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 · TW9, TW10
Basement waterproofing in Richmond.
Richmond has two distinct conditions within a short walk. The riverside sits on floodplain gravel in Flood Zone 3 with groundwater near the surface and direct tidal connection. Up on Richmond Hill you are into London Clay with a far lower table. We survey and specify for the property, never for the postcode.
Ground conditions
What sits beneath Richmond.
| Postcodes | TW9, TW10 |
|---|---|
| Geology | Thames floodplain gravels, with London Clay on Richmond Hill |
| Groundwater | Very high on the floodplain; Flood Zone 3 along the riverside |
| Housing stock | Georgian and Victorian town houses, riverside properties, large villas on the hill |
For riverside properties we design assuming the system will be tested — high-water alarms, twin pumps and battery backup, because the flood risk here is documented rather than theoretical.
Richmond is one of the areas we cover across West London.
Specification
Choosing the right system for Richmond.
BS 8102 sets out three forms of protection. Which one suits a property in Richmond 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 Richmond.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.