Articles

Flat-vector house being air-sealed with radon trapped inside — radon and energy retrofits in Quebec
Radon and energy-efficiency renovations: why you must test after the work
General information for Quebec homeowners, buyers and renters, drawn from public sources (Health Canada, CMHC, the Government of Quebec, Natural Resources Canada). It is not medical, legal or building-engineering advice.... Read more...
Flat-vector school building with a radon detector — radon in Quebec schools and daycares
Radon in Quebec Schools and Daycares (CPE): But What About Your Child's Home?
Quick answer: Yes. Starting in August 2011, Quebec's ministère de l'Éducation launched a large-scale radon screening effort; every school board was required to measure radon in all of its elementary... Read more...
Flat illustration of a civic office building with a symmetrical facade and wide front steps.
Radon and the Federal Workplace Limit: What Band Councils Need to Know
Band councils are federally regulated employers. From January 30, 2027, the employer must ensure no employee is exposed to an annual average above 200 Bq/m³. The measurement window runs October... Read more...
Flat illustration of a small puck-shaped radon detector on a floor in an empty room.
Commercial Radon Testing in Canada: Process, Detector Counts and Cost
Commercial radon testing uses long-term detectors (minimum three months, during the heating season) in every occupied ground-contact room, one per 200 m² in larger rooms, plus roughly 10% duplicates for... Read more...
Flat illustration of a neat stack of blank documents and a folder.
What a Compliant Workplace Radon Record Contains
A compliant radon file is five things, not one: the hazardous substance record; the qualified person's signed written report; the employer's written control procedure, kept current and available to employees;... Read more...
Flat-vector illustration of a new house beside a warranty certificate — GCR new-home warranty and radon in Quebec
Does the GCR Warranty Cover Radon in a New Home in Quebec?
Short answer: No. The mandatory warranty plan administered by the Garantie de construction résidentielle (GCR) does not mention radon anywhere and does not cover it as a named defect. The... Read more...
Flat illustration of a low-rise commercial building.
Does My Workplace Need Radon Testing? Federal and Provincial Rules
Federal (banks, airlines, railways, interprovincial trucking, marine, pipelines, telecom, broadcasting, postal and courier, grain elevators, Crown corporations, First Nations band councils, federal public service): a hard 200 Bq/m³ annual-average limit... Read more...
Flat illustration of a neat stack of blank documents and a folder.
Can't Test Every Building This Season? How Phased Radon Compliance Works
There is no published scheme granting extensions for radon. Read more...
Flat illustration of a low-rise commercial building.
Post-Mitigation Radon Verification: Who Should Test After the System Goes In
Start a short-term test at least 24 hours after the fan is activated, ideally in the same locations originally measured. Follow it with a long-term test of at least three... Read more...
Flat illustration of a small puck-shaped radon detector on a floor in an empty room.
Does a Certified Professional Have to Do Your Radon Testing?
The Canada Occupational Health and Safety Regulations require the employer to appoint a "qualified person," defined as someone who, because of their knowledge, training and experience, is qualified to perform... Read more...
Flat-vector house cross-section with a radon vent pipe rough-in under the slab — Quebec Building Code and radon
Quebec's Building Code and Radon: The Mandatory Pipe Is Not Enough
Does the Quebec Building Code protect against radon? Only partly. Since June 2, 2022, the Code has required a sub-slab pipe and a passive extraction column in the new buildings... Read more...
Flat abstract illustration of a round meeting table seen from above with evenly spaced seats.
Radon at Work: A Guide for Workers and Health & Safety Committees
The short version: Ask whether the building has been tested, in writing, through your committee. A proper test is long-term (3+ months, heating season), with a detector in every occupied... Read more...