Permavent Apex Air/ Vapour Permeable Roofing Underlay - Pitched Roof Underlay
Verified by manufacturer 3 days ago
Taped 50
Taped 50
Three-layer air and vapour open membrane for use as a pitched roof underlay.
Application
Pitched (10–70°) roof underlay.
Fully compliant with BS 5534: 2014 + A2 2018 and an integrated tape allows APEX to be installed in all UK wind zones.
Description
A three-layer breather membrane for use as a pitched roof underlay. Permanent APEX is a vapour and air permeable membrane providing unique condensation control which eliminates the need for low or high level ventilation. It also provides a secondary barrier to water ingress.
Permavent APEX membrane is fully compliant with BS 5534: 2014 + A2 2018 and an integrated double tape allows APEX to be installed in all UK wind zones.
Features and benefits:
- BBA certified for use in cold non-ventilated, cold ventilated and warm non-ventilated pitched roof systems, up to 70°.
- Air and vapour permeable membrane, 180 g/m².
- Integrated tape reduces membrane usage by up to 25%.
- For use on any types of roofing/ walling applications.
- Highly water resistant with W1 rating to EN 13589.
- UV stable for three months.
- Supplied in 1 x 50 m rolls.
- Untaped version is also available.
General information
Color | Blue Guidance for specification option: Upper face; lower face is grey. |
Material | Polypropylene |
Shape | Rectangle |
Length | 50000 mm Guidance for specification option: Standard roll length. |
Width | 1000 mm 1500 mm Manufacturer guidanceStandard roll widths. |
Uniclass | |
CAWS | H91/305 Vapour-permeable underlay H60/235 Vapour-permeable underlay H61/235 Vapour-permeable underlay H62/235 Vapour-permeable underlay H64/307 Vapour-permeable underlay H65/235 Vapour-permeable underlay H67/290 Vapour-permeable underlay P10/320 Breather membrane H31/55 Breather membrane P10/65 Breather membrane H60/22 Vapour-permeable underlay H61/22 Vapour-permeable underlay H64/22 Vapour-permeable underlay H65/22 Vapour-permeable underlay H67/24 Vapour-permeable underlay H31/280 Breather membrane |
Specification data - Vapour-permeable sheets
Standard | To BS EN 13859-1 and BS 5534:2014 + A2 2018. |
Third-party certification | British Board of Agrément (BBA) certificate 23/6867, Product Sheets 1 and 2. |
Performance criteria | |
Water vapour properties | To EN 12572, Sd: 0.01 m. |
Fire performance | Reaction to fire: To EN 13501-1: Class E. Guidance for specification option: MD: Machine direction; CD: Cross direction. |
Tensile properties | To BS EN 12311-1 (MD/CD), 330/ 270 N/50mm. |
Class (minimum) | W1. |
Material | Polypropylene. |
Form | Three-layer composite with integral double-sided self-adhesive tape. Manufacturer guidanceAlso available without tape; consult manufacturer for details. |
Weight (minimum) | 180 g/m². |
Thickness (minimum) | Manufacturer's standard. |
Roll size | 1 x 50 m. Manufacturer guidanceWidth x length. |
Adhesive | Integral double sided self-adhesive tape. |
Air permeability | To EN 12114, >20 m³/m²·h at 50 pa. |
Tear resistance | To EN 12310-1 (MD/ CD), 210/ 210 N/50mm. |
CoverageArea | 50 m². |
Flexibility at low temperature | To EN 13859-1, -40°C. |
Sustainability data
Contains Red List materials | No |
Country of material origin | United Kingdom |
Country of product manufacture | United Kingdom |
Material | Polypropylene |
Recyclability | Recyclable |
Literature
APEX50U-072023
APEX75U-072023
APEX50-072023-1
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