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

MaMaJu

A small shop with a strong commitment to sustainability.

Office Buildings

INSPIRE

A seven-storey building comprising office and service spaces

Multi-storey Residential Buildings

all.in99

29 condominiums spread over four floors

Refurbishment & Extensions

Homestead Ext.

A project that preserves history and fosters innovation.

Multi-storey Residential Buildings

Pallars

Eight-storey residential building with 42 apartments

Office Buildings

TRÆ

A 78-metre-high wooden building with 20 floors in Denmark

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.

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

Build in Wood

19.05 bis 20.05.2026

Danish Timber Construction Conference
Convention Center D15
Copenhagen, Denmark

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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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Carrefour International du Bois

02.06 bis 04.06.2026

International Timber Trade Show
Parc des Expositions de la Beaujoire
Grand Palais | Booth GP-E9
Nantes, France

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Sustainability Business Live

03.06 bis 04.06.2026

Australia’s biggest corporate & commercial sustainability event
Melbourne Convention & Exhibition Centre, Australia

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Futurebuild Australia

11.06 bis 13.06.2026

Main event for innovation, sustainability and next-gen construction, ICC Sydney
Booth 451, 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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BuildNZ

15.07 bis 16.07.2026

New Zealand’s leading trade event for the build, construction and design industries, Auckland Showgrounds
Booth J2, New Zealand

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Mass Timber+

06.10 bis 08.10.2026

Offsite Construction Conference
Pennsylvania Convention Center
Hall A | Booth 710
Philadelphia, 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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WCTE

15.08 bis 19.08.2027

World Conference on Timber Engineering
Edmonton Convention Centre
Canada

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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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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.