The independent self-regulatory body for the radon protection industry

Coopers (Chester) Ltd

Gas Membrane Verification

Coopers Engineering Consultants carry out independent inspection and verification of installed ground gas mitigation measures, inclusive of the sub-floor ventilation and ground gas membranes. Following the inspection of the ground gas membrane, verification reports are produced for issue to our clients and the warranty provider (NHBC, LABC, Premier) for the discharging of planning/land quality conditions.

Coopers’ ground gas design and verification works are carried out in accordance with BS 8485:2015+A1:2019 – Code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings and the CIRIA 735 – Good practice on the testing and verification of protection systems for buildings against hazardous ground gases.

We carry out verification plans in accordance with CIRIA 735 to ensure that the ground gas mitigation measures installed are suitable for the regime (Characteristic Situation/NHBC classification) and that the membrane/ancillary products are selected and will survive the construction process. These are produced to ensure that the installation contractor is aware of their requirements and to satisfy the local authority/guarantor that sufficient verification will be undertaken and provided on behalf of the developer.

Our verification works are carried out predominantly on residential housing developments (Type A buildings) but can also inspect commercial and industrial units when requested (Type B-D).

Following the release of the BS 8485:2015+A1:2019 publication and dependant on the project specific criteria, independent inspection and verification is regularly a mandatory requirement to ensure minimal risk to life. We regularly inspect membrane systems designed to protect against the ingress of carbon dioxide, methane, VOC’s and radon. Coopers are one of the first 10 No. companies in the U.K. approved to be a member of the British Verification Council, an association of industry professionals/organisations looking to create a benchmark for high standards of gas membrane verification and to train junior engineers/installers and verifiers.

Coopers were involved in the production of the CIEH ‘Local Authority Guide to Ground Gas’. Coopers examples of verification reports are referenced and appended within the CIEH document and also within the information pack provided by Liverpool City Council’s guide to consultants. Our validation reports include a description of the inspection regime, the specifics of the protection system, robust photographic records of the ground gas mitigation measures witnessed showing any defects/repairs, reference any integrity testing undertaken and a detailed inspection record sheet for each inspected plot to satisfy statutory bodies.

Area of operation: Nationwide

Course booking Terms and Conditions

  1. All course fees are payable in full at time of reservation unless agreed otherwise.
  2. A refund of 60% of the amount paid will be made in the event of receipt of written cancellation at least FOUR weeks prior to the date of the course. No refund can be made on cancellation thereafter.
  3. If a candidate cannot attend the course on the agreed date, the candidate may be able to attend the next identical course. If they miss this next identical course, they cannot attend another without the payment of course fees. 
  4. Substitution of delegates (from the same company/firm) can be made at any time prior to the start of the course.
  5. In the event that a course is oversubscribed, The Radon Council reserves the right to place candidates on the course as the course fee is paid. When the course is full, the remaining candidates will be moved to the next suitable course. 
  6. All course documentation is provided solely for the private training and study purposes of individual delegates. Copyright is reserved on all material prepared and provided by The Radon Council.
  7. The Radon Council reserves the right to make any alterations to course arrangements necessitated by circumstances beyond its control.