The existing building presented a very large and high entry hall with the rooms arranged around it, and it was always necessary to walk through it to move around the house. On the ground floor, the kitchen, dining room, living room and the stube were not proportioned to the size of the house and they couldn’t get enough light. For this reason the entire ground floor has been demolished, and a new interior clear glass envelope with a gyp wall inserted is now the only separation among the different spaces. Few new volumes have been added around the house to extend the entry hall and the oversized family room, which include dining, relax and study areas. To allow the maximum amount of light into the rooms, the façades have been replaced by a custom designed structural silicon curtain wall, with base and head mullions flush with the floor and ceiling, and large pop-out sliding doors to create interaction between indoor and outdoor. Because of the very low temperatures of the winter, the heating solution is the combination of radiant floor heating, perimeter floor radiators along the curtain wall, a gas see-through-the-outside fireplace and a wood one.