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Illustrated cross-section of a Canadian home showing a radon vent pipe rising from the basement through the roof
Canadian Building Codes and Radon: What Ontario Homeowners Need to Know (2026 Guide)
How Canadian building codes deal with radon — federally, provincially, and in Ontario specifically. Plus the Hamilton, Guelph, and Kingston municipal programs. Read more...
A classic Canadian suburban two-storey brick home in autumn with a red-and-white 'For Sale' sign in the front yard and maple leaves on the lawn
Radon Testing When Buying or Selling a Home in Canada (2026): A Buyer's, Seller's, Realtor's & Lawyer's Guide
Canadian buyers, sellers, realtors and lawyers: what to disclose, when to test, how to use a holdback or conditional offer, and which test counts. Province-by-province. Read more...
Flat-vector house cross-section showing radon gas rising into the basement — radon in basements in Canada
Radon in Basements: Why It Concentrates There, How to Test It, and What to Do (Canada, 2026)
Basements have higher radon than upper floors. Here's why — and what every Canadian should do about it. Stack effect, testing, mitigation explained. Read more...
Flat-vector illustration of a water well with a droplet — radon in Canadian well water
Radon in Canadian Well Water (2026): What Health Canada Actually Says, Where the Risk Is Real, and What to Do If You're on a Private Well
Plain-English guide for Canadian well-water owners. Health Canada's actual position on radon in drinking water, where in Canada wells contain the highest measured radon, the water-to-air transfer ratio, and treatment... Read more...
Flat-vector illustration of a multi-unit rental building with a key — radon obligations for Canadian landlords
Radon for Canadian Landlords and Rental Properties (2026): Obligations, Risks, and Best Practices
Canadian landlord-tenant law generally requires habitable rental units. How that obligation interacts with radon — plus best practices for testing. Read more...
Flat-vector illustration of an apartment building with one highlighted unit window — radon information for Canadian renters
Radon for Canadian Renters (2026): What You Should Know, What You Can Ask, and What You Can Do
Renters can test their rental for radon — and Canadian habitability law generally requires landlords to address elevated levels. Your rights, explained. Read more...
Flat-vector illustration of a newly-built home cross-section showing a radon rough-in pipe through the foundation slab on a cream background
Do New Homes Have Radon in Canada?
A radon rough-in doesn't prove your new home is below 200 Bq/m³ — you still need to test after occupancy. New-build radon, codes and warranty explained. Read more...
Flat-vector illustration of a multi-storey condo building cross-section with a radon detector in the lowest unit on a cream background
Radon in Condos & Apartments in Canada
Do high floors have radon? Why apartment and condo units — especially lower floors — should test, what Health Canada says, and how renters can test. Read more...
Flat-vector illustration of a Canadian school building and an office building, each with a radon detector visible inside, on a cream background
Radon in Workplaces, Schools & Daycares in Canada
Radon duties for Canadian workplaces, schools and daycares — the Canada Labour Code limit (harmonizing to 200 Bq/m³ by 2027), provincial OHS, where school/daycare testing is mandatory, and how to... 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-vector illustration of a radon detector, a certificate with a checkmark seal, and a lab flask — a C-NRPP-approved detector analysed by a C-NRPP certified lab
"Health Canada Approved" Radon Detectors: What That Actually Means
Thousands of Canadians searched some version of "Health Canada approved radon detector" this year. It is one of the fastest-growing radon searches in the country — and it has a... 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-vector condominium cross-section with radon rising into lower units — radon in a Quebec condo
Radon in a Quebec Condominium (Copropriété): Who Is Responsible, the Syndicate or the Co-owner?
Read this first. This is general information for co-owners, syndicate of co-owners directors, and condo buyers in Quebec, drawn from public sources (Civil Code of Québec, Éducaloi, Régie du bâtiment... Read more...
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-vector office workplace with a radon detector and hard hat — radon at work in Quebec (CNESST)
Radon in the Workplace in Quebec: The Employer's Obligations (CNESST)
Quick answer: Yes — but the details matter. In Quebec, the provincial occupational health and safety regime — the Act respecting occupational health and safety (LSST), enforced by the CNESST... Read more...