Switzerland's first cellar made of wood



Building construction makes a decisive contribution to achieving climate targets if it completely dispenses with steel and concrete. The next logical step is to do without these building materials in basements. Together with Timber Structures 3.0 AG and other business partners, Timbatec has built Switzerland's first basement made of wood in Thun. Now your opinion is needed. Take part in our survey.

This pilot project is being intensively researched and accompanied by the Bern University of Applied Sciences BFH AHB. The joint commitment of leading innovators means that wooden basements can become the standard in the future.

Survey as part of a diploma thesis

There is great interest in the project, which is why a research project is now underway at the Bern University of Applied Sciences. After the project has been completed, a start-up company will be founded from among the business partners, which will appear on the market as a system owner and guarantor. Now we need your opinion on basements in timber construction. As part of the diploma thesis of Richard Wüthrich, the technician trainee of TS3, a survey is conducted to find out the needs of the users of basements in wood and the project participants.

Click here to access the survey. 

The survey will take a maximum of 10 minutes. The information you provide will be treated confidentially. Personal information is voluntary. Thank you for your participation!

Executive Summary Research Project

With the entering into force of the fire safety regulations 2015, it is possible to construct basements in wood. The new area of application was created with the removal of the non-combustibility requirement for structures under terrain. The system basements in wood revolutionizes today's concrete-heavy construction methods and uses the existing possibilities of current waterproofing technology for flat roofs and pond construction. Skillfully combined with the expertise of advanced timber construction companies, the proverbial more depth can be given to the wood.

Compared to the prefabricated concrete basements offered on the market, the system basements in wood does not require a floor slab in in-situ concrete, but is offered as a complete system. The interface between master builder and timber constructor is eliminated in favor of a gain in efficiency. Furthermore, the substitution of concrete with wood significantly reduces the gray energy of a building. By using a robust and prefabricated waterproofing system and prefabricated timber panel elements, the construction of a basement for a single-family house is possible within a few hours. This time saving is further increased by the dry construction method compared to on-site poured systems.

Keller aus Holz

Basements made of wood meet the nerve of the time. To date, Timbatec and TS3 have already received numerous inquiries. Until the new start-up is founded, such inquiries will be managed and planned by Timbatec.

Business modell

After completion of the research project, a start-up will be founded from the circle of business partners, which will appear on the market as a system owner and guarantor. The company will become part of Timbagroup Holding and is expected to be operational from 2023. They will have a specific wooden-basement-system on offer, that allows buildings to lie in sub terrain on up to four sides. The start-up delivers basements made of wood as a total contractor from the preliminary project to construction. The client can increase its turnover and added value by borrowing personnel and equipment, while eliminating a labor-intensive and error-prone interface with the basement in concrete. The risk is borne entirely by the newly formed company. On a secured pilot project, the assumptions are checked and adjusted, and the implementation is documented in a completely traceable manner.

The project in Thun

Ansicht und Schnitt Gebädue BMW15

The 25-meter-long and eight-meter-wide wooden structure stands on the basement with cross-laminated timber panels and is accompanied by an Innosuisse research project together with the Bern University of Applied Sciences BFH AHB Biel.

TS3 monocoque construction

The basement will be constructed entirely of cross laminated timber. All components will be joined in TS3 construction to form large-area panels, thus forming a monocoque. In the interior, non-load-bearing timber stud walls, basement compartment walls made of three-layer panels and load-bearing columns made of beech wood will be constructed.

Static concept

In the basement, vertical loads are transferred through the exterior walls and the row of columns (5 columns at 2.20 m from the rear wall). The ceiling above the basement serves as a full-area interception ceiling for the floors above. Horizontal forces are transferred to the floor slabs via the exterior walls. The floor slab is designed as a flat foundation without reinforcements. 

Layered structure 

The building envelope in contact with the ground consists of a compression-resistant insulation, several fleece and waterproofing layers laid outside the cross laminated timber panels. The cross-laminated timber panels remain visible and accessible on the inside. A moisture monitoring layer was installed over the entire surface to control the wood moisture in the cross laminated timber.

Fertiges Gebäude


Thun Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Niesenstrasse 1, 3600 Thun

Tel: +41 58 255 15 10


Zürich Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Ausstellungsstrasse 36, 8005 Zürich

Tel: +41 58 255 15 20


Delémont Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Avenue de la Gare 49, 2800 Delémont 

+41 58 255 15 40 


Bern Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Falkenplatz 1, 3012 Bern

Tel: +41 58 255 15 30



Headquarters Vienna (A) 

Timbatec Timber Construction Engineers GmbH
Im Werd 6/31a, 1020 Wien 
Tel: +43 720 2733 01



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