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50+ Years
experience
Your Trusted Partner for Structural Waterproofing
Established in 1924, RIW has built a century-long reputation as a leader in structural waterproofing solutions. Our expertise spans the design, supply, and application of advanced waterproofing systems for below-ground and above-ground structures. We specialise in delivering tailored technical advice, preparing sectional details, approving drawings, and providing comprehensive site inspections and ongoing support. With a commitment to innovation, we have adapted to evolving industry standards while maintaining the reliability our clients expect.

Our nationwide network of specialist contractors ensures expert installation of our systems, and our technical team remains available for consultations, offering guidance on compliance with standards like BS 8102:2022. Through decades of experience, we have become a trusted partner in safeguarding structures against water ingress, combining technical excellence with a client-focused approach.
Services
Waterproofing Below Ground Gas Proofing Basement Tanking Damp Proof Membranes Cavity Drain Systems
Details
  • Year established: 1924
Highlights and features
  • We offer 100 years of expertise in structural waterproofing solutions.
  • Our team provides technical advisory services and site inspections nationwide.
  • We maintain a network of approved specialist waterproofing contractors.
  • We ensure compliance with updated standards like BS 8102:2022.
  • Our systems are designed for durability in challenging environments.
Services
Waterproofing Below Ground
Our below-ground waterproofing systems protect structures from water ingress using advanced materials like Krystol Internal Membrane and Cavity Drain Systems. These solutions comply with BS 8102:2022 standards, ensuring durability for critical infrastructure such as data centres and museums. Clients benefit from tailored technical guidance and nationwide contractor support.
Gas Proofing
Gas-proofing solutions prevent harmful gas migration in contaminated land projects. Systems like Gas Seal Black and Structureseal GPT create impermeable barriers, ensuring safety for residential and commercial developments. Technical support includes site-specific design and compliance with environmental regulations.
Cavity Drain Systems
Cavity Drain Membranes manage water ingress in basements by channeling water to drainage points. Systems like Double Drain Plaster Drain combine structural integrity with moisture control, ideal for retrofitting in historic buildings or modern developments requiring low-maintenance waterproofing.
Questions
What waterproofing systems do you offer?
We provide Krystol Internal Membrane, Cavity Drain Systems, and Gas Seal products for below-ground and above-ground applications.
Are your systems compliant with UK standards?
Yes, our solutions meet BS 8102:2022 requirements for waterproofing below-ground structures.
Do you offer technical support?
Yes, we provide site inspections, drawing approvals, and technical advisory services nationwide.
Can I find local contractors for installation?
We work with a network of approved specialist waterproofing contractors across the UK.
How do I access product data sheets?
Download technical documents via our website or contact our technical team directly.