This multi-family building, built in 1982, is the result of a retrofit intervention, with a forth-floor extension, which is characterized by the change in its appearance thanks to the use of coloured photovoltaic modules which allow the facade to assume an homogeneous appearance as the “active” parts are not immediately recognizable. The PV modules have a matte surface and this causes a reduction of the solar power output by about 39% as the green/grey colour is given by the front glass.
View of the building before the retrofit
Dummy modules were used on 2% of the total surface area of the facade.
|Active solar surface
|Active solar surface ratio
|Building skin application
The existing 4-storey residential building was a 2-shell masonry with an intermediate insulation of 8 cm.
For static reasons, the perimeter wall could not fulfil the requirements of the new cold facade and was therefore completely removed. The aim of the project was to develop a building envelope, which was not only the protective, aesthetic and energetic layer but would also serve as an energy supplier.