A kindergarten extension in timber construction creates space

In the Kronbühl school complex of the Wittenbach primary school, the existing kindergarten was renovated and expanded to include an extension built using timber elements. Four new classrooms were created, two of which are located in the extension. The classrooms and group rooms are now split over two floors, giving the building a total volume of 900 m3.

Both the geometry of the two-storey extension and the shape of the roof adapt to the conditions of the existing building. The shape of the ground floor incorporates the existing classroom and creates a new communal space with a mobile partition wall and a kitchenette. The top floor houses a spacious classroom with a projecting balcony.

The interior was designed entirely with visible timber surfaces, and the walls and ceilings were clad with three-layer spruce boards. Furthermore, the ceiling cladding was implemented with acoustic perforation.

The complex building geometry with the projecting structure on the top floor required a clever static solution and precise planning, production and assembly. All the work was carried out by our specialists: the 3D timber construction planning, the static calculations, the construction planning and assembly process, as well as the implementation of the entire interior design with special ceiling acoustics.

Portrait Lukas Osterwalder Division Manager Modular Construction Blumer Lehmann

Lukas Osterwalder

Division Manager Timber and Modular Construction | DE | AT | LU
Member of the Executive Board

+41 71 388 58 20
Exterior view of the cube-shaped projection on Wittenbach Kindergarten’s top floor; balcony

An airy classroom in the new projecting structure on the top floor.

Timber staircase in Wittenbach Kindergarten, which now features a projecting balcony in addition to an extra classroom on the top floor.

Stairs to the additional classroom on the top floor.

Looking into the classroom on the top floor of the kindergarten in Wittenbach

The extension created a spacious classroom in the kindergarten.

Interior view of the classroom in the converted Wittenbach Kindergarten. The room’s walls, floor and ceiling are made of timber. The room can be split into two with a folding wall.

The abundance of timber makes for a healthy indoor climate in the classroom.