Why test for radon?
Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. It enters buildings through slab cracks, construction joints, gaps around pipes, sumps and floor drains. Health Canada identifies it as the leading cause of lung cancer after smoking.
Which test?
A long-term test (at least 3 months, ideally during the heating season) is the reference recommended by Health Canada, because radon levels vary from day to day and season to season. The real estate test gives a quick indication during a transaction; a long-term test is still recommended afterwards.
How it works
- We place the detector on the lowest lived-in level, often the basement, in a room used several hours a day.
- It stays in place for the planned period, about 3 months for a long-term test.
- It is analysed in a laboratory.
- You get a report with your average level in Bq/m³ and our recommendations.
Reading your result
Health Canada’s guideline is 200 Bq/m³. Between 200 and 600 Bq/m³ it recommends fixing within 2 years; above 600 Bq/m³, within 1 year. If you are above the guideline, see radon mitigation.
Frequently asked questions
How long does a radon test take?
A reliable test lasts at least 3 months, ideally during the heating season. A short test is only an indication, for example during a real estate transaction.
Where should a radon detector go?
On the lowest lived-in level of the building, often the basement, in a room used several hours a day, away from windows, doors and heat sources.