RIW Double Drain Data Sheet
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.
Structural Drainage System
Double Drain can be used in conjunction with a primary waterproofing system, or on its own, to isolate the structure from the surrounding soil. The product is designed to relieve hydrostatic pressure, by promoting the flow of ground water away from the face of the structure to land drainage.
Double Drain can also be used to provide excellent protection to a primary waterproofing system, against backfilling and mechanical damage.
Typical Uses of Double Drain
- External Tanking
- Retaining Walls
- Podium Decks
- Planters
Features & Benefits of Double Drain
- Good impact resistance
- Relieves hydrostatic water pressure
- High drainage capacity
- Quick and easy to install
- Isolates structure from surrounding earth
Double Drain Downloads
DOD geocomposite membrane
DOD NPDrain
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Last Updated: 2026-03-22
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