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.
Legislative Requirements and Membrane Verification
Developers are legally required to assess ground gas risks, implement protective measures, and undergo independent inspections and verifications to ensure compliance with gas membrane requirements.
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 Choose GRM?
We have a dedicated team of experienced inspectors who have all qualified through professional 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.
Led by Siobhan Jackson, a Chartered Environmental Scientist with over 20 years of expertise in the land contamination industry, our team ensures the highest standards of service and professionalism. GRM is also of the founding members of the British Verification Council (BVC).
Examples of recent GRM news stories related to gas membrane inspections can be found via the following links:
New Radon Gas Data has Implications for Landowners, Developers & Homeowners
Increasing Importance of Ground Gas Assessments & Membrane Verification

Accreditations





