Radon
Definition and meaning of Radon in real estate.
Radon is a naturally occurring, odorless, and colorless radioactive gas produced by the decay of uranium in soil and rock. It can seep into homes through foundation cracks and plumbing entry points, posing a significant lung cancer risk.
In more detail
Because radon is invisible and scentless, the only way to detect it is through specialized testing. In the United States, radon testing is a standard part of the home inspection process during a real estate transaction. If test results show high radon levels, typically defined by the Environmental Protection Agency as four picocuries per liter or higher, buyers often request that the seller install a mitigation system.
A typical active soil depressurization system uses a vent pipe and fan to draw radon from beneath the house and vent it safely outside.
Key facts
| Category | Buying & Selling |
|---|---|
| Action Level | Four picocuries per liter (4 pCi/L) or higher |
| Health Risk | Leading cause of lung cancer among non-smokers |
| Common Fix | Sub-slab depressurization mitigation system |
During a home purchase, the buyer requests a radon test, which reveals elevated levels of the gas. The seller agrees to pay for a radon mitigation system to reduce the gas before closing.
Frequently asked questions
How does radon get into a house?
Radon gas moves up through the soil and enters a home through cracks in concrete floors, foundation walls, floor drains, and sump pump openings.
Can you fix a house with high radon levels?
Yes, professional radon mitigation systems can be installed, usually costing between one thousand and three thousand dollars, to vent the gas safely out of the home.