When is it recommended to retest a building for radon exposure?

It is recommended to retest a building for radon exposure in conjunction with any sale of the building. This practice ensures that the new occupants are aware of the radon levels in the home, as radon is a colorless, odorless gas that can pose significant health risks over time, including lung cancer. When a property is being sold, it is crucial to provide potential buyers with accurate and up-to-date information about the indoor air quality, including radon levels. Testing during a sale can also help facilitate negotiations or required mitigation measures if high radon concentrations are detected.

Testing every month or annually during the heating season may not be practical or necessary for all homes, as radon levels can fluctuate based on various environmental factors and building usage. Waiting until noticeable health issues arise is not advisable, as radon exposure is a silent danger that can lead to serious health consequences without apparent symptoms. Therefore, performing a radon test during the sale process is a proactive approach to ensuring safety and compliance.