Type A
Barrier protection
Cementitious slurries and spray applied membranes, forming a continuous barrier against the structure. Suitable where the structure is sound and the head of water is modest and well understood.
Hand & spray applied
Areas we cover · W8, W11, SW7
Basement waterproofing in Kensington.
Much of Kensington sits on London Clay, which is comparatively kind to below-ground work — but the made ground above it, accumulated over two centuries of building and rebuilding, holds perched water that catches out systems designed only for the clay beneath.
Ground conditions
What sits beneath Kensington.
| Postcodes | W8, W11, SW7 |
|---|---|
| Geology | London Clay, with localised gravel spreads |
| Groundwater | Moderate in the clay, but perched water is common in made ground |
| Housing stock | Stucco-fronted Victorian town houses, garden squares, mews properties |
The stucco town houses around the garden squares almost all have original lower-ground floors. Bringing these up to a properly dry, habitable Grade 3 standard is often better value than excavating new space under RBKC policy.
Kensington is one of the areas we cover across Central London.
Specification
Choosing the right system for Kensington.
BS 8102 sets out three forms of protection. Which one suits a property in Kensington depends on the water head, the condition of the structure and what you intend to use the space for.
Type B
Structurally integral
Water-resistant concrete construction, with joints and service penetrations designed as part of the structure. Usually the route for new basements and underpinned extensions.
New build & underpinned structures
Type C
Drained protection
Cavity drain membrane, perimeter channel and a pumped discharge. It manages water instead of resisting it, and it remains maintainable — which is why it suits most conversions of existing cellars.
Maintainable · Grade 3 habitable
Nearby
We also work in these areas.
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Book a survey in Kensington.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.