Glidevale Protect A1® - Impermeable Roofing Underlay
Verified by manufacturer 4 months ago
1000 mm-wide rolls
1000 mm-wide rolls
BM Trada
Certificate type
Heavy-duty type HR impermeable roofing underlay, designed for all cold and warm pitched roofs.
Application
The product can be used for all pitched roof constructions (tiled and slated), whether the insulation is at ceiling joist level or at rafter level.
Description
Protect A1® is a heavy-duty type HR roofing underlay, designed for all cold and warm pitched roofs in conjunction with the provision of ventilation at eaves and ridge. The product can be used with a well-sealed ceiling and a separate air and vapour control layer on the warm side of the insulation or where the ceiling is not well-sealed as in a re-roofing application.
Features and benefits:
- Completely water and airtight.
- Third generation pitched roofing underlay developed to overcome the disadvantages of traditional Type 1F felts and second generation plastic sheet materials.
- Excellent nail tear strength and tensile strength.
- Has ‘unrestricted’ use for wind uplift in all exposure conditions in the UK and Ireland at 345 mm batten gauge (1732 Pa) without the need for additional sealing tapes.
- UV and heat resistant.
- Absorbent under surface prevents condensate drip-off.
- Embossed dark grey upper surface reduces glare and takes a chalk line marking.
- Does not generate noise under wind loading.
- Easy to cut, clean, light to handle and unaffected by temperature changes.
- CE marked and BM TRADA certified.
General information
Color | Grey |
Finish | Embossed |
Material | Polypropylene |
Shape | Rectangle Guidance for specification option: Roll. |
Length | 30000 mm Guidance for specification option: 1500 mm-wide. 45000 mm Guidance for specification option: 1000 mm-wide. |
Width | 1000 mm 1500 mm |
Uniclass | |
CAWS | H61/5 Roof slating H60/3 Roof tiling H62/3 Roof slating H64/10 Wood shingle/ shake roofing H65/10 Reconstituted slate roof tiling H60/120 Concrete roof tiling H60/105 Clay roof tiling H61/105 Roof slating H62/125 Roof slating H62/105 Roof slating H62/145 Roof slating H64/110 Wood shingle/ shake roofing H65/135 Ceramic slate roof tiling H65/105 Clay roof tiling H65/115 Concrete roof tiling H65/125 Reconstituted slate roof tiling H67/110 Metal roof tiling H67/5 Metal roof tiling H65/5 Roof tiling |
Product range |
Specification data - Plastics sheets
Material | Polypropylene. |
Purpose | Roofing underlay (impermeable). |
Standard | BS EN 13859-1, BS 5250, BS 5534; NHBC STANDARDS. |
Performance characteristics | |
Tensile strength (minimum) | Manufacturer's standard.Guidance for specification option: Machine direction (along roll):
Cross direction (across roll):
|
Tear resistance | Manufacturer's standard.Guidance for specification option:
|
Water vapour resistance (minimum) | 112 MNs/g. |
UV stabilization | Manufacturer's standard.Guidance for specification option: UV and heat ageing conditions: UVA lamps at 50°C for 336 hours followed by heat ageing at 70°C for 90 days. |
Third-party certification | BM TRADA Certified. |
Form | Non-woven, spunbonded.Guidance for specification option: Twin ply construction with a polymeric compositions, comprising of a polypropylene non-woven layer, coated on one surface with a continuous film of polypropylene / polyethylene blend |
Physical properties | |
Colour | Dark grey.Guidance for specification option: Embossed dark grey upper and lower surface. Printed with white product branding for ease of identification. |
Weight (minimum) | 145 g/m².Guidance for specification option: 7.5 kg per roll. |
Dimensions | |
Thickness (minimum) | 0.6 mm. |
Width (minimum) | 1000 mm. |
Roll length (minimum) | 45 m. |
Execution | Manufacturer guidanceInstalled below the primary roof covering onto rafters or sarking board. Roof space ventilation should be provided at both low and high level as with all impermeable (type HR) roofing underlays irrespective of insulation type or position. Please see our ventilation products on NBS or contact us for further information. |
Class (minimum) | W1. Guidance for specification option: >2.0m hydrostatic head of water resistance Manufacturer guidanceResistance to water penetration to BS EN 1928 |
Wind resistance | Zones 1–5. Guidance for specification option: Wind uplift resistance (at 345 mm batten gauge) and 600 mm rafter centres - 1732Pa |
Sustainability data
Contains Red List materials | No |
Country of product manufacture | United Kingdom |
Material | Polypropylene |
BIM objects
| Platform | Compatible | Version |
|---|---|---|
 Revit | - | 1 |
Third party certifications
BM Trada
Protect A1 BM TRADA Certificate No CPS-008
BM Trada
Protect A1 BM TRADA Schedule No CPS-008
Literature
Glidevale Protect A1®
BS 5250:2021 Management of moisture in buildings
Building Healthy Solutions for Offsite