I tend to feel the dangers of radon are exaggerated. Nonetheless, you don't want too much of it to build up in your home.n I bthink it became more of an issue when people started insulating and sealing up their homes to make them more "energy efficient". The more you seal up a home the greater the tendency to build up higher concentration of gases, such as Radon, natural gas, and other indoor pollutants. In the old days this was less of an issue. The main thing is venting. A home needs continual venting and air exchange year round. There is good reason I keep my home office window open a crack even in the coldest winter nights. It's not just because I prefer cool indoor temps. It's also for ventilation of indoor air pollutants, including possible Radon.