Iko Perforated Sand Surfaced Underlay (Formally Type 3H) 20 x 1m
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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
|Material||Bitumen - Glass Fibre|
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