Testing and verification of protection systems for buildings against hazardous ground gases (P3131)
Hazardous ground gases are one of the most common contamination risks on UK development sites. Methane, carbon dioxide, radon, and volatile organic compounds are present on a significant proportion of brownfield sites, and the number of buildings constructed on such land will likely continue to rise.
CIRIA C735 Good Practice on the testing and verification of protection systems for buildings against hazardous ground gases, was published in 2014 and remains the sector’s primary reference. In the 12 years since publication, the regulatory and professional landscape has changed substantially.
Project objectives
The new guide will produce updated good practice guidance on the testing and verification of ground gas protection systems, replacing C735 as the sector’s primary reference document and will focus on:
· All types of gases, including radon and VOCs
· The verification process, including scope, timing, intensity, and integrity testing
· Gas protection systems beyond membranes, including structural barriers and ventilation approaches
· Information required from installers and developers
· Various product types, structures and protection systems, including retrospective installations, complex structures such as basements, lift pits, laser screed, garages, and modular buildings, and new products such as bonded or rigid gas-resistant membranes and combined waterproofing and gas protection systems.
· Reporting standards for verification plans and validation reporting, including information needed from other stakeholders such as the installer
· Roles and responsibilities across design, installation, and verification
· Requirements from new related guidance and regulations since 2014
Project status
This project is currently seeking technical and funding support.
Further information
For further information or to get involved with this project please contact Joanne Kwan.