Basement Waterproofing

New basement construction and conversions are becoming increasingly popular as the cost of land and housing rises, but are you prepared for the waterproofing challenges they can bring?

Basement waterproofing experts

Millions of pounds’ worth of warranty claims have been made for failed below-ground waterproofing projects in recent years, and we’ve worked closely with insurance companies and the National House Building Council to put those failed projects right. However, getting our expertise from the design stage means your project’s in safe hands from the outset. Our surveyors offer expert thinking on soil topography, groundwater conditions and/or movement, hydrostatic pressure and water tables to ensure your basement remains damp free.

How Can We Help You

Watertight Guarantees

Guardian offer a 10 year Guarantee for our workmanship. Everything we do is built to endure, but if the worst should happen, we offer a 10-year insurance-backed guarantee.

Design Liability

We are design experts in our industry, following British Standards for waterproofing BS102-2022, which means we can take on the liability of our design work.

CPD Seminars

We offer free RIBA CPDs on Waterproofing delivered by our experts, to keep you and your team up to date with industry changes.

Cost Savings

Maintaining a watertight property can significantly enhance its market value and appeal to potential buyers or tenants.


Guardian have been offering their expertise to clients for over 45 years and have experience with clients across the South West and UK.

No Split Liability

By taking design liability and providing the full supply and installation package for your waterproofing project, we take full responsibility.

Case Studies

Why People Love Us

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Got questions about Guardian Waterproofing or a project in mind? We’d love to chat and hear from you!

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