Canadian Association of Radon Scientists and Technologists

Helping Canadians Reduce Radon Risk

Ontario Home Warranty

Due to homeowner's concern with radon gas as a potential health hazard within their homes, Tarion is addressing this serious issue.  The Tarion Home Warranty will cover the costs of mitigating radon from homes, provided a radon test proves a high level of radon. If radon gas within a home exceeds Health Canada’s acceptable levels of 200Bq/m3, then Tarion will cover the costs required to mitigate a home up to a limit of $15,000

Tarion Infograph

Coverage for Radon Claims

If radon gas levels exceed Health Canada’s acceptable levels of 200 Bq/m3, the home does not meet OBC guidelines, then Tarion will cover the costs of mitigating your home up to $15,000.

Process of Making a Claim

In order for radon claims to be accepted, the homeowner must supply:

  • Test results identifying average radon levels in basement (finished or unfinished, but not from crawl spaces)
  • Identification of test methodology (short-term test: less than 3 months, or long-term test: minimum 3 months as per Health Canada’s “Guide for Radon Measurements in Residential Dwellings (Homes)”
  • Test measurements and results from a certified professional by the Canadian National Radon Proficiency Program (C-NRPP). 
Radon mitigation must be completed by a C-NRPP Mitigation Professional, contact Tarion Warranty provider prior to mitigating.

For more information check out Tarion - Ontario Home Warranty Program resources:

TARION 2013 Radon Gas

Tarion Website Radon information

Tarion Twitter Feed 

Contact Tarion with questions: Call 1-877-9-TARION, (1-877-982-7466) 

Representatives are available by phone from 8:00 am to 5:00 pm, Monday to Friday. 

CARST members can access CARST's Tarion Toolkit:

Tarion Toolkit social media samples.docx

Tarion Toolkit social media images.docx

Tarion has a great new infographic.

Don’t wait to mitigate your home.  

If high radon levels are suspected, please call a C-NRPP Mitigation Professional

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