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 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

Public Buildings

Hidden Creek

First Mass Timber Community Center in US

Public Buildings

Shelter for homeless women

Day and night centre for homeless women

Passive Houses

Castlemaine

Sustainable living comfort in a small space

Multi-storey Residential Buildings

Adaliahof

Residential building with 16 stylish apartments

Multi-storey Residential Buildings

Zac Paul Bourget

A model for sustainable construction in urban areas

Public Buildings

Wexl Base

The multifunctional building that adapts to its conditions of use.

Multi-storey Residential Buildings

Residential house Franklin

Timber hybrid house with 32 residential units

Multi-storey Residential Buildings

Kinnargata

A residential project with 19 houses in the heart of an Icelandic neighbourhood.

Single Family Houses

Boulder Bridge House

A house – with a view to the future

Refurbishment & Extensions

Refuge Wallon Marcadau

An energy self-sufficient building at an altitude of 1,866 meters

To the Overview

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

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

WCTE

22.06 bis 26.06.2025

World Conference on Timber Engineering
Brisbane Convention & Exhibition Centre | Booth 8 | 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
Hall D | Booth D03-21
Lillestrøm, Norway

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Mass Timber+

28.10 bis 30.10.2025

Offsite Construction Conference
Hynes Convention Center | Booth 605
Boston
USA

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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.

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 combat climate change, we will have to use even more wood in…

News

Sustainability in logistics

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…

News

AITIM Quality Mark

KLH holds the AITIM Quality Mark – SCA nº 31-01 for the Manufacture of Cross-Laminated Timber since 2007

News

Nordic Swan Ecolabel

In addition to the EPD (Environmental Product Declaration), KLH Massivholz GmbH has now also received the Nordic Swan Ecolabel (Licence No. 3010 0030), one of the…

Technical Approvals, Certificates and Eco-labels

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in your area.

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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 contributing to an eco-friendly and sustainable future– this drives us and makes us proud.

Marco Huter | Managing Director

With innovations and continuous development of production technology, we are always focused on the needs of our customers. Our responsible handling of the renewable and sustainable resource “wood” pursues the goal of managing ecological and economic challenges.

Johann Hochegger | Managing Director

Research and development have always been a part of our concept. We aim to use innovative, efficient and both economically and ecologically sustainable solutions in solid timber construction.

Johannes Habenbacher | Chief Technical Officer

We are there
for you.