Asbestos Testing in Ontario and Quebec
We collect the sample, an accredited third-party laboratory analyzes it by polarized light microscopy, and you get a written report in 3 to 4 business days. Same-day sampling appointments are available across both provinces.
🏅 IICRC Certified 🔬 PALA Accredited Lab ⚡ Same-Day Sampling 📄 Report in 3-4 Days
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Asbestos cannot be identified by eye. A material either contains asbestos fibres or it does not, and the only way to know is to have a sample analyzed under a microscope by a laboratory. That is what an asbestos test is: a technician removes a small piece of the suspect material under controlled conditions, seals it, and sends it to an accredited lab.
Mold Busters has been testing buildings in Ontario and Quebec since 2005. We test popcorn ceilings, floor tiles, insulation, drywall and joint compound, pipe and duct wrap, and vermiculite attic insulation. If you are not sure which material to test, that is a normal starting point and one of the things the technician sorts out on site.
We provide asbestos testing only. We do not carry out asbestos removal or abatement. When a test comes back positive we tell you plainly what was found, at what concentration, and in what material, so that a licensed abatement contractor can quote the work accurately. An independent test is worth more to you when the company doing the testing is not also selling you the removal.
Which Materials in Your Home Contain Asbestos?
Asbestos was used in Canadian construction from the 1920s until the late 1980s, so age is the first filter. If your building went up before about 1990, these are the materials worth testing before you drill, sand, cut or demolish anything.
Popcorn and stipple ceilings
Textured ceiling finishes were common in homes built before the 1990s. Many were made with asbestos-contaminated vermiculite. Test before any scraping or removal project starts.
9×9 inch floor tiles
Tile size is a useful clue. The 9 by 9 inch format is the one most associated with asbestos, though 12 by 12 and 18 by 18 tiles can contain it too. The adhesive underneath is also worth testing.
Vermiculite attic insulation
Loose-fill vermiculite poured into attics before the 1990s is frequently contaminated. See our dedicated vermiculite testing page.
Pipe and duct wrap
Often hidden behind walls or above basement ceilings, and easily damaged during duct cleaning or renovation work. Damaged wrap is a higher priority to test than intact wrap.
Heat register wrap
Routinely missed in general home inspections. Because this material sits directly in the airflow path and is often friable, it is one we recommend testing in older homes.
Drywall and joint compound
The board itself is rarely the issue. The joint compound used to tape and finish the seams is the material that more often contains asbestos, which matters before any wall is opened. More on asbestos in drywall.
Not sure what you are looking at? Our asbestos resource library has photographs of each material, and the six types of asbestos page covers the minerals themselves.
How to Test a Popcorn Ceiling for Asbestos
A popcorn ceiling is tested by taking a small sample of the texture itself, not by looking at it. The technician dampens a section to keep the material from becoming airborne, removes a piece roughly the size of a coin along with any paint layers above it, and seals it in a labelled container. Sampling one ceiling takes a few minutes.
The reason to test before you start work is practical. Scraping, sanding or spraying a textured ceiling turns a bonded material into dust across the whole room. If the ceiling is going to be removed or refinished, the test result determines whether that is an ordinary renovation or a job that needs a licensed abatement contractor and containment.
If you want to know what popcorn ceilings are and why they were used, our resource page on asbestos in popcorn ceilings covers the background. This page covers getting one tested.
How Do I Test for Asbestos?
We collect the sample
A technician identifies the suspect materials, shuts down heating and cooling so nothing circulates, wets the material, and removes a small sample under controlled conditions. We take several samples of a material rather than one, because a single sample from a non-uniform material can miss asbestos that is present.
An accredited lab analyzes it
Samples go to an independent third-party laboratory, not to an in-house bench. The standard method is polarized light microscopy, which identifies asbestos fibres by their optical properties and reports the percentage and mineral type present.
You get a written report
The report arrives in 3 to 4 business days and states, for each sample, whether asbestos was detected, which type, and at what concentration. It is a document you can hand to a contractor, an employer, a buyer or an insurer.
Do not sand, scrape, cut or demolish a suspect material before the result comes back. Intact material that is left alone is a different situation from material that has been broken up.
What Is the 3-5-7 Rule for Asbestos Sampling?
The 3-5-7 rule is a sampling convention that sets how many samples to take from a given area of suspect material, based on how large it is and how uniform it looks. In broad terms it calls for three samples from a small homogeneous area, five from a larger one, and seven where the area is large or the material is visibly variable.
The logic is straightforward. Asbestos was not mixed evenly into building products, so one sample from one corner of a ceiling can come back clean while the same ceiling contains asbestos three metres away. Taking more samples from the same material reduces the chance of a false negative on a material that does contain asbestos.
This is why the number of samples affects the price of a test, and why a quote based on the number of samples is more honest than a flat per-visit figure. It is also why we take multiple samples of a material as standard rather than charging for the minimum and leaving you with a weaker result.
Book an asbestos test before the work starts
Same-day sampling appointments are available in Ontario and Quebec. Call 1-877-566-6653 or book online.
Book Your Asbestos TestHow Much Does Asbestos Testing Cost in Canada?
The cost of an asbestos test depends on three things: how many samples are taken, how many separate materials are being tested, and how quickly you need the result. A single-material test on one home is at the low end. A multi-material survey of a commercial building with rush turnaround is at the high end.
Because those variables move the number so much, we quote per job rather than publishing a fixed price, and the quote states the sample count it is based on. If you are comparing quotes, compare the number of samples included, not just the total, since a cheaper quote often covers fewer samples of the same material.
If cost is a barrier to getting the work done once a result comes back positive, our financial assistance page sets out the options currently available.
Pricing varies by property, material count and turnaround. Contact us for a quote specific to your building.
Can I Test Asbestos Myself?
Home test kits exist, and the sample still has to go to a laboratory either way. The difference is in how the sample is taken and what happens if the material is disturbed while you take it.
| Home test kit | Professional test | |
|---|---|---|
| Who takes the sample | You, without containment or respiratory protection | A certified technician, with the material wetted and the air handling shut down |
| Number of samples | Usually one, whatever the kit includes | Multiple samples per material, following the 3-5-7 convention |
| Which material gets tested | Your best guess | Identified on site, including materials owners commonly miss such as heat register wrap |
| What you receive | A lab result for one sample | A written report covering every sample, usable by a contractor, employer or insurer |
| If the material is disturbed | No controls in place | Controlled conditions throughout |
A kit can answer a narrow question about one spot. If you are testing because work is about to start, or because you need documentation someone else will rely on, the sampling method and the report matter as much as the analysis.
Asbestos Air Testing and Clearance
Bulk sampling answers whether a material contains asbestos. Air testing answers a different question: whether fibres are present in the air right now. The two are not interchangeable, and most homeowners want the first one.
Air testing is the right instrument in a narrower set of situations: after abatement work has finished and you need clearance before reoccupying a space, when a material has been damaged and you need to know whether that released fibres, or where an employer is monitoring a workplace. It is measured by drawing a known volume of air through a filter and counting fibres on it.
We provide air sampling for asbestos as part of our air quality testing for asbestos service. If you are unsure which test you need, describe the situation when you call and we will tell you which one answers your question.
Asbestos Testing Rules for Quebec Employers
Quebec places a specific legal duty on employers that does not exist in the same form in Ontario. Under the province’s occupational health and safety regulation, an employer must check buildings under its authority for asbestos, and must keep a register recording what was inspected, when, where flocking and heat-insulating materials are located, and whether asbestos was found and of which type. That register has to be available to the people who work in the building.
The regulation also sets how often those inspections are repeated and what has to happen when asbestos is identified. The provisions sit in the Regulation respecting occupational health and safety, and the regulator responsible is the Commission des normes, de l’equite, de la sante et de la securite du travail, the CNESST.
In practice this is why most of our Quebec work is documentation-driven. A building owner or property manager needs a written record with sample locations, material types and results, in a form that satisfies the register requirement rather than a verbal opinion.
PALA accredited testing for Quebec
Our Quebec asbestos testing meets the criteria of the Programme d’accreditation des laboratoires d’analyse, PALA, administered by the Centre d’expertise en analyse environnementale du Quebec. For work that has to stand up in a compliance file, the accreditation of the laboratory doing the analysis is the part that matters.
Asbestos Exposure and Where to Read About It
Asbestos fibres are only a concern when they are released into the air and inhaled. Material that is intact and undisturbed behaves differently from material that has been broken, sanded, cut or allowed to deteriorate, which is why condition matters as much as presence when deciding what to do about a positive result.
For information about asbestos and health, read the authorities rather than a contractor. Health Canada publishes Asbestos and your health, and the Canadian Centre for Occupational Health and Safety publishes a detailed page on asbestos health effects. If you have a personal health question, that is one for your doctor.
We test buildings, we do not diagnose people. What we can tell you is exactly which materials in your building contain asbestos, in what condition they are, and what the documented result is.
Why Use a Certified Asbestos Inspector
Certified since 2005
IICRC certification and two decades of Ontario and Quebec buildings behind the assessment, including the materials that get missed.
Independent lab
Analysis is done by an accredited third-party laboratory by polarized light microscopy, not in-house.
Multiple samples
We sample a material several times rather than once, which is what reduces the chance of a false negative.
Testing only
We do not sell abatement, so there is no commercial reason for us to find asbestos where there is none.
Asbestos Testing Questions
Asbestos is tested by laboratory analysis of a physical sample. A technician wets the suspect material, removes a small piece under controlled conditions with the heating and cooling shut off, and seals it. An accredited laboratory then examines it by polarized light microscopy and reports whether asbestos is present, which type, and at what percentage. It cannot be identified visually.
The cost depends on how many samples are taken, how many different materials are tested, and how fast you need results. We quote per job and state the sample count the quote covers, because comparing two quotes without that number is misleading. Contact us for a quote specific to your building.
It is a convention for how many samples to take from a suspect material: three from a small uniform area, five from a larger one, and seven where the area is large or the material looks variable. Asbestos was never mixed evenly into building products, so multiple samples of the same material reduce the chance of a false negative.
You can buy a home test kit, and the sample still goes to a laboratory. The differences are that you take the sample without containment, you usually get one sample rather than several, you choose the material yourself, and you receive a single result rather than a report. If work is about to start, or someone else needs to rely on the documentation, those differences matter.
A written report is normally ready 3 to 4 business days after sampling. Sampling appointments can often be arranged the same day you call. If you are working to a deadline, say so when booking and we will tell you what is achievable rather than promising a turnaround we cannot meet.
No. Mold Busters provides asbestos testing only, not asbestos removal or abatement. When a result is positive we give you a report detailing the material, its condition and the concentration found, which is what a licensed abatement contractor needs in order to quote the work properly.
Where We Test
Ontario
Ottawa and the surrounding region, eastern Ontario, and the Greater Toronto Area. Find your city on our locations directory for local contact details and service information.
Quebec
Montreal, Laval, the South Shore and the West Island, with PALA accredited laboratory analysis and RBQ licensing. City pages are listed in the locations directory.
Book an Asbestos Test
Tell us the building’s approximate age, which material you are concerned about, and whether work is scheduled. If you are not sure which material to test, describe what you are seeing and the technician will identify the candidates on site.
Phone: 1-877-566-6653, available 24/7
Serving Ontario and Quebec since 2005.
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