Iko Perforated Sand Surfaced Underlay (Formally Type 3H) 20 x 1m - British Building Supplies

Iko Perforated Sand Surfaced Underlay (Formally Type 3H) 20 x 1m

A venting underlay consisting of a strong glass fibre base coated with oxidised bitumen. It is sand finished on both surfaces The perforations are nominally 25mm in diameter, positioned at approximately 75mm to 85mm apart throughout the roll

Iko Perforated Sand Surfaced Underlay (Formally Type 3H) 20 x 1m

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