As the former naval barracks is a listed building, the BDA applied strict rules, particularly for the reconstruction of the roof area. The old roof structure, which rested on massive concrete supports for many years, had to be removed. The new substructure consists of a steel primary framework with a wooden secondary structure. The result is a classic lightweight structure on which the 19-by-40-cm tiles are mounted.
“We had to adhere strictly to the existing shape of the roof and were not allowed to make it even one millimetre higher or wider. The basic requirement of the monument authority was that the form of the roof had to remain visible even during construction”, says Reisinger-Schöbel. This was also a very unusual project at other levels. “We started by installing flood protection, which we had to reconcile with the building’s preservation order. In addition, we have changed the function of the building and created new floor plans. We have never built a roof of this size before”, says Kutscher. “A lot of exciting aspects came together in this project”.