RIW Double Drain 20m x 2m

Uses:

• Double Drain is typically used to isolate the structure from the surrounding soil and relieve hydrostatic pressure by promoting the flow of ground water
  away from the face of the structure (see Detail 1).
• Double Drain will not only provide excellent protection to the primary membrane against backfilling and root penetration, but can also increase the structures thermal insulation.
• Typical installations include external tanking, retaining walls, reservoirs and
  podium deck/terrace areas.