radon retest 13

https://getradontestingjeffersoninfo.clearhavendigest.com/posts/when-to-schedule-radon-testing-jefferson-county-mo-homes

If your initial radon test came back high, a radon retest is crucial to confirm the levels before taking mitigation steps. The timing matters: wait at least three months after the first test or after any major home renovations. Use a test placed in the same lowest lived-in area, ideally during winter when the home is closed up. This second measurement gives you a more reliable average, helping you decide if you need to hire a radon mitigator to reduce your family's long-term exposure.