Frequently Asked
Everything you need to know about radon gas, testing, and mitigation.
For Homeowners
Radon is a naturally occurring, colorless, odorless radioactive gas produced by the breakdown of uranium in soil, rock, and water. It is the second leading cause of lung cancer after smoking. Read our full guide to radon →
Radon gas escapes from the ground and can enter a home through cracks in foundation walls and floor slabs, construction joints, gaps around service pipes, support posts, window casements, floor drains, sumps, or cavities inside walls. Not sure if your home is at risk? Try our situation assessment →
Health Canada's guideline for radon in indoor air is 200 Becquerels per cubic meter (200 Bq/m³). If your home tests above this level, Health Canada recommends taking action to lower it. Use our result interpreter to understand your reading →
The cost heavily depends on your home's foundation and construction type. On average in Canada, a standard active sub-slab depressurization system costs between $2,000 and $3,500. Find a certified contractor for a quote →
The Canadian National Radon Proficiency Program (C-NRPP) is a certification program established by Health Canada. Contractors with this certification have undergone specific training to test and mitigate radon according to national standards.
For Contractors
Our directory is built from C-NRPP certified professional data. If you're certified and don't see your listing, email us at hello@radonfinder.ca and we'll get you added.
If your business already appears in our directory, visit your listing page and click 'Is this your business? Verify your listing.' You'll receive a confirmation email with a link. Once verified, your listing gets a Verified badge and your profile is marked as claimed.
Email us at hello@radonfinder.ca with your business name, your RadonFinder.ca profile URL, and the details you'd like updated (phone number, website, service area, photos, etc.). We'll update your listing within 1–2 business days.
We display your Google rating and review count directly on your profile, since that's the rating homeowners trust most. RadonFinder doesn't host its own review system; keep earning Google reviews and they'll appear on your listing automatically.
Still have questions?
Email us at hello@radonfinder.ca and we'll get back to you within 1 business day.