Black dimpled cavity drain membrane with raised nodules installed on basement concrete wall

Basement Waterproofing Guides

Basement and cellar waterproofing protects below-ground spaces from groundwater ingress. BS 8102 defines three protection types: Type A (external tanking), Type B (waterproof concrete), and Type C (internal cavity drainage). Choice depends on whether the space is new-build or retrofit, the water table level, and the intended use. These guides explain each system, costs, and Building Regulations requirements.

All Basement Waterproofing Guides

Basement Tanking Explained: Waterproofing Your Cellar

What basement tanking is, Type A/B/C systems, BS 8102 compliance, and costs for retrofit conversions.

Waterproof Membrane for Walls: Types and Installation

Cavity drain and barrier membrane types, when to use internal vs external systems, and installation methods.

Cellar Waterproofing Methods: Type A, B or C?

Detailed comparison of external tanking, waterproof concrete, and cavity drainage with pros, cons, and costs.

See also: Rising Damp Guides · Damp Proofing Guides