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, ceiling and roof elements under the brand name "KLH®".

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Cross
laminated
timber

Take inspiration from the wide variety of KLH Projects

The first Edition of Timber Arch.

The collection of KLH projects presenting modern, individual timber construction architecture and the versatility of wood as a building material.

What is the best way to present modern, individual timber construction architecture and the versatility of wood as a building material?

That was the fundamental question in the creation of „Timber Arch Vol 01“ and the answer is simple. These are the completed projects that confirm the potential of massive timber construction – technically, ecologically, economically and, above all, creatively.

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2nd KLH
CLT FACTORY

In 2019 KLH Massivholz Wiesenau GmbH has started building of new cross laminated timber plant in Wolfsberg in Carinthia (Austria). The commissioning of the plant with an annual capacity of around 150,000 m³ in the final expansion stage is planned for mid-2020.

This project is co-financed by the ERDF European Regional Development Fund.
 
 
The latest production technology used in the new plant will safeguard the competitiveness and market share of the Johann Offner Group in the field of cross laminated timber, increase the degree of prefabrication of the cross laminated timber produced and create up to 83 new jobs in the structurally weak Wolfsberg region.

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

To the Overview

2019 A+Awards
Jury Winner

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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, CEILINGS AND ROOFS

COMBINABLE WITH ALL MATERIALS

EPD
in acc. with
ISO 14025
& EN 15804

Environmental
Product Declaration

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Events & Exhibitions

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 | Booth 26
Cologne, Germany

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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

Publikationen

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.

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…

Technical Approvals, Certificates and Eco-labels

Find a partner
in your area.

To the interactive map

We are there for you.

+43 3588 8835
office@klh.at

KLH Massivholz GmbH
Gewerbestrasse 4
A-8842 Teufenbach-Katsch

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.