If levels are still high, consider setting up a radon reduction system yourself or hire a pro. Although it can permeate straight with pores in concrete, the worst entry points are voids in wall surfaces and floorings (see picture over). An…

Do I need a radon test if I have a crawl space? If the level falls between 2.0 and 4.0 pCi/L, a mitigation system is beneficial and is strongly encouraged if there will be current or ex-smokers in the home. A level of 4.0 pCi/L and higher …