Bitumen membrane as a vapour barrier
The BITALBIT AL V4 bitumen waterproofing membrane is designed to provide a vapour barrier in flat roof systems. It can also be used for horizontal waterproofing against soil moisture and as a protection against the ingress of radon gas. The membrane is protected by a fusible polymer film on both sides. Installation using the welding method. The width of the overlaps should be 10 cm. The product complies with SIST EN 13970, 13969 (Type A) and SIST 1031.
Characteristics
- reinforcement: AL+glass fleece
- flexibility at low temperatures: ≤ 0 °C
- flow resistance at elevated temperature: ≥ +70 °C
- tensile strength: longitudinal ≥ 400 N/50 mm; transverse ≥ 300 N/50 mm
- elongation at break: ≥ 2 %/50 mm
- vapour barrier Sd value: > 1500 m
