Iowa Radon Inspection Service

HOW DOES RADON GET INTO A HOME?
Warm air rises, creating a small vacuum in the lower areas of a house. Radon moves through and into the home as air moves from a higher pressure in the soil to a lower pressure in the home. Radon gas seeps into a house the same way air and other soil gases enter: from the soil around and under the home and through cracks in the foundation, floor or walls; hollow-block walls; and openings around floor drains, pipes and sump pumps; and through crawl spaces.