The extension is dissociated from the existing building, but is bound by a fully glazed volume. It is constructed of a concrete frame and covered (sloping roof and walls of the floor) with green pre-patinated copper. The choice of using the copper solution was motivated by the desire to build decidedly contemporary way, despite the use of a material that has played a major role in the history of civilizations and construction.
Also, the owner wanted by the choice of copper, remember the job of his parents related to a luxury and accuracy ironwork. The choice of colour is part of a respectful approach to the very green landscape environment of medium mountains of the massif central of france, and the desire to link with the garden and its plants, which are reflected, randomly, on the panels copper.