If radon remains in a residence, it's typically in the cellar or crawl area, and also in lower degrees. " The EPA and also the doctor general suggest evaluating all houses listed below the 3rd flooring for radon," says Holtzman. Radon dangers increase in winter months when residences are typically secured up, maintaining in any kind of radon that may have entered the residence. A properly made and also constructed radon mitigation system will certainly stop radon gas and may lower soil wetness vapor from intruding into your home. A fringe benefit of a radon system might be a drier cellar space.