Switzerland's first basement made of wood



Timbatec has been committed to timber construction for over 20 years. Our vision is to build entire cities entirely from wood. In Thun, the first apartment building with a basement made of wood is currently under construction. We invite you to a virtual tour of the construction site in german on December 04, 2020 at 16:00.

The construction industry has a responsibility and must significantly reduce its CO₂ emissions to comply with the Paris Climate Change Convention. This can only be achieved by dispensing with steel and concrete in building construction. Timbatec gladly accepts this challenge. We have been consistently dispensing with concrete for ceilings since 2014. Instead, we use dry-bound fillers. The next logical step is to avoid using concrete in basements and for the floor panel. Today it is reality: We are building the first basement completely out of wood. 

Keller aus Holz

The first wooden basement in Switzerland

There is a lot of CO₂ in the basement

For the basements and underground car parks, basements are usually built for secondary projects. These have also been in concreted in wooden buildings until now. Concrete consists of grit and cement as binders and it has to be reinforced with steel. Cement production alone is responsible for 5-8 % of the worldwide CO₂ emissions. One cubic metre of armoured concrete causes around 500 kg of CO₂ emissions. The situation is completely different with wood: This naturally renewable building material requires only solar energy and water. Over the life cycle of the building, each cubic metre of wood stores around one ton of CO₂. In the "Crocodile" building complex in Winterthur, 6418 tons of CO₂ are stored in the used wood - roughly the same amount was emitted during the production of the concrete for the basement floors. Is this really necessary? Timbatec thinks: No!

First wooden basement for an apartment building in Thun 

Product development has always been part of Timbatec's DNA. With new products and technologies we are one of the pioneers in timber construction. We are thus part and driver of the timber construction success story. In Thun, the first apartment building with basement and floor plate made of wood is currently being built. Cross laminated timber boards lie on a 160 mm thick insulation board. A black insulation encases the wood for moisture protection. TS3 joints connect the individual CLT panels with each other. The Timber Structures 3.0 technology, or TS3 for short, is a process that can generate large areas from wood. For this purpose, cross laminated timber manufacturers pre-treat the front sides of the panels in the production plant with a primer and sealing tapes. On site, the panels are poured with a two-component polyurethane casting resin without pressure. The same construction was chosen for the floor panel.

Keller aus Holz, Stirnseiten Vorbehandelt

The front sides of the base panels are pre-treated and the segments are prepared for TS3 pouring  

Virtual construction site tour and informational event 

Would you like to know more about basements in timber construction? During the virtual construction site tour on December 04, 2020 at 16.00 we will give an insight into this project. We will be happy to answer your questions during the following discussion round. Please register for this event at mara.boegli@ts3.biz. Further informationen will follow.

Here you can see the time lapse of how the basement was built:

Installation work in time lapse. You can find the webcam of the construction site here. 

Research project «DeepWood» 

In the apartment building in Thun, it is not only the wooden basement that is an innovation. The building is also the Living Lab of a research project in the field of digital planning and BIM (Building Information Modeling). The "DeepWood" research project, together with the Lucerne University of Applied Sciences and Arts and the Berner Fachhochschule BFH AHB, is developing the basis for simultaneously and team-oriented cooperation. The building in Thun was planned with the 3DX platform from Dassault Systèmes using CATIA. Initial findings show the strengths of the integrated project space: there are no interface problems to be solved. In order for the new approach to timber construction to establish itself, well-designed processes, routines and templates are needed - from planning and collaboration to automatic plan output and machine control. 



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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