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RIW has been a generic term for waterproofing solutions for over 90 years; our name even stands for ‘Remember It’s Waterproof’ from an old ad slogan in 1921. RIW offers the most expert technical advice for commercial waterproofing and damp proofing applications above, below and at ground level. From basement tanking, podium decking, raised access floors and plant rooms to lift pits and movement joints – RIW provides the best design advice on your waterproofing strategy. We provide complete structural waterproofing systems, including liquid and sheet applied solutions, drained cavity systems and cementitious products. If you need technical advice on superstructures, damp proof membranes, decks or roofs, call RIW. Our in-house structural engineers and technical advisors offer a full consultation and design service including preparation of sectional details, approval of drawings, site inspections and ongoing site support. We also work closely with a nationwide network of Specialist Waterproofing Contractors who can provide fully guaranteed installation of our systems. RIW provide waterproofing solutions from basement to roof.
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RIW Aqua Channel
PVC drainage conduit designed for use with RIW Cavity Drain systems.
- J40 Flexible sheet waterproofing/ damp proofing
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RIW Aqua Pump Pro
A range of pumps etc. designed to remove ground water from RIW Cavity Drain systems.
- J40 Flexible sheet waterproofing/ damp proofing
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RIW Cavity Drain R20
An internal water management system, used to collect water ingress through walls and floors in basements and substructures. The system provides Type C (drained) protection in accordance with BS 8102: 2009.
- J40 Flexible sheet waterproofing/ damp proofing

Quality Assurance

RIW is certified to the following Quality Assurance schemes/standards:
BBA Certificate 02/3953 – Structureseal tanking
BBA Certificate 05/4213 – Sheetseal 9000 DPC
BBA Certificate 05/4232 – Cavity drain
BBA Certificate 89/2278 – Liquid asphaltic composition
BBA Certificate 92/2817 – RIW Sheetseal waterproofing membrane

Trade names

Cavity Drain
Cementfill FC
Cementfill HB
Double Drain
Liquid GM
RIW Toughseal
Sheetseal 9000

Contact details

580-581 Ipswich Rd,
Slough, SL1 4EQ
Tel +44 (0)1344 397777