device for keeping the lueftungsquerschnitts a bivalve badger, procedures to restore a bivalve badger and fuehrungskeil for implementation of the procedure.

摘要

1. A device for maintaining the ventilation air gap between the upper side of a thermal insulation (8) disposed between the rafters (9) of a finished two-skin roof and the underside of the outer roof skin (1), consisting of elements (13a) laid side by side in the squares in the direction of the slope of the roof, said elements being open at both ends and provided with large openings (16) and snugly filling in the ventilation air gap, characterized in that the elements (13a) consist of substantially rigid, right parallelepiped hollow boxes (13) and the openings (16) are provided in both covering surfaces of the elements (13a).