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Waterproofing & Tanking

Certified Delta Membranes and Wykamol contractor. Cavity drain systems, tanking and sump & pump installations that keep basements permanently dry.

A dry basement is a designed basement

Waterproofing is the one part of a basement you can’t easily redo — it has to be right first time. We design and install basement waterproofing across London to BS 8102, normally combining two forms of structural waterproofing for habitable rooms below ground.

As a certified Delta Membranes contractor and certified Wykamol contractor, we install manufacturer-backed systems with the training and guarantees that come with certification.

Systems we install

  • Cavity drain membranes (Type C) — studded membranes to walls and floors that channel any water ingress to a drainage channel and sump
  • Sump and pump systems — pump chambers with battery back-up options, serviceable and monitored
  • Cementitious tanking (Type A) — multi-coat slurry tanking for cellars, vaults and retro-fit projects
  • External waterproofing and drainage — membranes, land drains and lightwell details where access allows

Retro-fit and repair

Not every project is a new basement. We handle basement tanking in London for existing cellars and vaults, fix failed tanking and take over basements where water ingress has appeared after another contractor’s work. A survey tells us where the water is coming from; the system design follows from that, not from guesswork.

See our membrane waterproofing project and Stretham waterproofing works, or book a free survey.

Planning a basement project? Let's talk about it.

A free, no-obligation site visit and quote. We'll tell you honestly what's possible under your property — and what it will cost.

Get a free quote