Heat insulation for building structures, in particular heat-insulating unit

摘要

The heat insulation has an insulating layer of high resistance to water vapour diffusion, consisting for instance of polyurethane or some other rigid foam. Diffusion windows are arranged in the insulating layer in the form of clearances through the latter, extending transversely to the extent of the surface. These diffusion windows are filled with an insulating material which has an only low diffusion resistance, but great thermal insulation.