METHOD FOR ARRANGEMENT OF WATERPROOF ROOFING Russian patent published in 1996 - IPC

FIELD: civil engineering. SUBSTANCE: for better ventilation and waterproofing properties and removing excess moisture from under upper layer of roofing structure, 8-10 mm diameter pipes with through holes in their walls are inserted in roofing base for each 3-4 m² to 50-100 mm depth. Pipes are made of strong non-rusting material such as polyethylene, stainless steel, etc. Pipe ends are open to atmosphere. EFFECT: high waterproofing properties. 1 dwg 2 tbl