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Slab depressurization (essentially creating a partial vacuum under a building's concrete slab floor) can work very well. These days usable radon concentration meters are quite affordable. I used one in a building I own to verify the effectiveness of a slab depressurization system. It reduced measured radiation levels to a small fraction of the baseline. Of course you need a building with a slab foundation to use this technique.



Yeah it’s an amazingly simple approach. I did it in a house i renovated, the building inspected tried to stop me as he wasn’t familiar with the system and thought it would actually allow radon in. Turns out he had a family member die from lung cancer and they believed they was a possible link. I expect at some point it’ll be part of most modern building codes where there is a basement connecting to a living space.




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