About us

KLH Massivholz GmbH is the market leader for large-format cross-laminated timber elements, which are used and distributed worldwide as constructive wall, floor and roof elements under the brand name "KLH® - CLT".

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Cross
laminated
timber

 

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 further development 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 advancement, KLH continues to shape the landscape of modern timber construction.

References

Projects from different
categories and countries

Educational Buildings

Wen-Xian

Architecture that brings together learning and social interaction

Healthcare Buildings

Ronald McDonald House

Timber construction offering social benefits for families whilst their children are undergoing medical treatment

Single Family Houses

Private House

A two-storey detached house demonstrates the potential of KLH® – CLT in residential construction.

Public Buildings

Outdoor swimming pool

Outdoor swimming pool comprehensively and contemporary modernised

Refurbishment & Extensions

Universitätssternwarte

Modern workspaces and office facilities for newly appointed professorships

Educational BuildingsPassive Houses

TIGS

Australia’s first all-CLT Passivhaus school building, showcasing advanced mass timber construction, energy-efficient design, rapid installation, and innovative learning spaces.

Public Buildings

Sports Center

A modern sports center with a structural framework made of KLH® – CLT.

Refurbishment & Extensions

New Lodge Farm

A residential complex comprising four modern houses

Public Buildings

Penny

Modern retail premises built from cross-laminated timber

Refurbishment & Extensions

Museo del Mar

Restoration of a historic and listed building

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Without
registration,
anytime,
anywhere

KLH DESIGNER

data+ | statics2d | co2

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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

BUILDING MATERIAL FROM RENEWABLE WOOD

HEALTHY, COMFORTABLE INDOOR CLIMATE

NATURAL CARBON STORAGE

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 DURABILITY

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

Warsaw Home & Contract

21.10 bis 24.10.2026

International Contract Fair for Interior Design Industry
Ptak Warsaw Expo | Hall B | Booth B82
Nadarzyn, Poland

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Building Green

28.10 bis 29.10.2026

Focus on sustainability within architecture and building
Lokomotivværkstedet | Booth 67
Copenhagen, Denmark

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30th International Wood Construction Conference (IHF)

02.12 bis 04.12.2026

Practical experience – Practical application | Congress Innsbruck
Booth TF122, Austria

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BAU

11.01 bis 15.01.2027

World’s Leading Trade Fair for Architecture, Materials, Systems
Trade Fair Center Munich
Hall B5 | Booth 129, Germany

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International Mass Timber Conference & Expo

16.03 bis 19.03.2027

The largest gathering of mass timber experts in the world | Booth 832
Oregon Convention Center, USA

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Rebuild

16.03 bis 18.03.2027

The leading event for the off site construction, digitalization and sustainability
IFEMA – Madrid, Spain

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WCTE

15.08 bis 19.08.2027

World Conference on Timber Engineering
Edmonton Convention Centre
Canada

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BYGG REIS DEG

20.10 bis 23.10.2027

Scandinavian Building Exhibition
Exhibition Centre Nova Spektrum
Hall D | Booth D03-21
Lillestrøm, Norway

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News & Events

Publications

Timber Arch VOL. 05

With the fifth edition of Timber Arch, we are opening a new chapter in the world of timber architecture. It pays tribute to creativity, precision and…

News

KLH UK Raises £5,600 for St Catherine’s Hospice

KLH UK is proud to have raised £5,600 through the Paris cycle ride and London Bridges walk, supporting the incredible work of St Catherine’s Hospice.

News

Energy Straight from Our Own Roof

The new photovoltaic system with 4,200 modules supports the electricity supply for KLH® production at the Wiesenau site.

Publications

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

Publications

Timber Arch Vol. 03

We are all responsible for this one and future generations. If we want to address the challenges of climate change, the choice of materials and construction…

News

First rail shipment of KLH® – CLT to Norway

The KLH plant in Bad St. Leonhard, Carinthia, not only has the most modern automated production line, but also a very well-developed railway infrastructure with its…

News

Förderpreis.nachhaltig 2021

THIS YEAR, KÄRNTNER SPARKASSE AG’S SUSTAINABILITY AWARD GOES TO KLH MASSIVHOLZ WIESENAU GMBH AND WEISSENSEER HOLZBAUSYSTEMBAU GMBH

Publications

Timber Arch Vol. 02

Special times require special attention. Treat yourself to some time out and enjoy the following pages with us. Thanks to the editorial support of the respective…

Technical Approvals, Certificates and Eco-labels

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We are there for you.
+43 3588 8835
office@klh.at
Sites:
KLH Massivholz GmbH
Gewerbestrasse 4
A-8842 Teufenbach-Katsch KLH Massivholz Wiesenau GmbH
Wiesenau 2
A-9462 Bad St. Leonhard

Together with our customers, we are shaping the future of modern construction with timber– this drives us and makes us proud.

Marco Huter | Managing Director

With innovations and the continuous development of production technologies, we remain focused on the needs of our customers. Working with the renewable resource wood, we strive to develop innovative and economically viable solutions for modern timber construction.

Johann Hochegger | Managing Director

Research and development have always been integral to our approach. We strive to advance solid timber construction through innovative and efficient solutions, with careful consideration of economic and environmental aspects.

Johannes Habenbacher | Chief Technical Officer

We are there
for you.