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Glidevale Protect A1® - Impermeable Roofing Underlay

Verified by manufacturer 24 days ago

1000 mm-wide rolls

BPD Building Product Design Ltd Variant:
Third party certifications:
  • BM Trada

    BM Trada

    Certificate type

Heavy-duty type HR impermeable roofing underlay, designed for all cold and warm pitched roofs.

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+44 (0)161 905 5700 Website

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

Roll.

Length

30000 mm

1500 mm-wide.

45000 mm

1000 mm-wide.

Width

1000 mm

1500 mm

Uniclass

Pr_25_57_65_60 Plastics sheetsPrimary

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

Impermeable Underlays

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.

Machine direction (along roll):

  • 287 N/50mm: Unaged tensile strength to BS EN 12311-1 with mods.
  • 285 N/50mm: Aged tensile strength to BS EN 12311-1 with mods.

Cross direction (across roll):

  • 238 N/50mm: Aged tensile strength to BS EN 12311-1 with mods.
  • 274 N/50mm: Unaged tensile strength to BS EN 12311-1 with mods.

Tear resistance

Manufacturer's standard.

  • 230 N: To BS EN 12310-1 with mods, along roll.
  • 234 N: To BS EN 12310-1 with mods, across roll.

Water vapour resistance (minimum)

112 MNs/g.

UV stabilization

Manufacturer's standard.

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.

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.

Embossed dark grey upper and lower surface. Printed with white product branding for ease of identification.

Weight (minimum)

145 g/m².

7.5 kg per roll.

Dimensions

-

Thickness (minimum)

0.6 mm.

Width (minimum)

1000 mm.

Roll length (minimum)

45 m.

Execution

Installed 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)

Resistance to water penetration to BS EN 1928


W1.

>2.0m hydrostatic head of water resistance


Wind resistance

Zones 1–5.

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

BIM objects

Platform Compatible Version
Revit
-

1

Third party certifications

BM Trada

BM Trada

Protect A1 BM TRADA Certificate No CPS-008

BM Trada

BM Trada

Protect A1 BM TRADA Schedule No CPS-008

Literature

Glidevale Protect A1®

Glidevale Protect A1®

BS 5250:2021 Management of moisture in buildings

BS 5250:2021 Management of moisture in buildings

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