BS 8485:2015+A1:2019 – Codes of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings.
- Ground gases typically found near landfill sites, but can occur from other sources
- Encourages the use of qualified installers
- Validation to Ciria C735 is a requirement
- Additional influences on the system should be considered, such as the hydrostatic conditions, and the likelihood of the source contaminant being in direct contact with the protective measures proposed
![GP<sup>®</sup> TITANTECH DPC](https://juta.co.uk/wp-content/uploads/2020/08/methane-1.png)
BRE 211:2015 – Guidance on protective measures for new buildings. (RADON)
- Naturally occurring ground gas. Larger concentrations in the South-West of UK
- Minimum recommendation is a membrane of 300 micrometre (1200 gauge) polyethylene sheet or equivalent
- It must be installed with considerable care and protected once installed
Taped laps are required
![GP<sup>®</sup> TITANTECH DPC](https://juta.co.uk/wp-content/uploads/2020/08/Radon-1.png)
CIRIA C748:2014 – Guidance on the use of plastic membranes as VOC vapour barriers
CIRIA C682:2009 – VOC Handbook
- Risk based approach
- No quantifiable limits on material performance
- Testing to ISO 15105-2 and EN 14414/EN 14415
- 9 main VOC types are tested for
- Welded laps are required as most tapes are made from bitumen/butyl and are affected by VOCs
![GP<sup>®</sup> TITANTECH DPC](https://juta.co.uk/wp-content/uploads/2020/08/hydrocarbons-2.png)
CIRIA C735:2014 – Good practice on testing and verification of protection systems to buildings from hazardous gases
- Good practice on testing and verification of protection systems to buildings from hazardous gases
- Check design and detailing is in accordance with site requirements
- Checks the competency of the installer (NVQ LEVEL 2 minimum)
- Test integrity of the membrane/barrier system
- Visual inspection
- Written report on inspection/testing and sign-off
BS8102:2009 – Code of practice for protection of below ground structures against water from the ground
![GP<sup>®</sup> TITANTECH DPC](https://juta.co.uk/wp-content/uploads/2020/08/General-1.png)