About us

KLH UK is a market leader and pioneer for Cross-Laminated Timber design and construction. A wholly owned subsidiary of the KLH Massivholz which has manufactured and distributed CLT worldwide for over 20 years.

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2nd KLH
CLT FACTORY

Two decades after pioneering the world's first cross-laminated timber facility in Katsch in 1999, KLH celebrated another milestone with the inauguration of its second production site in Bad St. Leonhard, Carinthia, Austria. Boasting an impressive annual output capacity of approximately 125,000 m3 of KLH® - CLT, this expansion represents a significant leap forward in KLH's commitment to innovation and sustainability in timber construction.

The incorporation of state-of-the-art production technology not only solidifies KLH's competitive edge but also elevates the overall efficiency of CLT manufacturing. Moreover, this expansion has catalysed a positive effect in the local economy, creating over 100 employment opportunities in the economically challenged Wolfsberg region. Through strategic investments and a steadfast commitment to sustainability, KLH continues to shape the landscape of modern timber construction.

References

Projects from different
categories and countries

Refurbishment & Extensions

KIGA St. Martin

Modern two-storey kindergarten in timber construction

Single Family Houses

Canopy House

A home that integrates seamlessly into nature.

Educational Buildings

NCKU Art Garden

NCKU Art Garden – a meeting place for academic, artistic and social areas

Public Buildings

Kleiner Heidesee

Tiny houses with a private swimming lake

Public Buildings

Car Center

Forward-looking concept for commercial real estate in the automotive sector

Modular construction

Flexible living units

Modular solutions offer flexibility

Office Buildings

Fifty West

Pioneering architecture in Central Florida

Single Family Houses

House with forest views

New construction of an old farmhouse

Educational Buildings

Glenn Doman School

The symbiosis of sustainable architecture and progressive pedagogy

Hotels

Hótel Jökulsárlón

A hotel near the majestic Vatnajökull glacier

KLH designer –
Without
registration,
anytime,
anywhere

KLH DESIGNER

ARCHITECTURAL | STRUCTURAL | ECO

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Product Advantages

Where the effectiveness of wood meets modern technologies – building with KLH® has many advantages.

FREEDOM IN ARCHITECTURE AND SPACE CONCEPT

SIMPLE PLANNING OF INDIVIDUAL BUILDINGS

ENVIRONMENTALLY SUSTAINABLE BUILDING MATERIALS

HEALTHY, COMFORTABLE INDOOR CLIMATE

CLIMATE-FRIENDLY AND CO2 NEUTRAL

ELEMENTS CONTROLLABLE IN TERMS OF BUILDING PHYSICS

CE-CERTIFIED AND TESTED FOR ENVIRONMENTAL IMPACTS

SHORT CONSTRUCTION PERIOD AND DRY CONSTRUCTION METHOD

HIGH DIMENSIONAL ACCURACY DUE TO CNC-CONTROLLED CUTTING

LASTING VALUE AND ENERGY-EFFICIENT

HIGHLY STABLE COMPONENTS FOR WALLS, FLOORS AND ROOFS

COMBINABLE WITH ALL MATERIALS

EPD
in acc. with
ISO 14025
& EN 15804

Environmental
Product Declaration

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Events & Exhibitions

BAU

13.01 bis 17.01.2025

World’s leading trade fair for architecture, materials, systems
Trade Fair Center Munich
Hall B5 | Booth 129

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4DESIGN DAYS

23.01 bis 24.01.2025

Architecture | Design | Interior design
International Conference Centre Katowice (MCK)
Poland

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14. Forum International Bois Construction (FBC)

26.02 bis 28.02.2025

Int. Timber Construction Forum (FBC)
Paris Grand Palais
France

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International Mass Timber Conference

25.03 bis 27.03.2025

The largest gathering of mass timber experts in the world | Booth 714
Oregon Convention Center | USA

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HOUTBOUW

13.05 bis 15.05.2025

Trade fair for innovative solutions in wood and hybrid construction
Brabanthallen, Hall 1 | Booth D090
Den Bosch, Netherlands

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CONSTRUMAT

20.05 bis 22.05.2025

International Building Exhibition
Fira Barcelona – Gran Via Venue
Hall 2 | Booth E29
Barcelona, Spain

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WCTE

22.06 bis 26.06.2025

World Conference on Timber Engineering
Brisbane Convention & Exhibition Centre | Australia

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18. Europäischer Kongress (EBH)

08.10 bis 09.10.2025

18th European Conference
Urban Timber Construction
Kongresszentrum Gürzenich
Cologne, Germany

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BYGG REIS DEG

15.10 bis 18.10.2025

Scandinavian Building Exhibition
Norges Varemesse
Lillestrøm
Norway

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Building Green

29.10 bis 30.10.2025

Focus on sustainability within architecture and building
Lokomotivværkstedet | Booth 86
Copenhagen, Denmark

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29th International Timber Construction Forum

03.12 bis 05.12.2025

From practice – for practice
Congress Innsbruck
Austria

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News & Events

News

Green Energy

KLH is committed to sustainability: New photovoltaic system with 4,200 PV modules provides environmentally friendly electricity for KLH® production.

Publikationen

Timber Arch Vol. 04

On our journey through the world of timber architecture, we now find ourselves at the opening line of the fourth edition of Timber Arch. As in…

News

Fire protection test

KLH® – CLT has successfully passed the tests for the Australian and New Zealand markets in order to fulfil the fire protection requirements there.

News

Component catalogue

KLH Massivholz GmbH presents its latest innovation: the extended component catalogue, which is now available online. The revision of the catalogue aims to offer users an…

News

Tower of Wind

The project in the heart of Copenhagen pays homage to the world’s first meteorological observation station, the historic “Tower of Wind” in Athens.

News

Non-Fire Spread Classification

KLH® – CLT Exterior Walls receive Non-Fire Spread Classification in Poland

Technical Approvals, Certificates and Eco-labels

Our 
services.

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We are there for you.

+44 (0) 20 3031 8070
General Business: office@klhuk.com
Project Enquiries: enquiry@klhuk.com

KLH UK Limited
23 Jacob Street
London SE1 2BG

We really wanted to say thank you to everyone who has been involved in getting us this far. We have been really excited to see the structure go up and the on-site team have done an amazing job. The CLT looks great.

Mary & Klaus Morris | Blackwood House

I would like to record that I have been very impressed with your work on site and the efficiency of your construction team. The finished product is exactly as expected and was completed ahead of programme. Thank you for the efforts of your team.

David Spooner | Construction Project Manager | Hastings Pier Charity

Mayfield School are delighted with the new buildings. Innovative use of space and light in the atrium areas and other specialist classrooms will enhance the possibilities available to our staff and students.
The Sixth Form is designed not only to give a real feature (Heller-Up staircase), but is also a practical and useable large space which can be used by the whole school for various activities. The new building and external areas have created a real ‘WOW’ factor for our community as a whole.

Allison Greenwood | Deputy Headteacher | Mayfield School

The Mayfield School Project was delivered on time and within budget. It is to an excellent quality of workmanship which surpassed the expectations of the client team and the end user. The building’s design is rational, durable and above all maintainable which will ensure that Mayfield School will continue to provide teaching excellence within the London Borough of Redbridge.

Steve McConaghy | Senior Construction Project Manager| London Borough of Redbridge

I am the HT of a school in the UK which has been constructed using CLT. I am tremendously impressed with the very calm and purposeful learning environment that has been created. The students are so proud of the building and the exposed CLT is a major factor in this as it gives a high-end quality finish not common in schools in the UK. The CLT construction method enabled the building process to be rapid which was a major factor in us moving in on time.

Keir Smith | Head Teacher | William Perkin C of E School

We are completely delighted with the CLT!!! It’s been very exciting seeing our project in the factory and then going-up on site so quickly.
We love the exposed CLT walls and the character it gives the interiors – we can’t wait to move in. I think that the KLH team has been excellent throughout, from first contact, through the quotation stage to shop-drawings and the on-site erection crew – everyone has been very professional and helpful at all times. It has been a pleasure working with you all – I would be very happy to use KLH again in the future.

Ruth Butler | Ruth Butler Architects | Convent Lane

There is a great ambience in occupying a CLT school and it generates interest and a positive atmosphere with students, staff and visitors. Would definitely recommend it to another school.

Head Teacher | City Academy, Norwich

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