173 Alfa Rufol UDB-A 165 SK (self-adhesive roofing underlay)
roofing underlay, sarking membrane, sheathing membrane. Has the same characterisitcs as Alfa Rufol UDB-A 165 but with two additional self-adhesive strips.
A-classified roofing underlay for pitched roofs with two self-adhesive strips
Alfa Rufol UDB-A 165 SK is the A-classified (ZVDH), driving rain-proof, highly diffusion open roofing underlay (sarking membrane / sheathing membrane) with two integrated self-adhesive strips. It is to be applied above the thermal insulation. Suitable for the direct installation ontop of the thermal insulation. Thanks to the double sealing strips, Alfa Rufol UDB-A 165 SK prevents the penetration of humidity (e.g. due to driving snow) and the penetration of dirt into the insulation.
The 3-layer structure protects the functional membrane from damages and reduces the slipping risk for the processor.
Easy handling: Auxiliary lines allow exact overlaps, the self-adhesive strips a windtight sealing.
- Meets the requirements of ZVDH and EnEV!
- With two integrated self-adhesive strips
- Highly diffusion open
- Driving rain-proof
- UDB-A / USB-A according to ZVDH
- Weight 170 g/m²
- Temperature resistance -40 up to +100°C
- Tear resistance (nail) >200 N/50mm
- Fire behaviour class E (EN 13501-1)
- sd-value 0,02m
- Watertightness W1 (EN 13895-1)