Verified by manufacturer 2 months ago
1000 mm-wide rolls
Heavy-duty type HR impermeable roofing underlay, designed for all cold and warm pitched roofs.
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.
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:
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
Roofing underlay (impermeable).
BS EN 13859-1, BS 5250, BS 5534; NHBC STANDARDS.
Tensile strength (minimum)
Machine direction (along roll):
Cross direction (across roll):
Water vapour resistance (minimum)
UV and heat ageing conditions: UVA lamps at 50°C for 336 hours followed by heat ageing at 70°C for 90 days.
BM TRADA Certified.
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
Embossed dark grey upper and lower surface. Printed with white product branding for ease of identification.
7.5 kg per roll.
Roll length (minimum)
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.
Resistance to water penetration to BS EN 1928
>2.0m hydrostatic head of water resistance
Wind uplift resistance (at 345 mm batten gauge) and 600 mm rafter centres - 1732Pa
Contains Red List materials
Country of product manufacture