Reinforced bitumen sheets for multiplayer roof waterproofing. Bitumen waterproof underlay roofing membrane traditional bonding felt is intended for waterproofing as an underlay in the multilayer roofing covers (on dimensionally stable roofs, not subject to vibration or settling). Membrane bonded to substrate with glue in temperatures above +5. Do not bond to substrate mechanically. Not applicable as a cover single layer, not interested for roofing under vegetable cultivation. Reinforced with fibre. Mass consists of oxidised bitumen, upper surface and underside covert with sand topping.
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