… Other …
Classification opinions
… in, or covered on both sides by, a layer of asphalt, the whole being covered on one side with copper or aluminium … the upper side, a weatherproofing element consisting of a sheet of paper board covered on both sides with bitumen or … polystyrene core of a thickness of 20 mm, forming a heat and sound insulating layer. See also Opinions 4811.10/2 …