Radon gas
is a natural occuring gas that is present in rocks and soils
It is carcinogenic and increases the chance of getting cancer, some 300 deaths a year are attributed to high levels of radon in peoples homes

It is important when undergoing any significant improvements to introduce some radon mitigating measures in order to reduce radon in the event in the future you find your house has high levels present.
                   
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Radon is a naturally occurring radioactive gas that

originates from the decay of uranium in rocks and soils. 

See if your in a high radon area
Radon Risk Map of Ireland

Radon is colourless, odourless and tasteless and can only be measured using specialist equipment. When radon surfaces in the open air, it is quickly diluted to harmless concentrations. However when
it enters an enclosed space, such as a house or building, it can sometimes accumulate to unacceptably high concentrations. 
 
Radon decays to form tiny radioactive particles, some of which remain suspended in the air. When inhaled into the lungs these particles give a radiation dose that may damage cells and eventually lead to lung cancer.
 
Since July 1998, revised building regulations see all new dwellings and buildings required to incorporate some degree of radon preventative measures at the time of construction.
The degree of protection required is dependent upon whether the site is located within a high or low radon area.
 
Installing a radon membrane in a new build is a very straight forward process once the correct protection has been identified. However in a retrofit situation radon barriers will have little effect and other measures
should be taken to have an effective defense against a radon problem. These would be part of the standard specifications for floors in work done by OldBuilders Company.

It would be normal practice, indeed a code requirement to put in some kind of radon mitigating measure on any major refit, that would apply also to the other part of your building
if you have not yet put in the solid floor.   Certainly we have not done a floor in 20 years without a radon sump.   Its very expensive to retrofit this radon stuff after you have a
radon problem, so best to do it while your at the other work.
 
You can also find out more information about radon from the Environmental Protection Agency

Topically in the papers
Proposal for homeowners to be required to test for radon when selling property
https://www.irishtimes.com/ireland/housing-planning/2022/05/26/proposal-for-homeowners-to-be-required-to-test-for-radon-when-selling-property/

https://www.irishtimes.com/ireland/2022/05/25/more-than-170000-homes-at-risk-from-radon-gas-epa-maps-show/



                       
     

         
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