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 · SW19, SW20
Basement waterproofing in Wimbledon.
Wimbledon splits into two very different jobs. On the hill, the sandy Claygate Member holds perched water above the London Clay and delivers it laterally into basement walls. Down towards the Wandle valley, river gravels and a genuinely high water table mean hydrostatic pressure from below. The same specification will not serve both.
Ground conditions
What sits beneath Wimbledon.
| Postcodes | SW19, SW20 |
|---|---|
| Geology | Claygate Member over London Clay on the hill; river gravels below |
| Groundwater | Perched water in the Claygate sands; higher table towards the Wandle |
| Housing stock | Large Victorian villas on the hill, Edwardian terraces, 1930s semis |
The substantial Victorian villas around the Village and the Common are strong candidates for full-depth conversion — generous footprints and enough head height to work with once the floor is lowered.
Wimbledon is one of the areas we cover across South London.
Specification
Choosing the right system for Wimbledon.
BS 8102 sets out three forms of protection. Which one suits a property in Wimbledon 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 Wimbledon.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.