Post-Mitigation Radon Testing Winnipeg
Follow-up radon measurement that proves your mitigation system is actually keeping levels below the Health Canada guideline.
Need post-mitigation radon testing in Winnipeg?
A radon mitigation system is not a set-and-forget appliance. Fans age, sump configurations change, basements get finished, and Winnipeg's shifting gumbo clay can open new cracks in a slab over the years. The u-tube manometer on your system pipe only proves the fan is pulling suction. It does not tell you what the radon level in your living space actually is. That takes a measurement. Health Canada's guidance is to verify mitigation with a follow-up radon test after installation and to retest periodically and after major renovations. We provide post-mitigation measurement for Winnipeg homes: short-term verification after an install or repair, and long-term confirmation across a heating season, when stack effect pushes radon to its annual peak. If your numbers have crept back above 200 Bq/m3, we help diagnose the cause, whether it is a tired fan, an unsealed sump, or a system that needs another suction point. Leave a message and we will get back to you, same-day callback for most inquiries.
Common signs you need this service
- We had a system installed years ago and have never retested
- The manometer reading looks different than it did the day the system went in
- We finished the basement after mitigation and want to be sure nothing changed
- We replaced the radon fan and want to confirm the system still performs
- We bought a house that already has a system and have no idea if it works
- My consumer monitor is creeping up even though the fan is running
How we handle it
- Call (431) 444-1142 or send the quote form. Leave a message and we will get back to you, same-day callback for most inquiries.
- Quick review of your system: manometer reading, fan operation, sump lid seal, and any changes to the home since install.
- Follow-up measurement placed in the lowest lived-in level, following Health Canada measurement protocols.
- Short-term verification if you need a quick answer after an install or repair, or a long-term test through the heating season for the definitive annual picture.
- Results explained against the 200 Bq/m3 guideline and against your pre-mitigation numbers, so you can see exactly what the system is delivering.
- If levels are elevated, we lay out the likely causes and fixes, from fan replacement to additional suction points, with typical Winnipeg pricing for each.
Pricing
Typical Winnipeg pricing runs $150 to $350 for professional follow-up measurement. Long-term test kits typically run $40 to $60. That is the Winnipeg market range, not a quote. Your written number is confirmed before any work is booked, so there are no surprises on the bill.
How quickly can we get there?
Typical response: Same-day callback for most inquiries. Messages that mention a real estate deadline get priority callback, and testing visits are usually scheduled within a few business days.
Winnipeg factors that shape this work
- Winnipeg's gumbo clay keeps moving, shrinking in dry summers and swelling in wet years, so slabs and seals that were tight at install can develop new gaps over time.
- The heating season is the honest test window: a system that holds levels down through a sealed Winnipeg winter, when stack effect peaks, is a system that works.
- Basement finishing is a Winnipeg tradition, and renovations after mitigation can change airflow, cover suction points, or add new penetrations worth re-verifying.
- Sump pumps and lids get serviced regularly here because of the water table, and a lid that was not resealed after pump work is one of the most common reasons post-mitigation numbers drift up.
Ready to book?
Leave a message or send the quote form and we will get back to you, same-day callback for most inquiries. Business hours are Mon-Fri 8 to 6 and Sat 9 to 3; after-hours messages get a callback the next business morning.
Questions Winnipeg homeowners ask us
My system was just installed. When should I test?
Health Canada's guidance is to verify every mitigation install with a follow-up radon test once the system is running, rather than taking the installer's word for it. A short-term test gives you a quick early read that the system is performing, and a long-term test of at least 91 days through fall and winter gives you the definitive annual average. Our usual recommendation is both: short-term confirmation soon after install, then a heating-season long-term test for the number you actually live with. Keep both results with your system paperwork, they matter at resale.
The fan is running and the manometer looks fine. Why test at all?
Because the manometer measures suction in the pipe, not radon in your living room. A system can hold vacuum while its coverage has quietly degraded: gumbo clay movement opening new slab cracks beyond the suction point's reach, a sump lid unsealed during pump service, or a renovation changing how air moves through the basement. The only instrument that answers the question you actually care about, how much radon is in the air your family breathes, is a radon measurement in the living space. The fan running is necessary, but it is not proof.
How often should a mitigated home retest?
Health Canada recommends retesting after any significant renovation and periodically over the life of the system, and long-term tests are best run through the heating season when Winnipeg homes are sealed and stack effect is strongest. A sensible rhythm for a mitigated Winnipeg home: retest every couple of years as routine, and retest promptly after specific triggers such as fan replacement, sump or pump work, basement finishing, foundation repairs, or buying a home with an existing system. Long-term kits at $40 to $60 make routine retesting one of the cheapest pieces of home maintenance you will do.
What if my post-mitigation result is still above 200 Bq/m3?
It means the system needs adjustment, not that mitigation failed as a concept. Common causes, roughly in order: a fan that has lost performance with age, sealing gaps at the sump lid or slab edges that let the system short-circuit on house air, or sub-slab conditions where one suction point cannot reach the whole footprint and a second point is needed. Diagnostics work through those in sequence, and each fix is verified by measurement. Health Canada's up to 90% typical reduction for properly installed systems is achievable, sometimes it just takes a round of tuning to get there.
Is post-mitigation testing done by certified professionals?
Post-mitigation verification sits inside the same national framework as all radon work in Canada: the C-NRPP (Canadian National Radon Proficiency Program). Measurement professionals hold CRT certification, mitigation professionals hold CRMT certification, and Health Canada publishes the protocols covering how verification measurements are placed, timed, and interpreted. Testing arranged through us is performed following Health Canada measurement protocols, including correct detector placement and test duration, so the result is one you can rely on and document. Whoever verifies your system, make sure it is a protocol-based measurement, not a glance at the manometer.
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Other radon services we offer
Radon Testing
Professional radon measurement for Winnipeg homes, from short-term screening to the 91-day long-term tests Health Canada recommends.
Radon Mitigation
Sub-slab depressurization systems for Winnipeg homes, designed and installed following Health Canada mitigation protocols.
Real Estate Radon Testing
Deadline-driven radon measurement for Winnipeg home sales, with priority callbacks for conditional offers and tight possession dates.
Related reading
Radon Mitigation Cost in Winnipeg: What Homeowners Actually Pay
Typical Winnipeg radon mitigation pricing runs $2,400 to $3,800 installed. What drives the cost, what a quote should itemize, and how to verify it worked.
Radon Testing in Winnipeg: The Complete Homeowner Guide
How radon testing works in Winnipeg: long-term vs short-term tests, the 91-day Health Canada standard, where to place a detector, and how to read results.
Winnipeg Radon Levels: What the Latest Community Testing Actually Found
Community testing found 30% of Winnipeg homes above the 200 Bq/m3 radon guideline. What the data says, why levels run high here, and what to do.
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