RIW is one of the UK's leading manufacturers of professional waterproofing, damp proofing and gas protection systems. Designed for both new-build and refurbishment projects, RIW products provide reliable protection against water ingress, rising damp, hydrostatic pressure and harmful ground gases, making them a trusted choice for contractors, waterproofing specialists and structural engineers.

Our RIW range includes Type A structural waterproofing membranes, Type C cavity drainage systems, basement waterproofing products, gas barrier membranes, damp proof courses (DPCs), drainage membranes, bentonite waterproofing systems, primers, repair mortars, tanking coatings, waterstops and waterproofing accessories. Every product is designed to deliver long-term performance while meeting the demands of residential, commercial and civil engineering projects.

Whether you're waterproofing a basement, protecting foundations, installing a cavity drain system, treating rising damp or creating a complete gas protection system, RIW offers proven solutions that comply with current UK building regulations and BS 8102 best practice.

Browse our complete range of RIW waterproofing products, backed by expert technical advice, competitive pricing and fast UK delivery.

Why Choose RIW?

• Basement waterproofing systems
• Type A, Type B & Type C waterproofing solutions
• Gas barrier and radon protection membranes
• Damp proof courses and DPM systems
• Cavity drainage membranes and accessories
• Cementitious tanking coatings and repair mortars
• Waterproofing primers, tapes and ancillaries
• Suitable for residential, commercial and civil engineering projects
• Expert technical support
• Fast UK delivery

Find the right RIW waterproofing solution for your next project and order online today.