Radon Mitigation in Winnipeg
A high long-term radon result can usually be reduced substantially. Learn how professional mitigation works and what to ask before choosing an installer.
When does Health Canada recommend action?
Canada’s radon guideline is 200 Bq/m³. Health Canada recommends taking corrective action when the average annual radon level in a normally occupied part of the home exceeds that guideline, with action taken sooner as the concentration becomes higher.
If the number you have comes from a short-term screening device, first understand how that result differs from the long-term measurement used for the guideline.
How does radon mitigation work?
The most common professional method is active soil depressurization, often called sub-slab depressurization. A pipe is installed through or beneath the foundation and connected to a fan. The system draws soil gas from beneath the home and exhausts it outside before radon can enter the living space.
Health Canada says a professionally installed mitigation system can be installed quickly in many homes and can reduce radon levels by more than 80% in most homes. The design still needs to match the building, foundation, and pathways through which soil gas is entering.
1. Assess
Review the test result, foundation type, sump, slab, finished areas, and potential suction locations.
2. Design & Install
A professional selects the suction point, pipe route, fan, exhaust location, seals, and monitoring components suited to the home.
3. Verify
Follow-up testing confirms the system is reducing radon as intended. Long-term re-testing remains important over time.
Questions to ask a mitigation professional
- Are you currently certified through the Canadian National Radon Proficiency Program (C-NRPP)?
- What mitigation method do you recommend for this foundation, and why?
- What is included in the written quote?
- Where will the fan, piping, and exhaust terminate?
- What post-installation testing is included or recommended?
- What warranty applies to the installation and fan?
Looking for local help?
Tell us about your test result and home. Winnipeg Radon Help can use that information to respond and, where appropriate, connect you with a qualified local radon professional.
Official mitigation resources
Independent resource: Winnipeg Radon Help provides general educational information and a way to request local assistance. It is not itself a radon testing or mitigation contractor, medical provider, government agency, or emergency service. For testing and mitigation, Health Canada recommends using appropriately qualified professionals, including C-NRPP-certified radon professionals.