Diffusion-open, weldable roofing underlay membrane
Advantages
- Reliable seam sealing: homogeneously weldable
- Excellent occupational safety: non-slip and abrasion-resistant surface
- Suitable as a roofing underlay to meet the most stringent requirements
- Maximum protection: diffusion-open, rainproof against driving rain, and highest hail-resistance HR 5 (Swiss VKF/AEAI directive) and as per EN 13583
- Easy to work with: robust with extremely high tear-resistance
- Also keeps structural elements dry during the construction phase: excellent protection against driving rain thanks to monolithic functional film
Areas of application
For use as a 3-ply diffusion-open, homogeneously weldable, rainproof/watertight roofing underlay membrane. Suitable for installation over pressure-resistant subsurfaces, e.g. timber sheathing, wood-based panels and wood-fibre underlay panels.
Technical specs
Material | |||
Functional film, both sides | Monolithic TPU | ||
Backing fleece | Polyester | ||
Property | Regulation | Value | Regulation |
Colour | Blue | ||
Surface weight | EN 1849-2 | 350 g/m² ; 1.15 oz/ft² | EN 1849-2 |
Thickness | EN 1849-2 | 0.8 mm ; 31 mils | EN 1849-2 |
Water vapour resistance factor µ | EN ISO 12572 | 225 | EN ISO 12572 |
sd value | EN ISO 12572 | 0.18 m | EN ISO 12572 |
g value | 0.9 MN·s/g | ||
Vapour permeance | ASTM E 96 | 18.2 perms | ASTM E 96 |
Fire class | EN 13501 | E | EN 13501 |
Outdoor exposure | Cen./Nth. Europe & Canada/Nth. US: 6 months ; RoW: 4 months | ||
Driving rain test | TU Berlin, GHS | Passed | TU Berlin, GHS |
Hail resistance | EN 13583 | Passed | EN 13583 |
Hail impact resistance | VKF / AEAI | Class HR 5 | VKF / AEAI |
Minimum roof pitch | 3° | ||
Suitable as temporary roof covering (Germany) | ZVDH | Yes | ZVDH |
Water column | EN ISO 811 | > 4 000 mm ; > 13' 1" | EN ISO 811 |
Watertightness, non-aged/aged* | EN 13859-1 / EN 1928, GHS | W1 / W1+ | EN 13859-1 / EN 1928, GHS |
Tensile strength MD/CD | EN 13859-1 (A) | 320 N/5 cm / 400 N/5 cm ; 37 lb/in / 46 lb/in | EN 13859-1 (A) |
Tensile strength MD/CD, aged* | EN 13859-1 (A) | 275 N/5 cm / 320 N/5 cm ; 31 lb/in / 37 lb/in | EN 13859-1 (A) |
Elongation MD/CD | EN 13859-1 (A) | 50% / 70% | EN 13859-1 (A) |
Elongation MD/CD, aged* | EN 13859-1 (A) | 50% / 70% | EN 13859-1 (A) |
Nail tear resistance MD/CD | EN 13859-1 (B) | 200 N / 200 N ; 45 lbf / 45 lbf | EN 13859-1 (B) |
Durability after artificial ageing | EN 1297 / EN 1296 | Passed | EN 1297 / EN 1296 |
Flexibility at low temperature | EN 1109 | -20 °C ; -4 °F | EN 1109 |
Abrasion-resistance | GHS | Passed | GHS |
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 | EN 13859-1 | Yes | EN 13859-1 |