Delta Membrane Systems Limited offer a comprehensive range of ground gas protection solutions along with its structural waterproofing solutions.

Greater emphasis on appropriate gas protection measures have been brought about by the issue of BS 8485: 2015 – Code of Practice for the Design of Protective Measures for Methane and Carbon Dioxide Gases for New Buildings. All ground gas (Methane, Carbon Dioxide, Radon, VOC’s, along with others) protection systems should be designed in accordance with the most up to date Guidance and Regulations. Attention is drawn to CIRIA C665, C716, C735, C748 and BS 8485:2015. In addition there are specific requirements for building warranty providers such as NHBC.

Ground gas protection is offered for the following gases:

  • Radon
  • Methane
  • Carbon Dioxide and other Ground/Landfill Gases
  • Volatile Organic Compounds (VOCs) including Benzene, Toluene, Chlorinated Solvents and Ethers.

The code of Practice provides a solution choice flow chart and appropriate gas protection measures should be selected using this method based on the CS of each site.

Once CS level for the site has been assessed, the building should be categorised by building type, by combining the CS level with the building type a gas protection score can be determined. Once this is determined then using the following 3 elements a gas protection system can be appropriately designed:

  • Structural barrier (the building)
  • Ventilation measures
  • Gas resistant membrane

The design requires 3rd party verification along with installation monitoring in accordance with CIRIA C735.

Installation should be carried out by trained operatives.

Always ensure your gas protection products offer a safe solution for the protection of buildings, adhere to the appropriate standards and Building Regulations.