What process is used primarily to prevent radon entry in homes?

The process that is primarily used to prevent radon entry in homes is active soil depressurization. This method involves the installation of a radon mitigation system that creates a negative pressure beneath the foundation of the home. By doing so, it effectively draws the radon gas from the soil before it can enter the living area.

Active soil depressurization utilizes fans and vent pipes to continuously expel the radon gas outdoors, thereby reducing the concentration of radon inside the home to safer levels. This approach is particularly effective because radon is a naturally occurring gas that can enter through cracks in floors, walls, and gaps around service pipes, making it crucial to actively manage its entry.

While other methods such as air sealing, passive solar design, and foundation waterproofing may contribute to a reduction in radon levels or enhance home energy efficiency, they do not specifically target the prevention of radon entry as effectively as active soil depressurization. Air sealing can reduce the movement of radon-laden air into the home, but it is not as reliable or effective on its own as a dedicated radon mitigation system.