Structural Waterproofing in London
Comprehensive Protection for Below-Ground and Vulnerable Structures
Structural waterproofing is essential for protecting buildings from water ingress, especially in areas below ground such as basements, cellars, retaining walls, and lift pits. Whether you're working on a new build or refurbishing an existing structure, waterproofing is critical to ensure long-term stability and usability.
At City Waterproofing Ltd., we are specialists in structural waterproofing solutions, delivering tailored, BS 8102:2022-compliant systems that safeguard your property from moisture, damp, and hydrostatic pressure.
What Is Structural Waterproofing?
Structural waterproofing refers to the techniques and systems used to protect parts of a structure that are either below ground level or exposed to water ingress. It prevents moisture penetration through floors, walls, joints, and foundations — protecting both the fabric of the building and its internal finishes.
Typical applications include:
- Basements and cellars
- Retaining walls
- Underground car parks
- Lift pits and plant rooms
- Tunnels and podium decks
- Concrete foundations
Why Is It Important?
Water ingress can lead to:
- Damp walls and floors
- Mould growth and poor indoor air quality
- Structural damage due to corrosion or freeze-thaw cycles
- Failure of interior finishes
- Devaluation of the property
A professionally installed waterproofing system prevents these issues — protecting both structural integrity and the internal environment of your building.
Compliant with BS 8102:2022 Standards
All structural waterproofing work carried out by City Waterproofing Ltd. complies with BS 8102:2022, the British Standard Code of Practice for the protection of below-ground structures against water from the ground.
The code classifies waterproofing systems into three types:
- Type A (Barrier Systems) – Blocks water with a physical barrier applied to walls and floors.
- Type B (Structurally Integral Systems) – Relies on concrete structures designed to be inherently water-resistant.
- Type C (Drained Cavity Systems) – Uses membranes and drainage systems to manage water that penetrates the structure.
We often combine methods to ensure maximum protection and tailor the system to the building's needs, location, and intended use.
Our Structural Waterproofing Process
1. Site Survey & Risk Assessment
We assess your site conditions, structure type, groundwater levels, and intended use of the space. This informs the design of the most effective system.
2. Design & Specification
We develop a bespoke waterproofing plan that aligns with BS 8102 guidelines, including contingency planning for future maintenance and drainage access.
3. Installation by Qualified Technicians
Our experienced team installs high-performance systems using market-leading materials, such as:
- Cementitious tanking products
- Cavity drainage membranes
- Sump & pump units
- Waterproof concrete additives
- Joint sealants and water bars
4. Aftercare & Guarantees
We offer clear warranties and ongoing advice to ensure long-term performance and peace of mind.
Why Choose City Waterproofing Ltd.?
- Decades of experience in below-ground waterproofing
- Trained and qualified in BS 8102:2022 systems
- Trusted by architects, developers, and homeowners across London
- Guaranteed work with certified materials
- Responsive, professional, and competitively priced
Get Expert Structural Waterproofing Advice
Whether you're protecting a new build or refurbishing an older property, City Waterproofing Ltd. offers reliable, long-lasting waterproofing solutions designed for structural resilience.
Contact us today to book a no-obligation site inspection and get expert recommendations for your project.