12mm Roof Drainage System
16 m2
Uses: Reservoir/Drainage board specifically designed for green roofs.
Water Attenuation 1.5 ltrs/m2
Protection of Waterproofing Membrane
Filtration
Separation
HDPE core allows both water attenuation and drainage.
In addition there is a pre bonded filter fleece to both sides.
Been used for one year. In perfectly good working order.
Perfect for shed or a bike store.
16 m2 of 12 mm drainage medium for Green Roof (Cobham Tilt KT11)
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