Long-term home test
An early reading at 2 weeks, then the full 91+ day result. Certified placement, lab analysis and a written report. The basis for any mitigation decision.
Radon testing
Radon testing done the way Health Canada recommends
An early reading in as little as 2 weeks, and the full 91-day result Health Canada recommends. Placed by a C-NRPP certified technician, analyzed by an accredited lab, and explained in plain language. You’ll know your number, what it means, and what (if anything) to do next.
Every test includes
- Placement by a C-NRPP certified technician
- Detectors on every lived-in level that matters
- An early reading from a calibrated monitor at 2 weeks
- Accredited lab analysis with chain of custody
- Written report against Health Canada’s guideline
- A call to walk you through the result
Test options
The right test for the question you’re asking
Real estate screening
A professional short-term test scheduled around your conditional period, with results both parties can rely on.
Post-mitigation check
Confirm a system is working: a short check after install, then a long-term test to document your new average.
New-build & warranty testing
Long-term tests that meet Tarion’s three-month requirement, by a C-NRPP certified professional.
Why 91 days
Radon changes by the hour. Your decision shouldn’t.
Wind, temperature and how you use your home make radon rise and fall through every day and every season.
A reading from a weekend can be several times higher or lower than your home’s real yearly average. That’s why Health Canada’s guideline is based on long-term tests of at least three months, ideally between October and April.
91 days minimum.
Radon swings hour to hour and season to season. Three months or more, through the heating season, gives a true annual average. An early reading at day 14 tells you sooner if it’s clearly high.
Radon swings hour to hour and season to season. Three months or more, through the heating season, gives a true annual average. An early reading at day 14 tells you sooner if it’s clearly high.
Early reading
A likely answer at 2 weeks. The full answer at 91 days.
You don’t have to wait three months to know whether your home is clearly high.
On placement day we set a calibrated professional monitor next to your long-term detector. It logs radon every hour for the first 2 weeks, then we send you an early reading. When that reading is far from Health Canada’s 200 Bq/m³ guideline, it’s a strong signal of where your 91-day result will land, especially in winter. Near 200, it can go either way.
The long-term detector stays in place either way. Health Canada and C-NRPP base mitigation decisions on a long-term test, and so do we.
400+ Bq/m³Very likely high. Book the fix now if you’d rather not wait; a test after the install confirms it worked.
Act early100–399 Bq/m³Could land either side of 200. Wait for the 91-day result.
WaitUnder 100 Bq/m³Very likely below the guideline in winter. Finish the test to be sure.
Likely fineThe 400 cut-off is double the guideline: our own cautious judgement, not a published rule.
Your report
A result you can actually use
Your report shows your average concentration in Bq/m³ for each detector, the dates and locations, and a clear comparison to Health Canada’s guideline and timelines. It meets the documentation needs for real estate and for Tarion warranty claims.
Then we call you to explain it. If your result is low, that’s the end of it. If it’s high, we’ll explain your options, including what a system would involve and cost.
Long-term radon measurement
Alpha-track · 94 days · Nov 2 – Feb 4
C-NRPP protocol
Alpha-track · 94 days · Nov 2 – Feb 4
Basement family roomLowest lived-in level
286 Bq/m³Basement bedroomSecond detector
301 Bq/m³Interpretation: above Health Canada’s 200 Bq/m³ guideline. Recommended: reduce within 2 years. A sub-slab depressurization system is expected to bring levels well below 100 Bq/m³.
DIY or professional?
Both are valid. Here’s the difference.
| DIY long-term kit | IAQ Solutions professional test | |
|---|---|---|
| Test length | 91+ days | 91+ days (or short-term screening for real estate) |
| First answer | When the lab result arrives, 3+ months after you start | An early reading at 2 weeks, then the full result |
| Placement | You follow the instructions | Certified technician, every relevant level |
| Lab | Kit supplier’s lab | Accredited lab, chain of custody |
| Report | Number and basic guidance | Written report plus a call to explain it |
| Real estate & Tarion | May be accepted if from a C-NRPP listed device | Documentation built for both |
| Cost | Well under $100 | Fixed price quoted when you book |
Going DIY? Choose a long-term kit from a C-NRPP listed supplier and follow our placement guide. If your result comes back high, we’re happy to take it from there.
Questions
Radon testing FAQ
How long does a professional radon test take?
You get an early reading after 2 weeks and the full result after at least 91 days. The placement visit takes about 30 minutes, and lab results usually follow within a few weeks of pickup.
Can I get a result sooner than 91 days?
Yes, an early one. A calibrated monitor runs next to your long-term detector for the first 2 weeks. If it reads 400 Bq/m³ or more, your 91-day result is very likely high too, and you can book a fix now. Near 200, it can go either way, so we wait for day 91.
Do I need to be home during the test?
Only for the placement and pickup visits. During the test, live normally. The guideline is based on normal living conditions.
Can you test faster for a real estate deal?
Yes. We offer short-term screening tests that fit a conditional period, with a written result for both parties, and recommend a long-term test after closing.
Will you try to sell me a system?
No. About seven in eight Ontario homes test below the guideline. If yours does, we’ll tell you so, and that’s the end of it. If it’s high, we’ll explain your options; you’re never obliged to use us for mitigation.
What if my home has a basement apartment?
We test each lived-in level that matters, including the suite, and report results separately so owners and tenants both have clear information.