Glidevale Protect Wunderlay® - 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 Wunderlay 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.
- UV and heat resistant.
- Good nail tear and tensile strength for its weight.
- Does not generate nuisance noise under wind loading.
- CE marked and BM TRADA certified.
- Absorbent under surface prevents condensate drip off.
- Embossed dark grey upper surface reduces glare and takes a chalk line marking.
- Easy to cut and handle.
- Achieves Zones 1-4 at 345 mm batten gauge (1367Pa), when tested to Annex A of BS 5534, ensuring wide coverage across the UK and throughout Ireland
- Achieves Zones 1-5 at 310 mm batten gauge (2145 Pa).
- Developed to overcome the disadvantages of traditional Type 1F and 5U felts and second generation plastic sheet materials.
- Provides a secondary line of defence against wind-driven rain and snow and resistance to wind uplift.
General information
Color | Grey |
Finish | Embossed |
Material | Polypropylene |
Shape | Rectangle Guidance for specification option: Supplied as a Roll |
Length | 30000 mm Guidance for specification option: 1500 mm widths only. 45000 mm Guidance for specification option: 1000 mm widths only. |
Width | 1000 mm 1500 mm |
Uniclass | |
CAWS | 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 H65/105 Clay roof tiling H65/115 Concrete roof tiling H65/135 Ceramic slate roof tiling H65/125 Reconstituted slate roof tiling H67/110 Metal roof tiling H61/5 Roof slating H60/3 Roof tiling H62/3 Roof slating H67/5 Metal roof tiling H65/5 Roof tiling H64/10 Wood shingle/ shake roofing H65/10 Reconstituted slate 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:
|
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, spunbondedGuidance for specification option: Twin ply construction 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. Printed with product branding for ease of identification. |
Weight (minimum) | 120 g/m².Guidance for specification option: 6 kg per roll. |
Dimensions | |
Thickness (minimum) | 0.49 mm. |
Width (minimum) | 1000 mm.Manufacturer guidance45 m². |
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. |
Flexibility at low temperature | -40°C. |
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 1-4. Guidance for specification option: Wind uplift resistance (at 345 mm batten gauge) and 600 mm rafter centres - 1367 Pa. Wind uplift resistance across the UK and Ireland - Zones 1-4 at 345 mm batten gauge to BS 5534. |
Accessories | Glidevale Protect FV250. Glidevale Protect SV609. Glidevale Protect In-line vents. Glidevale Protect G range vents. |
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 Wunderlay BM TRADA Certificate No CPS-001
BM Trada
Protect Wunderlay BM TRADA Schedule No CPS-009
Literature
Glidevale Protect Wunderlay®
BS 5250:2021 Management of moisture in buildings
Building Healthy Solutions for Offsite