Basement Waterproofing in NW London

Select Your Area

We provide basement waterproofing across NW London's premier neighbourhoods. Each area has specific planning rules and property characteristics — select yours for tailored information.

How It Works

1. 1

   Damp Investigation and Groundwater Assessment

   We inspect the existing basement to identify the nature and source of water ingress — rising damp through the slab, lateral pressure through walls, or surface water penetration. We assess the groundwater table level (referencing the site's proximity to the Heath aquifer, Regent's Canal, or local drainage features) to specify an appropriate waterproofing grade.

2. 2

   Waterproofing Specification and Structural Survey

   A waterproofing specialist produces a specification in accordance with BS 8102:2022 and NHBC standards. The specification identifies whether Type A (tanking), Type B (structural concrete), Type C (drained cavity), or a combination is appropriate. Structural integrity of the existing walls and slab is confirmed before specification is finalised.

3. 3

   Surface Preparation

   The existing basement walls and floor are stripped back to the substrate. Hollow renders, painted surfaces, and contaminated materials are removed. Concrete defects and honeycombing are identified and repaired using hydraulic cement or polyurethane injection. The substrate must be sound and clean for any waterproofing system to perform.

Select an area above to see the complete 7-step process with area-specific planning guidance.