Is that an issue in the UK?
replyIn granite bedrock areas such as Cornwall, yes, radon is a significant concern that requires measurement and usually remediation (extraction fans).
replyThe chalk bedrock in Reading isn't generally susceptible to radon.
UK radon mapping data: https://www.ukradon.org/information/ukmaps
The map shows Reading does have some radon. Probably not at such a level most people do anything about it, but for a basement you'd definitely be better safe than sorry.
replyIt is in some areas with a lot of granite, such as Cornwall. I'm not aware it is a factor in Reading.
replyGranite tends to contain Radon as it's in the decay chain of Uranium, which is often found in Granite.
replyIt comes out of the ground. UK has some of that I think.
replyTunnels and basements just trap it so it can't blow away.
Very much so.
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