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Permavent Graphite Breathable Roofing Underlay - Vapour Open Roofing Membrane

Verified by manufacturer 8 days ago

Untaped 50

Permavent Ltd Variant:

High performance vapour-permeable roofing membrane.

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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

SKU Code

GRAPHITE50

GTIN/EAN

5060747290190

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

Literature

GRAPHITE - Declaration of Conformity

GRAPHITE - Declaration of Conformity

GRAPHITE 50 Datasheet

GRAPHITE 50 Datasheet

GRAPHITE 75 Datasheet

GRAPHITE 75 Datasheet

GRAPHITE 75 Taped Datasheet

GRAPHITE 75 Taped Datasheet

GRAPHITE 50 Taped Datasheet

GRAPHITE 50 Taped Datasheet

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