Renovation and new construction of the Cormanon school complex, Villars-sur-Glâne

The project
Time has not passed the Cormanon school complex from 1965 without leaving a trace. The buildings no longer met the structural requirements and also needed to be thermally renovated. Timbatec was commissioned to analyze the structural framework of the timber truss roof. The timber engineers determined that the roofs of two school buildings were in such poor condition that they needed to be reinforced and partially replaced. Construction method: In order to plan the new roof elements into the existing support structure, Timbatec measured the building three-dimensionally with a total station. This made it possible to fit the elements precisely during assembly. For the thermal refurbishment, 200 mm thick insulation was applied to the existing solid walls. Prefabricated wooden elements were attached to the walls. The cellulose insulation was blown into these elements. A rear-ventilated Eternit panel serves as the outer cladding.

The construction
In contrast to the two school buildings, the renovation of the dilapidated gymnasium and the connecting wing was no longer worthwhile. The hall, which had even been closed off recently, was demolished and rebuilt on the existing foundation using the timber construction method. The glulam trusses, which form the gable roof, were placed on the facade supports. The exterior walls as well as the roof of the hall, for which Timbatec was responsible among other things for the statics, were built in timber frame construction and prefabricated as elements. The bracing interior walls are made of cross laminated timber. The new two-story connecting wing was also built of wood.

The challenge
The renovation work had to be carried out while the school was still in operation. Complex work such as raising the roof had to be planned so that it could be carried out during the school vacations.