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 · SW1X, SW7
Basement waterproofing in Knightsbridge.
The river Westbourne still runs beneath Knightsbridge in a culvert, carried in an iron pipe above the platforms at Sloane Square station where you can see it from the train. Properties sitting on or near that alignment behave nothing like the street behind them, and a specification written from a neighbour's experience rather than from a survey of your own ground is a genuine risk here.
Ground conditions
What sits beneath Knightsbridge.
| Postcodes | SW1X, SW7 |
|---|---|
| Geology | London Clay with river terrace gravels |
| Groundwater | High risk along one line — the culverted Westbourne runs straight through the area |
| Housing stock | Stucco terraces, large mansion blocks, substantial townhouses |
We establish where a property sits relative to the Westbourne culvert before proposing anything. On the alignment it is drained protection with a properly sized pump; a few streets off it, a barrier system may be entirely adequate.
Knightsbridge is one of the areas we cover across Central London.
Specification
Choosing the right system for Knightsbridge.
BS 8102 sets out three forms of protection. Which one suits a property in Knightsbridge 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.
Request a quote
Book a survey in Knightsbridge.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.