The project presents a mixed structure: the enveloppe is a wooden frame, heavily insulated, whereas the interior shear wall is made of local limestone (« pierre de savonnières ». The glue-laminated absorption beams have three areas of support: the two longitudinal wooden walls and the central stone wall. The cladding is a three layer braid: two six centimeters vertical layers of larch tree, arranged in quincunx, separated by a horizontal galvanised steel blade. This system procures a certain thickness to the cladding system without risking to over expose the rain screen. The façade is animated by a dance between the light and shadows, punctuated with the shiny metal blades that contrast with the matte aspect of the wooden slats which will become greyer with time..