RIW Ltd products

Cavity Drain R20 & R7 are used as internal cavity drainage membrane systems, to collect water entering the structure. Cavity Drain R20 and R7 are typically used in basements and sub-structures, to channel water ingress to a sump or collection point for disposal.

Double Drain is a cold applied, high density polyethylene profiled sheet, incorporating a permeable geotextile filter fabric, designed to prevent ground water reaching the structure.

Plaster Drain is an internal drainage membrane, used to channel water ingress to a sump or collection point for disposal or to separate new finishes from a damp wall.

Cavity drainage systems are designed to be fully maintainable, as this is a requirement for Type C (drained) protection as outlined in BS 8102:2009 Code of practice for protection of below ground structures against water from the ground.