Apartment house Sommergasse 7, Allschwil
Addition of a floor to a residential building in timber element construction
The apartment building at Sommergasse 7 in Allschwil, built in 1954, was completely renovated and topped up.
The design called for the existing gable roof to be removed and the building to be raised with a new attic in timber construction. Roof loads are transferred from rafters to a ridge, two center purlins and the knee walls. There are four dormers on each side of the roof so that the new attic can accommodate two separate living units.
Building physics, building environment control,
Seismic safety, reconstruction,
Structural engineering
Your contact person
Moritz Müllerleile-Haas
Deputy Head of Renovation, Earthquake Engineering I
+41 61 317 64 79
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Gruner Lüem AG
St. Jakobs-Strasse 199
CH-4020 Basel
