Guidance for Service of Drained Cavity Waterproofing Systems Launched

A new code of practice relating to basement waterproofing systems has been drawn up by the Property Care Association.

The technical guide relates to drained cavity waterproofing systems – commonly known as type C waterproofing systems.

These systems allow water to flow freely through a cavity between the exterior and interior walls of a basement, before it is channelled into a sump, from where it can safely be drained or pumped away.

Guidance for the Service and Maintenance of Drained Cavity Waterproofing systems (Type C) has been drawn up by the PCA’s technical experts and highlights the need to undertake regular maintenance of these systems.

It also considers the need to design and install maintainable features and looks at the elements that should be examined and maintained.

The guide is a point of reference for PCA contractors, as well as specifiers, homeowners, and property managers who install, control or own such systems. 

Steve Hodgson, deputy director of the PCA, said: “Type C systems have developed rapidly over the last two decades and PCA contractors have access to some fantastic products.

“These include, high-density drainage membranes, advanced sealing and fixing systems, purpose designed perimeter drainage channels and state-of-the-art sump and pump packages.

“Most pumping systems now incorporate back-up pumps and batteries and an audible alarm - and it is even possible to install a system that will call people on their mobile phone if it detects a fault.
  
“However, the need to service and maintain the drainage elements of type C waterproofing systems is paramount to their long term success.

“This is already highlighted in BS8102, the Code of Practice for Protection of Structures Against Water From The Ground, and the PCA code of practice for ‘Remedial Waterproofing of Structures Below Ground’ - as well as information from the distributors of products and equipment used to create waterproof basements.

Earlier this year, a free web-based resource centre for basement conversions was developed by the PCA www.property-care.org/basementconversions

Pulling together a wealth of information online, including in-depth technical background data, case studies, a short video and images, the facility has already received thousands of visitors.

For more detailed guidance about the service of type C waterproofing systems contact the Property Care Association on 0870 121 6737 or see http://www.property-care.org/files/guidance_for_the_service_and_maintenance_of_drained_cavity_waterproofing_systems.pdf