Another solution to utilising below ground level space is required when moisture levels determine a requirement for managed drainage – this is a Cavity Drainage System*.
Devon Damp Proofing use the SovDrain Cavity Drainage Membrane System from Sovereign Chemicals Ltd. The system utilises a range of cavity drain membranes, ancillary fixings and jointing materials, and drainage and pumping systems. The system is suitable for providing a water and water vapour barrier in both above and below ground situations such as domestic and commercial basements and cellars, flood remediation works, and in situations where installations need to continue whilst background surfaces are still damp.
This system is unlike tanking in that it is not designed to hold moisture back but instead provides a permanent cavity between the structure and a waterproof interior. Any moisture entering the cavity is collected and diverted away from the property. Drainage occurs either naturally via gravity or with a pump and sump system.
* This a TYPE C (Drained Protection) category of waterproofing as specified in the British Standard BS 8102:2009 Protection Of Structures Against Water From The Ground.