Cover unit, in particular, for concrete walls comprises two wall plates kept at a specified distance from one another, with at least one wall plate made of an inorganic material letting through moisture

摘要

The cover unit, in particular, for concrete walls comprises two wall plates (12,14) kept at a specified distance from one another by distance pieces (16). At least one of the wall plates consists of an inorganic material which lets through moisture, is substantially free from fibers and/or is not combustible, or is poorly inflammable.