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 · SW3, SW10
Basement waterproofing in Chelsea.
Chelsea combines demanding ground conditions with the tightest planning regime in the country for subterranean work. Kensington and Chelsea restricts basements to a single storey and limits the proportion of a garden that may be excavated, so the value is in executing a permitted scheme to an exceptional standard rather than digging deeper.
Ground conditions
What sits beneath Chelsea.
| Postcodes | SW3, SW10 |
|---|---|
| Geology | Thames terrace gravel over London Clay |
| Groundwater | High, with tidal influence close to the Embankment |
| Housing stock | Georgian and Victorian town houses, garden squares, mansion blocks |
RBKC subterranean development policy is strict and rigorously enforced. We will tell you what is realistically consentable before you spend money on a design that will not get through.
Chelsea is one of the areas we cover across Central London.
Specification
Choosing the right system for Chelsea.
BS 8102 sets out three forms of protection. Which one suits a property in Chelsea 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 Chelsea.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.