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Permavent Graphite Breathable Roofing Underlay - Vapour Open Roofing Membrane

Name: Permavent Graphite Breathable Roofing Underlay - Vapour Open Roofing Membrane
Brand: Permavent Ltd
SKU: ba5YJv57pEp7Es2QFDCvmS

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Untaped 50

Permavent Ltd

High performance vapour-permeable roofing membrane.

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+44 (0)1305 766703 Website

Application

Suitable for use in all pitched roofing applications.

Description

Permavent GRAPHITE is a high-performance vapour-permeable membrane. GRAPHITE is a versatile secondary waterproofing barrier, which exceeds the requirements of BS 5534:2014+A2:2018 code of practice for slating and tiling for pitched roofs and BS 5250:2021 Management of moisture in buildings.

Features and benefits:

Highly durable.
Excellent tensile strength.
Excellent tear resistance.
BBA certified.
UV stable for three months.
Suitable for all types of solar panel installation.
Taped version
- Built‑in double tape speeds up laps and seals, reducing overall membrane usage by up to 25%
- Ideal where labour or tape compatibility is a concern.
Untaped versions
- Maximum flexibility to pair with your preferred tape or adhesive detailers.

Suitable for UK Wind Zones

Taped Lap 1-5
Batten Lap 1-3

General information

Color	Grey
Material	Polypropylene Guidance for specification option: Non-woven.
Shape	Rectangle
Length	50000 mm
Width	1000 mm 1500 mm
Warranty description	15 year

Uniclass	Pr_25_57_10_94 Vapour-permeable sheetsPrimary
CAWS	H62/235 Vapour-permeable underlay H64/307 Vapour-permeable underlay H67/290 Vapour-permeable underlay H31/280 Breather membrane P10/320 Breather membrane H61/22 Vapour-permeable underlay H65/22 Vapour-permeable underlay H64/22 Vapour-permeable underlay H67/24 Vapour-permeable underlay H65/235 Vapour-permeable underlay H61/235 Vapour-permeable underlay H60/235 Vapour-permeable underlay H31/55 Breather membrane H91/305 Vapour-permeable underlay P10/65 Breather membrane H60/22 Vapour-permeable underlay

Specification data - Vapour-permeable sheets

Class (minimum)	W1.
Third-party certification	British Board of Agrément (BBA) certificate.
Performance criteria	-
Water vapour properties	Water vapour resistance (Sd): 0.02 m.
Fire performance	Reaction to fire: To BS EN 13501-1, Class E.
Tensile properties	To BS EN 12311-1 (MD/ CD), 245/ 175 N/50mm.
Material	Polypropylene, non-woven.
Form	Spun-bonded.
Weight (minimum)	130 g/m².

Roll size	1.0 x 50 m.
Nail shank	To BS EN 12310-1 (MD/ CD), 130/ 140 N.
CoverageArea	50 m².
Elongation	MD/ CD, 50/ 60%.

Sustainability data

Contains Red List materials	No
Country of material origin	United Kingdom
Country of product manufacture	United Kingdom
Material	Polypropylene Guidance for specification option: Non-woven.
Recyclability	Recyclable
Recycled content As defined in clause 7.8 of BS EN ISO 14021	100 %
Expected Life	Lifetime