Bitumen membrane as a vapour barrier
The BITALBIT ALV plus bitumen waterproofing membrane is made of elastomeric bitumen. It is protected by a fusible polymer film on both sides. Installation using the welding method. The width of the overlaps should be 10 cm. It is designed to provide a vapour barrier in flat roof systems. It can also be used for waterproofing against soil moisture and as a protection against the ingress of radon gas. The product complies with SIST EN 13970, 13969 (Type A) and SIST 1031.
Characteristics
- reinforcement: AL+glass fleece
- flexibility at low temperatures: ≤ -15 °C
- flow resistance at elevated temperature: ≥ +100 °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
