Guides

Plain-English guides to basement waterproofing and cellar conversions. General information only, not advice for your property.

• Basement waterproofing

  Damp or water in your basement? Learn how basement waterproofing works under BS 8102 and request a free match with one independent specialist covering your area.

• Basement tanking

  What basement tanking is, when Type A barrier protection suits a cellar, how it compares with cavity drain membranes, and how to get matched with one specialist.

• Cellar conversions

  Thinking of turning your cellar into a living space? What a cellar conversion involves, regulations to check, indicative costs and a free match with one independent specialist.

• Basement conversion cost

  Indicative UK basement and cellar conversion costs per square metre from published 2026 cost guides, what drives the price, and how to get a real quote.

• Waterproofing & tanking cost

  Indicative UK costs for basement tanking, cavity drain membranes and sump pumps from published 2026 cost guides, plus what affects the price.

• Cavity drain membranes

  How Type C cavity drain membrane systems keep basements dry, when they are used, maintenance of sumps and pumps, and how they compare with tanking.

• Water in your cellar

  Why water gets into cellars and basements, what you can safely check yourself, and when to ask a waterproofing specialist.