Externally applied water management system, used to protect and drain the basement or structure.
RIW Double Drain is a cold applied impermeable high density polyethylene profiled sheet incorporating a permeable geotextile filter fabric designed to prevent ground water reaching a structure and enhance the performance of the waterproof membranes. It can be used in conjunction with a primary waterproofing system or on its own 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 to land drainage. The product is CE marked and can also be used to provide excellent protection to a primary waterproofing system against backfilling and mechanical damage.
Not to be used as a primary membrane.
Fixing to vertical/ sloping surfaces:
70 mm overlaps, with geotextile fabric-patch bonded with bonding tape.
Prevents ground water reaching structure; Isolates structure from surrounding earth; Eliminates necessity for granular backfill; High drainage capacity; High impact resistance, providing protection to the primary membrane
High density polyethylene (HDPE)
2 x 15 m
RIW Limited’s waterproofing products will, subject to normal service conditions, provide an effective barrier to the transmission of liquid water and water vapour for the life of the building in which they are incorporated., The products must be installed in accordance with RIW written instructions, and following installation must not be subjected to any damage or long-term UV exposure
J40/295 Geocomposite studded cavity drainage/ venting membrane
RIW Double Drain
RIW Adhesive Tape
|Top edge protection|
RIW Top Edging Strip
|Standard product features|
2.3 L/second maximum.
Deformation under long term loading:
RIW Adhesive Tape is a 150 mm double sided tape for adhering the RIW Double Drain to the primary membrane, and for re-adhering the geotextile fabric at overlaps.
Top edge protection:
RIW Top Edging Strip is a medium density profiled polyethylene sheet which protects the top edge of the RIW Double Drain and prevents clogging.