Breather membrane (WRB) for use behind ventilated pre-wall shells

Advantages

  • In accordance with DIN 68800-2: for timber wall structures behind ventilated pre-wall shells
  • Protects wall structures against moisture from the ventilation layer
  • Protects the building component during the construction phase: very resistant to driving rain
  • 3 months of outdoor exposure

Areas of application

For use as a slightly diffusion-inhibiting breather membrane (weather-resistive barrier, WRB) on mineral-fibre and wood-fibre insulating panels behind a ventilated masonry/brick exterior wall.

Technical specs

  Material
Protective and covering fleece Polypropylene microfibre
Functional film Monolithic polymer mixture
Property Value Regulation
Colour Anthracite
Surface weight 115 g/m² ; 0.38 oz/ft² EN 1849-2
Thickness 0.40 mm ; 16 mils EN 1849-2
Water vapour resistance factor µ 1 250 EN 1931
sd value 0.50 m EN 1931
g value 2.5 MNs/g
Vapour permeance 6.6 perms ASTM E 96
Fire class E EN 13501-1
Outdoor exposure 3 months
Water column 10 000 mm ; 32' 10" EN ISO 811
Watertightness, non-aged/aged* W1 / W1 EN 13859-2
Tensile strength MD/CD 220 N/5 cm / 150 N/5 cm ; 25 lb/in / 17 lb/in EN 13859-2 (A)
Tensile strength MD/CD, aged* 240 N/5 cm / 155 N/5 cm ; 27 lb/in / 18 lb/in EN 13859-2 (A)
Elongation MD/CD 85% / 85% EN 13859-2 (A)
Elongation MD/CD, aged* 60% / 60% EN 13859-2 (A)
Nail tear resistance MD/CD 125 N / 150 N ; 28 lbf / 34 lbf EN 13859-2 (B)
*) Durability after artificial ageing Passed EN 1297 / EN 1296
Flexibility at low temperature -40 °C ; -40 °F EN 1109
Temperature resistance Permanent -40 °C to 100 °C ; -40 °F to 212 °F
Thermal conductivity 0.04 W/(m·K) ; 0.3 BTU·in/(h·ft²·°F)
CE labelling Yes EN 13859-2
CE 12 EN 13859-2

UKCA

made in germany