Why Spokane specifically
Radon is a colorless, odorless radioactive gas that comes up out of the ground and collects inside buildings. Two things make it worse here than in most of the country, and neither is a matter of how well your house was built.
- The geology. Eastern Washington sits on granite and on the sediment left by the Missoula Floods. Both are known uranium sources, and uranium decaying underground is where radon comes from. The EPA classifies Spokane County as Zone 1, its highest of three risk categories, meaning the predicted average indoor level is above the action level.
- The way houses here are built and lived in. Finished basements are normal in Spokane, and the basement is exactly where radon collects. Then winter closes the house for months, at the same time of year the basement gets used most.
None of that means your house has a problem. It means you cannot know without testing, and that a neighbor's result does not tell you yours. Two houses on the same street routinely test years apart.
What we do
Testing
Short term charcoal tests, long term detectors, and continuous monitors. Which one you need depends on whether you are selling a house or living in it.
How testing works →Mitigation
If your result comes back high, a sub slab depressurization system vents the gas outside before it enters the house.
How mitigation works →Reading your result
A number by itself does not tell you much. Where the test sat, how long, and whether the house was closed all change it.
Understanding levels →Buying or selling
Radon comes up constantly in Spokane real estate transactions, and the timeline is tight. There are rules about who tests and how.
Real estate testing →The mistake that costs people money
Buying a cheap hardware store kit, running it with the windows open in July, getting a low number, and concluding the house is fine. A short term test is only valid under closed house conditions: windows and exterior doors shut except for normal entry and exit, for at least twelve hours before the test starts and the whole time it runs.
Run the same test the same way in January with the house sealed against a Spokane winter and the number can be several times higher. That is not the test being wrong. That is the test finally measuring the conditions you actually live in.
How this works
- Call or fill out the form and tell us your ZIP code and whether you are testing to buy, sell, or just to know.
- We pass it to a certified radon professional serving your part of Spokane County.
- They contact you directly with pricing and availability.
No charge to you, and no obligation.