Radon typically enters a home by rising up from the soil and seeping into the cracks and crevices of a home’s foundation. Any type of home, regardless of whether it has a basement, crawl space or sits on a concrete slab, is susceptible to radon. The house acts like a vacuum, pulling the inert gas upward from the soil. Therefore, the lower levels of a home tend to have higher concentrations of radon than a second or third story.
All homes, both new and old, have the potential of being inflicted with radon problems. Some of the most common entry points for radon include:
- Foundation cracks
- Construction joints
- Gaps found in suspended flooring
- Unsealed spaces around service pipes
- Wall cracks
- Cavity holes inside of walls
- Water supply sources
The Environmental Protection Agency estimates 1 in 15 homes in the United States are affected by high levels of radon. However, without proper testing many of these cases go undetected until the health problems become so severe they cannot be reversed. Homes that depend on wells for their water supply or septic systems for their plumbing are at a heightened risk of radon exposure.