Radon Testing & Mitigation guide • Quincy, MA
The fancier the basement, the more hours people spend in it, and the closer they are to the radon source. Finished basements are the highest-priority test location in the house.
Radon enters at the foundation and is strongest at the lowest level. If that level is now a bedroom or office, testing is not optional.
Protocols say the lowest level you regularly occupy. For a finished basement, that is the basement itself, not the first floor. Testing upstairs while living downstairs misses the point.
Eight hours of sleep in basement air is the highest exposure pattern in a home. Any below-grade bedroom should have a test result on record.
Sealing walls, adding HVAC, changing airflow: finishing work alters how soil gas moves. A pre-finishing test result does not automatically describe the finished space.
Suction points hide in closets and utility areas; pipe runs go through walls and rim joists. A good installer keeps the system nearly invisible.
New bathroom, new egress, new HVAC zone: anything that changes the basement envelope is a reason to retest. It is cheap compared to the project.
If anyone sleeps or works in your basement and it has never been tested, place a test there this week. Call (857) 754-3949 and we will advise on placement for a finished space.
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