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Cavity Drain Waterproofing

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High quality Cavity Drain Waterproofing products

What is Cavity Drain Waterproofing?


Cavity drain waterproofing products are a category of structural waterproofing solutions designed to manage and control water ingress in below-ground structures. Unlike barrier-type waterproofing systems that aim to prevent water penetration, cavity drain systems allow water to enter the structure but provide a controlled drainage pathway to manage and redirect it away from the internal environment.

Cavity drain systems operate by allowing water to enter the structure through the external walls or floor slab. Once inside, the water is directed towards the cavity drain membranes and drainage channels by gravity or hydrostatic pressure. The water is then collected in sump chambers and pumped away from the building using submersible pumps, effectively managing and controlling water ingress.

Cavity Drain Waterproofing Benefits


Flexibility: Cavity drain systems can accommodate structural movement and settlement, making them suitable for both new construction and retrofit applications.

Reliability: Cavity drain systems provide a reliable and proven solution for managing water ingress, even in challenging soil and groundwater conditions.

Maintainability: Cavity drain systems are easy to maintain and inspect, with components accessible for servicing and repairs as needed.

Adaptability: Cavity drain systems can be combined with other waterproofing techniques and solutions to provide comprehensive protection against water ingress.

Cavity Drain Applications and Considerations


Cavity drain systems are suitable for a wide range of below-ground structures, including: Residential basements and cellars; Commercial and industrial below-ground spaces; Underground car parks and garages; and Retaining walls and substructures.

If you are considering whether a cavity drain system is the best option for your below-ground waterproofing project, there are some key points to bear in mind:

Professional Installation: Cavity drain systems should be designed and installed by qualified waterproofing specialists to ensure proper functionality and compliance with building regulations.

Compatibility: Cavity drain membranes and components should be selected based on compatibility with the substrate, soil conditions, and performance requirements of the application.

Design Considerations: Proper design of cavity drain systems, including the layout of drainage channels, sump locations, and pump capacities, is critical to ensuring effective water management and drainage.

Overall, cavity drain products offer an effective and versatile solution for managing water ingress in below-ground structures, providing reliable protection against flooding, dampness, and water damage.

Contact BaseTec - Complete Systems. Reliably Delivered.


If you require assistance with Type C waterproofing or need advice on whether a cavity drain system is suitable for your requirements, contact our friendly teams in Kent - 01732 906 826 - or Leeds - 0113 521 6789.

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Frequently Asked Questions About Cavity Drain Waterproofing

What is cavity drain waterproofing, and how does it work?

Cavity drain waterproofing is a system that manages water ingress in below-ground structures by allowing water to enter the building and then controlling its flow using a network of drainage channels, membranes, and pumps. The system creates a controlled drainage pathway to redirect water away from the internal environment, preventing flooding and water damage.

How does cavity drain waterproofing differ from traditional waterproofing methods?

Unlike traditional barrier-type waterproofing methods, which aim to prevent water penetration, cavity drain waterproofing systems allow water to enter the structure, then managing and redirecting it. This approach is particularly effective in situations where high water pressure or hydrostatic forces are present.

Where can cavity drain waterproofing be used?

Cavity drain waterproofing systems are suitable for a wide range of below-ground structures, including residential basements, cellars, commercial and industrial buildings, underground car parks, and retaining walls. They can be installed in both new construction and retrofit applications.

What are the main components of a cavity drain waterproofing system?

The main components of a cavity drain waterproofing system include cavity drain membranes, drainage channels, sump chambers, and submersible pumps.

Are cavity drain waterproofing systems reliable?

Yes, cavity drain waterproofing systems are considered reliable and effective solutions for managing water ingress in below-ground structures. They have been used successfully for many years and are backed by industry standards and best practices.

Do cavity drain waterproofing systems require maintenance?

Yes, cavity drain waterproofing systems require regular maintenance to ensure proper functioning and effectiveness. Maintenance tasks may include inspecting and cleaning drainage channels, checking pump operation, testing float switches, and monitoring for any signs of damage or deterioration.

Can cavity drain waterproofing systems be installed in existing buildings?

Yes, cavity drain waterproofing systems can be installed in existing buildings through retrofit applications. However, the feasibility of installation may depend on factors such as access, structural conditions, and the extent of existing waterproofing systems.

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