Brief description of the system: the thermoadhesive waterproofing membrane in elastoplastomeric distilled bitumen polymer VAPORDIFFUSER STRIP/V will be torch-bonded to the clean and dry laying surface, with 40% of the lower face coated with bands of elastomer thermoadhesive which, adhering only partially by torch-bonding, will allow the damp trapped in the support to diffuse, avoiding bubbles and condensation. The sheets will be unrolled on the flat part until reaching about 30 cm from the corner between the flat and vertical surfaces, and will be overlapped 10 cm longitudinally with a 15 cm overlap transversally at the end. After aligning and rearranging the sheets, they will be bonded by heating the lower face of the sheet with a propane gas torch, activating the adhesive properties of the bands of thermoadhesive. The overlaps of the sheets will be torch-bonded at the same time. The distilled bitumen polymer membrane will then be torch-bonded in full adhesion to the entire surfaces and the projecting parts. The sheets of membrane unrolled parallel to the line of maximum pitch, should be overlapped 10 cm longitudinally and 15 cm at the top, and continuously torch-bonded to the substrate and along the overlaps. They will also be turned up and torch bonded to the vertical parts. The upper layer of the waterproof covering will be composed of a distilled bitumen polymer waterproofing membrane with CE marking in accordance with UN EN 14695 for laying under bituminous conglomerate. The sheets on the second layer will be laid overlapping by 10 cm longitudinally and 15 cm transversally, across the overlaps of the first layer, and torch-bonded to the whole surface and the overlaps. The waterproof covering is turned up on the vertical parts at a height of least 20 cm above the level of the paving.