Cordrain is a geocomposite vertical drainage blanket which consists of a plastic cuspated inner core (cuspation on both sides) over wrapped with a heat-bonded, nonwoven geotextile filter fabric bonded on one side only. Cordrain has been specifically designed to: * effectively reduce hydrostatic pressure behind structure walls * provide an airlock between drainage layer and wall * assist in the waterproofing of structures * reduce the likelihood of structural damage caused by * foundation movements in expansive soils Cordrain typically eliminates the need for aggregate * or sand backfill * Lightweight and flexible * Easy to handle and quick to install How Cordain works Cordrain is wrapped with a heat-bonded non woven geotextile and in the vast majority of soils the geotextile ensures stable filtration of the adjacent soil. A soil filter develops within the first few millimeters between the soil mass and the geotextile. As water pas