Which areas are considered higher risk for radon exposure?

Basements are considered higher risk areas for radon exposure due to several key factors. First, radon is a naturally occurring radioactive gas that is produced from the decay of uranium found in soil and rock. Because basements are typically located below ground level, they are more likely to accumulate radon gas that seeps in from the surrounding soil.

The structural elements of basements, such as cracks in walls and foundations, as well as the presence of poorly ventilated spaces, can allow radon to enter and concentrate in higher levels compared to other areas of the home. Furthermore, basements are often less frequently ventilated compared to upper levels, which can exacerbate the accumulation of radon.

While areas with showers and flood drains, as well as washrooms, can also experience some risk for radon due to associated moisture and air exchange issues, they do not present the same level of risk as basements, where radon infiltration is often more direct and pronounced. Consequently, basements are the primary concern for radon exposure, making them the higher risk area in the context of the question.