When to Test for Radon, Asbestos, and Lead
By Daniel SmokeDirector of Operations
Knowing when to test for environmental hazards is as important as knowing what to test for. Each hazard has specific trigger events, circumstances where testing is required, recommended, or time-sensitive. This guide explains the key moments when radon, asbestos, and lead testing should be on your list.
When to Test for Radon
Radon testing is recommended for any home that has never been tested, when buying or selling a home, and when finishing a basement or converting below-grade space. It is also recommended after any significant change to the foundation or HVAC system, and periodically about every two years, especially for homes in high-radon areas. The EPA recommends testing if you have not tested in the past two years.
When to Test for Asbestos
Asbestos testing is required before renovation or demolition that would disturb materials in older buildings. It is also recommended before purchasing a pre-1978 property, when materials show signs of deterioration, and when an inspector or contractor identifies suspect materials. You cannot delay testing until mid-project. It must happen before work begins.
When to Test for Lead
Lead paint testing is recommended when purchasing or selling a pre-1978 home, before renovation in a pre-1978 home, and when paint is deteriorating in a home with children under six. It is also recommended for landlords of pre-1978 rental properties. Federal law requires EPA RRP certified contractors for renovation work in pre-1978 homes, and testing is part of that compliance pathway.
Testing Multiple Hazards at Once
Many situations call for testing more than one hazard at the same time. A home purchase inspection, a pre-renovation survey, and a rental property compliance review may all require radon, asbestos, and lead testing simultaneously. Peerless Environmental can arrange testing for all three hazards in a single engagement.
Common Questions
Can all three hazards be tested in one visit?
Usually, yes. A single engagement can cover asbestos sampling, a lead assessment, and placement of a radon device. This is common for home purchases, pre-renovation surveys, and rental compliance reviews. Coordinating them together saves scheduling and often site visits.
How often should I re-test?
It depends on the hazard. Asbestos and lead are materials in the building. Once documented, they don't need routine re-testing unless conditions change or you're about to disturb them. Radon is different: the EPA recommends re-testing every two years, and after any major foundation or HVAC change, because levels drift over time.
Do newer homes need any of this?
Asbestos and lead are pre-1978/pre-1980 concerns, so a newer home rarely needs them. Radon is the exception. It's a soil gas unrelated to a building's age, so even new construction can test elevated. That is why radon testing is recommended for homes of any age.
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