BS 8485 is the code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings.
It is the standard guidance for consultants designing investigations and gas protection measures for new developments, and for regulators, environmental health officers and building control who need to assess or approve foundation designs.
BS 8485 gives recommendations on ground gas site characterisation and the choice of solutions for the design of integral protective measures for new buildings, to prevent the entry of carbon dioxide and methane and provide a safe internal environment. It helps to identify the risks posed by the potential or actual presence of carbon dioxide and methane, and to confirm that they have been addressed.
For detailed information, see the NHBC guidance on hazardous ground gas.
