Should the openings around penetrations of foundation walls be sealed with an elastomeric sealant?

Sealing the openings around penetrations of foundation walls with an elastomeric sealant is indeed a best practice in radon measurement and mitigation. This approach helps prevent radon gas from entering the living spaces of a building through cracks and gaps where piping or other utilities pass through foundation walls. An elastomeric sealant is particularly suitable because it is flexible, allowing it to accommodate any movement or settling of the building without cracking or losing adhesion.

By ensuring these openings are properly sealed, it significantly reduces the potential for radon entry and enhances the overall integrity of the building’s envelope. This not only protects occupants from radon exposure but also contributes to improved indoor air quality. Therefore, sealing penetrations with elastomeric sealant is an important step in effective radon control strategies.