Thermal insulation box for insulating opening of access trapdoor to attic space/loft in dwelling house, has cases delimiting empty space, and linear insulation and sealing elements fixed on lower support area of lower open face of box

摘要

The box (1) has cardboard outer and inner cases (2, 3) stacked with each other with respective open faces i.e. lower faces (4, 5) oriented in same direction, so as to form the box with double wall. A lower open face (11) forms a free space (12) emerging by an opening (13), where the lower open space is formed by combination of the open faces of the cases. The cases delimit an empty space broken into a side empty space (14a) and an upper empty space (14b). Linear insulation and sealing elements (29) are fixed on entire lower support area (17) of lower open face of the box.