Structural Waterproofing

Structural waterproofing is the process of preventing water from entering a building through its structure. It is commonly used in basements, cellars, retaining walls, and below-ground spaces to keep properties dry and protected from water ingress.

Unlike basic damp proofing, which helps stop moisture rising through walls, structural waterproofing is designed to resist water pressure from the surrounding ground. It creates a waterproof barrier that prevents leaks, flooding, mould growth, and long-term structural damage.

There are three main types of structural waterproofing:

• Type A (Barrier Protection): Waterproof membranes or coatings applied to walls and floors to stop water entering.
• Type B (Integral Protection): Waterproof concrete used during construction to make the structure itself water-resistant.
• Type C (Drained Protection): Cavity drain membrane systems that collect water and direct it safely to a sump pump and drainage system.

Structural waterproofing is commonly used for:

• Basement conversions
• Cellar waterproofing
• New-build basements
• Underground structures
• Retaining walls
• Buildings with recurring water ingress

When installed correctly, a structural waterproofing system protects your property from water damage, creates a dry and usable living space, helps prevent mould and damp, and can add value to your home.

Because every property is different, the most suitable waterproofing system depends on the building’s construction, the level of groundwater, and how the space will be used. A professional survey is essential to determine the right solution.