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 · CR2
Basement waterproofing in Sanderstead.
Sanderstead sits high on the Chalk, and homeowners often assume elevation means immunity from water ingress. It rarely does. Clay-with-flints capping the Chalk traps perched water that finds its way into cellars and cut-in basements, and lateral seepage through downhill-facing walls is common on the sloping plots here.
Ground conditions
What sits beneath Sanderstead.
| Postcodes | CR2 |
|---|---|
| Geology | Upper Chalk downland, elevated above the valley floor |
| Groundwater | Generally low, but perched water sits above clay-with-flints |
| Housing stock | 1930s detached and semi-detached houses, larger inter-war villas |
Our office is in Sanderstead. If you are local, we can usually look at a problem within a day or two.
Sanderstead is one of the areas we cover across Surrey & the North Downs.
Specification
Choosing the right system for Sanderstead.
BS 8102 sets out three forms of protection. Which one suits a property in Sanderstead 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 Sanderstead.
Tell us what you're seeing and we'll tell you honestly whether it needs a full waterproofing system or something much simpler.