This report investigates the performance of preventive measures in reducing radon levels in new homes built in areas of elevated radon risk by comparing radon levels in new properties built with basic radon prevention measures with levels observed in properties, in the same areas, that were built without preventive measures, prior to this Building Regulations requirement.
The results show that ‘basic’ preventive measures reduce radon levels in new properties by around 40% when compared with properties built without these measures in areas of elevated radon risk.
Radon levels in some properties were high despite having these basic measures in place. This supports existing Public Health England advice that these properties should be tested for radon.
This evidence will be useful to those involved in designing and reviewing radon prevention measures in new properties.