A combined waterproofing and ground gas protection system will require a combination of the recommendations from two Standards:
· BS8102:2009 Protection of structures against water from the ground. This applies to below-ground structures under risk of hydrostatic pressure and consequential ground water ingress. It recommends that a qualified waterproofing specialist should be part of the design team.
· BS8485:2015+A1:2019 Code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings. This protects against the risks from ground gases and the long term build up of VOC vapours within the substrates. To address these risks a suitable barrier is required.
When providing ground gas protection it is necessary to provide continuity beneath or within the structure and to the outside envelope of the building. This is usually up to a location above ground at conventional DPC level (150mm above external ground level).
The simplest way to achieve this will be to place a pre-applied radon barrier membrane beneath the slab, with adhesion and continuity up the edges of the slab, and then at the edges to ground level if it was all concrete
Protective measures to tackle risks of ground water ingress and the build-up of methane and carbon dioxide for new buildings should be incorporated into the system design at the start of the process using qualified waterproofing specialists.
Ground gas protection to any new building is achieved by a barrier membrane installed to provide continuity beneath or within the structure and to the outside envelope of the building, usually to a location above ground at conventional DPC level (150mm above external ground level).
We specialise in combined ground gas and structural waterproofing systems.
We hold approved contractor status with a number of leading manufacturers including Delta Membranes, Memtech Membranes and Triton Systems
For more advice or to arrange for an installation quotation please contact Carl Weatherhead CSRT CSSW
We specialise in combined ground gas and structural waterproofing systems.
We hold approved contractor status with a number of leading manufacturers including Delta Membranes, Memtech Membranes and Triton Systems
For more advice or to arrange for an installation quotation please contact Carl Weatherhead CSRT CSSW