Addition of another floor to MFH "In der Ey, Zürich

The project
During the extensions and additions, great importance was attached to affordable, yet ecological construction methods. In order to create more living space, one floor was added to the existing building. This made it possible to create a total of four new residential units. The new roof is designed as a gable roof with tow hatches. The roof cut-outs allow for new roof terraces. Thanks to the significantly optimized soundproofing measures and the large balconies, the apartments are now much more cozy and comfortable.

The construction
The interior walls are partly timber frame and partly cross laminated timber. The latter rest on the concrete slab at certain points for load distribution (see purple lines on the reverse). The roof is constructed with rafter purlins and the roof slab with three-layer panels. Exterior and apartment partition walls as well as the staircase are of solid construction.

The challenge
The span direction had to be chosen longitudinally to the shape of the building (rafter purlins). Thus, the canopies had to be attached to the exterior wall. Another challenge was the design of the canopy, since fire protection regulations do not allow combustible materials to be passed over the fire wall.