DS1 DUO Vapour Control Layer

3.5 mm technically advanced self-adhesive elastomeric bitumen vapour barrier with patented “DUO” lap technology. The product features thermally activated bitumen stripes to provide the bonding compound for the insulation boards.

DS1 DUO bitumen vapour barrier membrane

Technical Data
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Roll size 1.08 x 7.5m
Surface finish Top: Foil & mica
Bottom: Release film over self-adhesive bitumen
Weight 4.5Kg/m²
Thickness 4mm
Reinforcement Polyester coated aluminium foil & 60g/m2 glass fleece 
Tensile strength (EN 12311-1) Length ≥ 400N/50mm
Diagonal ≥ 400N/50mm
Elongation (EN 12311-1) Length ≥ 2%
Diagonal ≥ 2%
Heat stability (EN 1110) +70°C
Cold bending (EN 1109) -25°C