Pioneers in the production of
cross laminated timber

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since 1997.

We pioneered the manufacture of cross-laminated timber (Kreuzlagenholz – KLH®, CLT, X-LAM) and have developed the product in cooperation with the Technical University of Graz in 1996. After many years of research and development, we opened our production facility in Teufenbach – Katsch in 1999 and have gradually extended it. 

We operate internationally which is why our large-formate KLH® solid timber boards are not just used in Europe, but all across the globe as wall, ceiling and roof elements in structural timber construction. KLH Massivholz GmbH is fully owned by Johann Offner Unternehmensgruppe, a traditional family business with a history of more than 250 years.


The sensitive handling of environmental and energy issues has increasingly moved the use of wood as a renewable construction material into the foreground of modern, ecological building culture. And for sound reasons: Timber is naturally carbon-neutral and energy-efficient in every respect.

Constructing with KLH® is therefore a valuable contribution to climate and environmental protection. With its PEFC certification, KLH® guarantees to exclusively source the valuable raw material of wood from sustainably managed forestry. 

In the production of its solid timber boards, KLH® focusses on contemporary, energy-saving and environmentally friendly production methods. Their production is also entirely harmless for our employees and has no effects harmful to human health whatsoever. KLH® solid timber boards comply with emissions class 1. They can be unhesitatingly disposed of thermally and do not leave behind more residue than non-laminated timber when burned.


Our service offerings range from general technical advice, structural pre-measurement of KLH® solid timber boards, the assessment of building components from a structural physics perspective all the way to the development of project-specific construction details. Research and development have always accompanied us in the process. Upon request, we also support our customers with the creation of works plans and project optimisation. Precisely cut to fit in the factory, the elements are delivered directly to the construction site.

We see ourselves not just as a manufacturer, but rather as a project partner for architects, construction engineers and executing companies. We also gladly serve as advisers for private and public clients in the development of plans for the construction of a solid timber structure.

Our customers value us as a reliable partner in demanding timber construction of lasting value and can capitalise on our more than 20 years of experience.

Technical Approvals, Certificates and Eco-labels


As a project partner, we see our co-operative attitude as an essential part of our philosophy. As a team, we work across departmental disciplines, both internally and externally.


Sonja Moder

Head of Business Development,
Int. Project Management,
Group Marketing

2019 A+Awards
Jury Winner

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News & Events


Förderpreis.nachhaltig 2021



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…


New London Awards 2020 Winner

The Observatory Block at Graveney School has become a WINNER of the New London Awards 2020 Learning​ Category


AITIM Quality Mark

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


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…


CEO Today Global Awards 2020

Sonja Moder has been selected as an outright winner for this year’s CEO Today Global Awards.

We are there for you.

+43 3588 8835

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

We want to prove our know-how and long-term experience on international level and expand our technology leadership.

Sonja Moder | Int. Projectmanagement | Business Development

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 | Managing Director

We always strive to fulfil our customers’ needs. We follow a solution-oriented approach and gladly share our vast of experience. In addition, we constantly strive to improve the availability and energy efficiency of our machines and systems.

Gernot Knapp | Head of Technical Purchasing, Maintenance

We are always looking ahead and open to new developments. Our core values are commitment, competence and partnership.


Elisabeth Judmaier | Head of Financial Department

As a market leader we know our product inside out. As a team, we work inter-departmental and across country borders.

Erich Dorfer | Head of Operations

We are there
for you.