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 · SW1V
Basement waterproofing in Pimlico.
Pimlico sits low, close to the Thames, on permeable river terrace gravels. That combination is the one that most often catches people out in central London: the gravels are hydraulically connected to a tidal river, so groundwater moves and responds rather than sitting at a fixed level. A survey taken at one state of the tide can understate what the ground does at another.
Ground conditions
What sits beneath Pimlico.
| Postcodes | SW1V |
|---|---|
| Geology | Thames river terrace gravels over London Clay, on low ground |
| Groundwater | Elevated — low-lying, close to a tidal river, on permeable ground |
| Housing stock | Cubitt stucco terraces, mansion blocks, post-war estates |
On this ground we design for water we can manage rather than water we hope to exclude — drained protection with the pump sized to a calculated inflow, twin pumps and battery backup, because on gravels a pump failure is not a slow leak.
Pimlico is one of the areas we cover across Central London.
Specification
Choosing the right system for Pimlico.
BS 8102 sets out three forms of protection. Which one suits a property in Pimlico 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 Pimlico.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.