| http://www.w3.org/ns/prov#value | - According to FIG. 15 it is also possible to put an insulating external shell 39 on the external wall of the building, said external shell comprising, for example, of an inner layer 41 of concrete or the like, an intermediary layer 42 of insulating material like mineral wool or the like, and an external layer 43 consisting for example also of concrete or any other material like wood or marble.
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