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How much radon penetrates through concrete?

Dear Radsafers,

Has anyone measured the penetration of radon gas through a concrete slab?

How much radon gets into a typical house through the concrete in the

basement or slab? 

EPA publications write only about the radon pathway through openings or

cracks. They, however, explain that their sealing or caulking is not

effective. Soil gas and radon also penetrate through the pores in concrete.

And radon dissolved in water is carried indoors by moisture migration. I

wonder if there are some scientific data.

Your expert feedback and data will be greatly appreciated.


Dan Richards



203 225-0366