If your long-term result is above 200 Bq/m³, it's over Health Canada (opens in a new tab)'s guideline. Health Canada (opens in a new tab) says to fix it within a year, and sooner the higher it is. If it was a short test, confirm it with a long one first.
Health Canada (opens in a new tab) says the risk from radon is long-term, not immediate, so you've got time to plan a fix. The most common fix is a radon system, and we can tell you what that would look like for yours. We'll quote a fix from a kit or library result, with no retest needed for the quote. If it was a short test, Health Canada (opens in a new tab) still says to base the decision on a long-term one.
200 Bq/m³
Health Canada (opens in a new tab)'s guideline. Above it, fix it.
Within a year
How soon Health Canada says to fix it, sooner if it's higher
From $3,000
A typical radon system from us, plus HST
11%
of Windsor-Essex homes tested were above 200 Bq/m³, 2015 to 2018
Health Canada's guideline is 200 Bq/m³. If your yearly average is above it, Health Canada says to fix it.
Check the units first. Some kits and monitors show pCi/L instead of Bq/m³. 1 pCi/L is 37 Bq/m³, so 200 Bq/m³ is about 5.4 pCi/L.
What your radon number means covers the rest of the scale.
A long-term test runs at least 91 days. Health Canada says to base the decision to fix on a test that long.
A high short test tells you to look closer. A long test tells you whether to fix it.
Tested during a home sale? Buying or selling covers testing around a sale. For test types in general, see short vs long radon tests.
You've got time to plan it. Health Canada says within a year if your long-term result is above 200 Bq/m³, and sooner if the number's higher.
The most common fix is sub-slab depressurization. That's a pipe through the basement floor and a small fan that pulls radon from under the house and vents it outside. How a radon system works has the details.
Sealing cracks helps, but Health Canada says that on its own, it only does so much (see does sealing cracks work?).
A balanced HRV that runs all the time can lower radon by about 20 to 50%. That's less than a radon system (see radon and HRVs). We don't work on HRVs ourselves.
Health Canada recommends a C-NRPP (opens in a new tab) certified mitigation professional. Our radon professional is C-NRPP certified for residential radon measurement and residential mitigation. The certificate numbers and the link to check them are on About us.
From $3,000 plus HST
Already have a radon rough-in? Turning it into a working system starts at $2,600 plus HST when there's no sump pump.
We always quote after a visit. There's no charge for the in-home assessment or the written quote. We email the quote, and it's good for 30 days.
What moves a job up or down: access, how far the pipe runs to where it vents, crawlspaces, and the age of the sump pump. Health Canada says radon can be lowered "at a cost similar to other common home improvements." More on our prices page.
Every system we put in comes with a 91-day lab test after the install, and each one is designed with a target of below 100 Bq/m³, well below Health Canada's guideline of 200. If your results come back higher than expected, we come back, check the system and work to bring your levels down.
C-NRPP also suggests your own long-term test in the next heating season. How it works has every step.
Our lowest result after a system went in came back as 15 Bq/m³ or less, the lowest the lab reports. About that result.
You're far from the only one. In the health unit's 2015 to 2018 study (opens in a new tab), 11% of the Windsor-Essex homes tested were above 200 Bq/m³: 18% in Essex County and 6% in the City of Windsor.
Every local number and its source is on radon in Windsor-Essex.
Bring your number, the units, and whether it was a short or long test. We'll tell you what a fix would look like for your home. We answer every call and form message ourselves, within 24 hours.
Or call 519-991-8180
Monday to Friday, 9am to 5pm. Saturday by appointment.