Summary
Air and vapour permeable underlay membrane designed for use on pitched roofs and with vertical tiling/ slating.
Air and vapour permeable underlay membrane designed for use on pitched roofs and with vertical tiling/ slating.
Application
It is intended for use as a pitched roof underlay (vapour permeable roofing felt) and is fixed beneath tiles and slates.
It is intended for use as a pitched roof underlay (vapour permeable roofing felt) and is fixed beneath tiles and slates.
Description
A triple layer spun-bonded polypropylene breather membrane designed for use as an underlay over airspaces without other means of ventilation.
Features and benefits:
- Water and UV resistant.
- Low vapour resistance.
- Air Permeable.
- NSAI and BBA Certified.
- Hydrophobically treated.
- Eliminates low and high level ventilation.
- No vapour control layer required.
- Supplied in 1 x 50 m and 1.5 x 50 m rolls.
- UKCA and CE marked.
A triple layer spun-bonded polypropylene breather membrane designed for use as an underlay over airspaces without other means of ventilation.
Features and benefits:
- Water and UV resistant.
- Low vapour resistance.
- Air Permeable.
- NSAI and BBA Certified.
- Hydrophobically treated.
- Eliminates low and high level ventilation.
- No vapour control layer required.
- Supplied in 1 x 50 m and 1.5 x 50 m rolls.
- UKCA and CE marked.
Digital objects
Color
Green
Green
Material
Polypropylene
Polypropylene
Shape
Other
Other
Length
50000 mm
50000 mm
Width
1000 mm, 1500 mm
1000 mm, 1500 mm
Specification
Standard
To BS EN 13859-1.
To BS EN 13859-1.
Class (minimum)
W1.
W1.
Material
Triple layer spun-bonded polypropylene.
Triple layer spun-bonded polypropylene.
Form
Non-woven spunbond.
Non-woven spunbond.
Third-party certification
British Board of Agrément (BBA) certificate. NSAI Certification (Ireland).
British Board of Agrément (BBA) certificate. NSAI Certification (Ireland).
Weight (minimum)
185 g/m².
185 g/m².
Thickness (minimum)
0.75 mm.
0.75 mm.
Reflective face
No reflective faces.
No reflective faces.
Additional properties
Reaction to fire
Class E or better when tested to EN 11925-2.
Class E or better when tested to EN 11925-2.
TensileStrength
MD 390 N/50 mm-1; CD 230 N/50 mm-1 when tested to EN 12311-1.
MD 390 N/50 mm-1; CD 230 N/50 mm-1 when tested to EN 12311-1.
Tear resistance
MD 230 N; CD 275 N when tested to EN 12310-1.
MD 230 N; CD 275 N when tested to EN 12310-1.
Elongation
MD 55%; CD 75% when tested to EN 12311-1.
MD 55%; CD 75% when tested to EN 12311-1.
Air permeability
34.4 m³/m².h.50Pa when tested to EN 12114.
34.4 m³/m².h.50Pa when tested to EN 12114.
Size:
1 x 50 m., 1.5 x 50 m.
1 x 50 m., 1.5 x 50 m.
Water vapour resistance
Sd = 0.013m when tested to EN 12572.
Sd = 0.013m when tested to EN 12572.
Vapour resistance
0.065 MNs/g when tested to EN 12572.
0.065 MNs/g when tested to EN 12572.