CDI Waterproofing Services
Waterproofing Guidelines

Structural Waterproofing British Standard BS8102

Currently in the UK, the baseline for all waterproofing is the British Standard BS8102-2022 / Protection of below ground structure against water ingress. The code of practice identifies risk assessment methodologies, recognised waterproofing, water management barrier types and provides guidelines and recommendations based on best practices.

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1. Type A Barrier Protection

Applied externally to slabs & Walls, resistant to positive hydrostatic pressure, Applied internally, resistant to negative hydrostatic pressures. These barrier types externally are typically sheet & liquid applied membranes where appropriate, cement based products can also be applied externally & internally providing resistance to both positive & negative hydrostatic pressures.

2. Type B (structurally Integral) Protection

Type B barrier protection comes from the structure itself, typically constructed of reinforced concrete and designed in accordance with current BS EN 1992/1993

3. Type C (Drained) Protection

Type C Waterproofing protection manages water that penetrates the structure, managing any ingress to a suitable discharge point. External elements of the structure should be capable of controlling the rates of water ingress so not to exceed the capabilities of the cavity drain system.

4. Combined Protection

A combination of Type A, B & C barrier in any configuration being either two or three lines of protection is a consideration where the assessed risks to a project, and the consequences of failure deemed are too high.