In the Openly Valley project, innovative box girder ceilings with clay infill were used. This special ceiling construction combines cavities with solid structures, making it particularly light yet extremely stable.

A box girder ceiling also offers the possibility of storing energy efficiently: With Openly 1, around 70 % of the energy is stored in the ceilings.

The clay serves both to regulate moisture and as an additional energy store.

The entire house has a modular design and can be assembled using simple plug-in and screw connections.

The hollow box ceilings consist of prefabricated elements. Schöb AG, a leading Swiss family business in the field of timber system construction, developed an innovative press for this project. This can be used to efficiently produce ceiling elements in various sizes.

LB clay ceilings are being used for the first time in the Openlys built in 2026. These have a clay layer on the underside and are delivered prefabricated for around €250/m².

Further information from our team

Upon request