Perforated underlay consisting of a strong Glass fibre base coated with oxidised bitumen, and a sand finish on both sides.
Sand finish on both surfaces
Venting layer in a built up roofing system
34kg 20m rolls
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Specification Details for 3H (Liquid Applied Systems)

Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Rose Roofing is consulted before specifying.

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