radon in slab foundations 3

https://wool-wiki.win/index.php/Understanding_Radon_Mitigation_Cost_PA_Homeowners_Should_Expect

Radon in slab foundations can be a hidden issue because the gas seeps through cracks in concrete, but a simple sub-slab depressurization system pulls it out before it gets inside. It's one of those things that sounds scarier than it is once you know the fix, yet it's worth testing for if your home sits on a slab.