We have an extensive range of cavity drain membranes at Trade Building Products.
Drained protection is achieved by the incorporation of a drained cavity within the basement structure. The basement wall must provide enough primary resistance to water ingress to ensure the cavity only accepts a controlled amount of water or dampness. Water is collected in the cavity, between the external wall and an internal lining (cavity drain membrane), and diverted to a suitable drainage point.
The use of cavity drain membranes does not allow pressure to build up against the internal construction.