What is the most common method of radon mitigation for single-family homes?

Active soil depressurization (ASD) is widely recognized as the most effective method for radon mitigation in single-family homes. This technique involves the use of a fan to create a negative pressure in the soil beneath the home, allowing radon gas to be drawn away from the foundation and vented to the outside. By controlling the pressure differential between the home interior and the subsoil, ASD significantly reduces the amount of radon that can enter the living space.

This method is particularly effective because it actively addresses the source of radon infiltration and maintains a continuous reduction of radon levels when properly installed and maintained. Furthermore, ASD systems can be designed to suit the specific architectural and geological conditions of the property, making them adaptable to various situations.

While passive soil venting, sealing foundation cracks, and making ventilation improvements may contribute to lowering radon levels, they often lack the efficacy and reliability that an active soil depressurization system provides. Passive methods do not actively remove radon; instead, they rely on natural airflow, which can be insufficient. Sealing cracks can help to some degree, but it is often not enough on its own to achieve acceptable radon levels. Similarly, enhancing ventilation may improve air quality but is not a comprehensive solution for