What are two potential entry points for Radon in homes?

Radon is a colorless, odorless gas that can pose significant health risks when allowed to accumulate in homes. It originates naturally from the decay of uranium found in soil and rocks, and it typically enters homes through specific points where the building's structure is in contact with the ground.

Basements and crawl spaces are particularly susceptible to radon entry because they are often located below ground level, where radon concentrations can be higher. The gas can seep into these areas through cracks in the foundation, gaps in walls, or openings around service pipes. Since basements and crawl spaces are often less ventilated than other parts of a home, radon can accumulate there, leading to elevated levels that may pose health risks to inhabitants.

The other options involve areas that are either elevated, such as attics and roofs, or less likely to facilitate radon entry. Living rooms and dining areas, while essential parts of the home, are typically not where radon enters but can be affected by elevated radon levels originating from lower areas. Thus, addressing radon concerns primarily involves focusing on the areas with the highest potential for gas ingress, namely basements and crawl spaces.