A Cavity Drain system is made up of a cuspated membrane applied to the walls and floor with a channel at the wall/floor junction. The membrane allows any water ingress to filter down to the slab and find its way to the perimeter channel. The channel directs the water to a sump pump which is situated below the slab.
British Standard 8102:2022 defines Type C waterproofing as “drained protection” where water leaking through the structure is accepted into voids and air spaces, created by cavity drain membranes that are strategically placed to the inside of the structure, depressurising the incoming water and safely removing it from the property.
These membranes, coupled with the bespoke sump and pump configurations, backup systems, telemetry and ancillary options, makes it the most reliable and maintainable waterproofing solution for any habitable space below ground.
A cavity drain is a type of water management system that is used to prevent water from entering the interior of a building. It is designed to intercept and drain water that seeps through the walls or foundation of a structure.
Cavity drains consist of a series of channels or pipes that are installed in the wall or foundation of a building. These channels are filled with a porous material, such as gravel or geotextile fabric, which allows water to flow freely through the system. The water is then collected and directed to a sump pump or other drainage system, which removes it from the building.
Cavity drains are often used in conjunction with a waterproofing system, such as a membrane or coating, to provide added protection against water infiltration. They are commonly used in basements and other areas of a building that are prone to water damage, such as crawl spaces and below-grade foundations.
There are several advantages to using a cavity drain system. One of the main benefits is that it allows for the natural movement of water through the building’s walls or foundation, rather than trapping it within the structure. This helps to prevent water from building up and causing damage, such as rot or mold.
Cavity drains are also relatively easy to install and maintain. They do not require extensive excavation or structural changes, and can be easily accessed for cleaning and maintenance.
Overall, cavity drains are an effective and efficient way to manage water infiltration and protect a building from water damage. They are widely used in both residential and commercial settings, and can provide a valuable line of defense against the damaging effects of water.
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RASCOR’s engineers analyze the waterproofed scheme in terms of structural design, groundwater/gravitational water conditions, and facility size.
Full responsibility is assumed for key aspects of design, including the minimum shrinkage reinforcement, joint layout and concreting workmanship.
Our engineers provide advice on and actively supervise the incorporation of the RASCOR White Tank waterproof concrete basement system.
Quality assurance is essential to the achievement of the agreed standards of workmanship. These activities are performed continuously up to acceptance/handover and the start of the defects liability period.
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