GRM provide a range of ground gas related services for landowners and developers including initial ground gas risk assessments, independent inspections of gas membrane installations, membrane testing, verification and validation in line with the latest regulations.
Why is Verification Required?
Where risks from ground gases such as radon, methane or carbon dioxide have been identified, independent gas membrane verification is necessary to ensure and demonstrate that the ground gas protection measures have been adequately installed.
Even when a qualified installer is used, the various regulatory bodies and current guidance (BS8485:2015+A1:2019) require that these membrane installations are also validated by a third party. GRM offer ground gas membrane protection validation in line with CIRIA C735 (Good practice on gas membrane testing and verification of protection systems for buildings against hazardous ground gases – guidance on expected frequency for verification).
Our ground gas protection verification service is 100% independent of the membrane manufacturer, installer and client.

Why work with GRM?
GRM is one of the founding members of the British Verification Council (BVC) and has been undertaking gas membrane validations for over 15 years.
We have a dedicated team of experienced inspectors who have all attended external training courses including the CL:AIRE Verification of Gas Protection Systems, in addition to practical on-site training. Our GRM team work across the UK on both residential and commercial developments and can often attend at short notice.
The team is led by Siobhan Jackson, a Chartered Environmental Scientist with over 20 years’ experience in the land contamination industry.
If not already available, we can also provide a Gas Protection Measures Design and Verification Plan and undertake regulator liaison on your behalf to agree the scope of any gas protection measures and the subsequent validation programme.

Accreditations





