IKO PERFORATED SAND UNDERLAY

IKO Perforated Sand is a venting underlay consisting of a 60g/m2 glass fibre base coated with oxidised bitumen. It is sand finished on both surfaces. The perforations are nominally 25mm in diameter, postitioned at approximately 75mm to 85mm apart throughout the roll.

IKO Perforated Sand Underlay is sometimes used (loose laid) to provide a controlled partial bond to a substrate, when the subsequent layer is fully bonded in hot bitumen, in a built-up roofing system.

Roll weight: 34kg. Roll size: 20m x 1m.

(Formerly BS747 Type 3H)