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Extension Bernapark, Deisswil



The former cardboard factory in Deisswil near Bern is beginning a new era. Thanks to the wooden multi-storey top-up and the conversion of the existing factory buildings, a new quarter is created.

Aerial view during the construction zoom
Aerial view during the construction
Aerial view of the finished building zoom
Aerial view of the finished building
Balcony view zoom
Balcony view
Interior view of the finished flat zoom
Interior view of the finished flat

The Project

In Deisswil near Bern, more than 250 employees once produced cardboard for the whole of Switzerland before those responsible shut down the machines in 2010.

Today, a new quarter is being built with 173 apartments for around 300 residents as well as 25,000m² of office and commercial space.

The venerable factory buildings are still of good quality.

They were therefore not demolished, but refurbished and converted, and extended by two stories with a wooden extension. In this way, a new, diverse neighborhood was created. For more information, visit

The Construction

The listed factory buildings consist largely of reinforced concrete structures with large window fronts. For the extension, wood is used almost exclusively: all walls and floor slabs are made of prefabricated wooden elements.

The Challenges
The elevation always had to adapt to the winding factory buildings. Consequently, the derivation of the acting forces is not quite trivial. The structural engineers defined points where the forces of the extension could be introduced. Different load-bearing directions of the floor elements with sometimes large spans were the result. Stuberholz called in Timbatec for the development of the demanding structural analysis concept and for quality assurance.

Construction Data

- 173 Apartments

Construction costs

- BKP 1-9: approx. 55 million Swiss francs

- BKP 214: 7 million Swiss francs

Prestations de Timbatec

- SIA Phase 32 Construction project
- SIA Phase 51 Implementation project
- SIA Phase 52 Design

GHZ Architekten AG,
3123 Belp

Building Owner
Berna Industrie- und Dienstleistungspark AG,
3066 Stettlen

Timber Construction Engineers
Timbatec Holzbauingenieure Schweiz AG,
3012 Bern

Timber Construction
Stuber & Cie AG,
3054 Schüpfen

Civil Engineer
ingenta ag,
3006 Bern

General Contractor
Implenia Schweiz AG,
3000 Bern

Nils Sandmeier, 2501 Biel


  • Neues Quartier dank Aufstockung in Holzbauweise, Bernapark Deisswil

    New district thanks to extension in timber construction method, Bernapark Deisswil

    Espazium, Stadt aus Holz, Issue No. 6/2020 - In the former cardboard factory in Deisswil near Bern, a new quarter with 173 rental apartments is being built. The timber construction engineers from Timbatec Bern were responsible for the statics of the extension. (Report in german)

  • Starker Wandel mit wenig Eile

    Strong change with little hurry

    Immobilien und Energie, Issue No. 3/20 - What do you need to keep in mind during the transition from old to new? In the east of the capital city of Bern, a private investor demonstrates how a former industrial site becomes the matrix of a dense and multi-purpose settlement location. (Report in german)

  • Zur zweiten Chance

    The second chance

    mikado - On the site of the former cardboard factory in Deisswil, a new showcase quarter is being built. Two new floors will be added in woodframe construction extended and converted into apartments. Please read the article from (Report German)

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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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