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

Educational Buildings

Bowdoin College

two new buildings combining aesthetics and efficiency

Hotels

Holmen Husky

Dog sledding trips with overnight stays in lavvu cabins

Single Family Houses

Wilson

Two identical main houses, each with an additional residential unit (ARU)

Public Buildings

Potawatomi

Forest County Potawatomi Community Centre combines culture and modern construction.

Hotels

IKUNA Naturresort

Educational Buildings

IES Serra de Noet

School building consists of three clearly structured building sections

Single Family Houses

Yangpyung Studio

Openness in a small space

Educational Buildings

Daycare Center Hofstetten

Two-group daycare center in solid timber construction

Single Family Houses

Lined House

Public Buildings

Hidden Creek

First Mass Timber Community Center in US

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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

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

15. Forum International Bois Construction (FBC)

25.02 bis 27.02.2026

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

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7th Forum Wood Building Baltic

26.02 bis 27.02.2026

Wood Architecture and Timber Construction
Vilnius Gediminas Technical University
Lithuania

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MMC Ireland National Conference

05.03.2026

Trends, technologies and innovations in Irish offsite construction
The Johnstown Estate, Meath, Ireland

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Rebuild

24.03 bis 26.03.2026

The leading technology event for construction
IFEMA – Madrid | Booth 10F677
Spain

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International Mass Timber Conference

31.03 bis 02.04.2026

The largest gathering of mass timber experts in the world | Booth 833
Oregon Convention Center | USA

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HOUTBOUW

19.05 bis 21.05.2026

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

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Futurebuild Australia

11.06 bis 13.06.2026

Main event for innovation, sustainability and next-gen construction, ICC Sydney
Booth 353, Sydney, Australia

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4. Süddeutscher Holzbau Kongress (SHK)

01.07 bis 02.07.2026

Timber Construction Congress
Schwabenlandhalle
Fellbach, Germany

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Mass Timber+

06.10 bis 08.10.2026

Offsite Construction Conference
Pennsylvania Convention Center
Philadelphia, PA
USA

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19. Europäischer Kongress (EBH)

07.10 bis 08.10.2026

19th European Conference
Urban Timber Construction
Kongresszentrum Gürzenich Cologne
Germany

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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 Timber Construction Forum (IHF)

02.12 bis 04.12.2026

From practice – for practice
Congress Innsbruck
Austria

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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

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…

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 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.