radon in slab foundations 4

https://wiki-global.win/index.php/Why_You_Need_a_Certified_Radon_Specialist_for_Home_Testing_and_Mitigation

Radon in slab foundations is a serious concern because this radioactive gas seeps through cracks in concrete, often unnoticed until levels are high. Homes built on slabs are especially vulnerable, as soil gases can enter directly through floors. Testing is the only way to know if there's a risk, and mitigation usually involves sealing gaps and improving ventilation. It's not about panic, but about being aware and taking simple steps to keep your indoor air safe.