This guide, which supports Building Regulations Approved Document L, offers practical guidance for reducing the concentration of radon in new buildings, extensions, conversions, and refurbishment in order to reduce the risk to occupants of exposure to radon, which can cause lung cancer. It has been prepared to help architects, designers, builders, and installers specify and install successful radon protective measures. The guide contains maps of England and Wales for identifying areas where radon protective measures should be installed. This 2007 edition of the report replaces guidance published in 1999.
Contents:- Introduction, What is radon?
- Protective measures, Determining the level of protection
- Protective measures: technical approach, Basic radon protection, Full radon protection
- Detailed protective measure, Workmanship and inspection, Radon-proof barriers, Protecting suspended timber floors, Tanking to basements and cellars, High water-table, Slip or shear planes, Blinding, Reinforced slabs, Accessible thresholds, Condensation and cold bridges, Subfloor ventilation, Subfloor depressurisation and sumps, Garages, Extensions, Conversions and refurbishment, Monitoring of completed buildings and extensions
- Stepped foundations: additional points to consider
- Acknowledgements
- References and further reading, Annex: 20 maps of areas where basic or full protection should be provided
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