Dimpledrain is a geocomposite drainage core. It’s made up of a durable, heat-formed, cuspated synthetic sheet that is bonded on the cusp side, to a nonwoven bidim filter / separator layer to form a drainage core.
The structure of the symmetrical cusps, resists the effects of lateral shear which may adversely affect alternative ‘pillar type’ drainage cores. The flat reverse side and top ensure low contact pressure and therefore prevents the creation of point loads. The bidim layer acts as a filtration layer …. This is significant when Dimpledrain is placed between or over waterproof lining systems.