Board Thread:General Discussion/@comment-40226390-20200106105350/@comment-44123106-20200121181722

Houses in certain parts of the UK - Cornwall and parts of Bedfordshire/Northamptonshire for example - have to be designed so that they do not trap the radon gas that emenates from the ground. It is radioactive; a holiday in Cornwall gives quite a high dose - not life threatening, but noticeable. I used to know the figures, but I've forgotten.