EXO allows timber frame Buildings to breathe

Biotecture has designed and installed a green hoarding for repeat client Mace on the construction hoarding of the new Stonecutter Court development in London. Stonecutter Court, close to Fleet Street and Farringdon, is being re-developed into a flexible, user experience-driven office building. The new development, designed by Architect, TP Bennett, has strong sustainability credentials and is targeting a BREEAM Excellent rating and WELL Gold standard upon completion. International construction and consultancy company, Mace, was appointed to develop the project. As sustainability is one of the biggest drivers of the new development, greening the construction hoarding was important for both the end client and the contractor. Mace had already used the Biotecture PlantBox living hoarding at nearby Farringdon Road and so understood the benefits it can bring to a construction project. As well as showcasing the client and contractor’s green credentials, the living hoarding will improve the appearance of the construction, and help improve air quality thanks to the removal of dust, dangerous particulates and harmful pollutants from the air by the plants. This creates a healthier environment for those working on site as well as those living and working in the surrounding area.

PlantBox living hoardings offer a far more sustainable choice than signage, artificial plastic greenery, or photographic panels of foliage, whilst avoiding issues with graffiti.

With energy prices increasing and a focus on improving the fabric of buildings through increasing legislation, the need to create energy-efficient building envelopes has never been so important. To help achieve this, Partel has developed ECHOFOIL EXO, a highperformance breather membrane designed specifically for timber frame construction.

Developed by Partel, one of the market leaders in the manufacture of specialist breather membranes, ECHOFOIL EXO is a low emissivity reflective membrane designed for use in timber frame panel construction. Offering a wealth of benefits, the breather membrane improves thermal comfort and enhances airtightness in a wide range of buildings.

This reflective foil membrane has one of the lowest emissivity values in the market of just ≤ 0.04 and a cavity R-Value of 0.78 m2K/W. This means it is the ideal solution to help architects and housebuilders achieve a desired low U-value. It is also highly breathable with an Sd value of 0.08m. As part of its on-going commitment to the responsible performance of buildings and sustainable production processes, Partel has published Environmental Product Declarations for five of its innovative low-carbon building envelope solutions. ECHOFOIL EXO is one of Partel’s EPD certified breather membranes.

Biotecture is the UK’s leading living wall and living hoarding company, and this year is celebrating its 15th anniversary.

To find out more about Living Hoardings, call us on +44 (0)1243 572118, email us at enquiries@biotecture.uk.com or visit our website: www.biotecture.uk.com/bioextra/living-hoardings

Timber Construction Magazine

Winter 2022

ECHOFOIL EXO is currently available in the UK, Ireland, and mainland Europe.

For more information visit www.partel.co.uk or contact the Partel team on 02037 401918 to discuss requirements for your next project.

31

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Choose life, Choose wood

Discover our world of timber Timber Construction Magazine

Winter 2022

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