Structural Waterproofing Services

Structural waterproofing is a critical element in the design and construction of below-ground structures. It's a system of measures designed in accordance with BS:8102 (Protection of Below Ground Structures Against Water Ingress) to prevent water ingress through the structure itself, maintaining a dry and usable space. Unlike damp proofing, which deals with moisture rising through walls or floors generally above ground level, structural waterproofing addresses water penetration to below ground structures via hydrostatic pressure and lateral damp penetration.

There are three primary types of structural waterproofing systems, each with its own benefits and applications. Where conditions dictate according to BS8102, two or more systems can be combined to achieve the desired grade of waterproofing.

These systems comprise of:

Type A waterproofing is when a material is put in place to provide a barrier to water ingress. The main aim of a Type A waterproofing system is to lock down structures to keep the space it is applied to dry.

The waterproofing system most associated with Type A waterproofing are post-applied membranes usually cementitious for internal application and either bitumen or rubber externally.

Typical spaces that would use Type A Waterproofing include:

• New build basements
• Basement renovations
• Cellar refurbishments
• Storage or utility rooms
• Underground car parks
• Earth retaining walls
• Swimming pools

Type B - Structurally Integral Protection: This system relies on the structure itself to resist water penetration. This can be achieved through the use of waterproof concrete, incorporating watertight construction techniques, or by adding admixtures to the concrete mix.

Type C waterproofing refers to waterproofing systems that manage water ingress. Type C systems will use a combination of wall and floor membranes, basement floor drainage and a sump pump system incorporating dual pumps, an alarm and battery backup system to provide power in the event of a power failure.

Type C waterproofing is defined by the British Standard (BS) Code of Practice BS8102:2022.

Type C waterproofing systems are often regarded as the fail safe of the industry. They can be used in new build and retrofit solutions. They would usually be applied to spaces that have no waterproofing systems in place or have a failed Type A or Type B systems. Examples include:

• Basement conversions
• Cellar conversions
• Car parks
• Utility rooms
• Garages
• Earth retaining walls

Peter Cox offers a comprehensive range of structural waterproofing services in accordance with BS:8102, including:

• Basement Waterproofing
• Cellar Waterproofing
• Waterproofing for New Builds
• Remedial Waterproofing for Existing Structures
• Tanking
• Structural Repairs

It's crucial to identify the signs of water ingress early on to prevent further damage to your property.

Common signs you need waterproofing in your below ground space:

• Damp patches on walls or floors
• Efflorescence (white salt deposits)
• Mould growth
• Water stains or tide marks
• Peeling paint or plaster
• Musty odours

If you notice any of these signs, contact Peter Cox for a professional assessment. Our CSSW qualified experts will identify the source of the problem and recommend the most effective waterproofing solution, all presented in a thorough and detailed report.