Asbestos Testing Before Renovating in Manitoba: Vermiculite and the 2025 Rules

Asbestos is rarely a reason not to renovate an older house, but it decides the order of the work. Anything that might contain it has to be identified before walls, floors or ceilings are opened, or the job stops when it turns up.

This guide covers where asbestos can be found in older Manitoba homes and who should test for it. It also covers vermiculite insulation and what Manitoba’s December 2025 rule changes mean for a renovation. It uses Health Canada and Province of Manitoba sources, checked on October 15, 2026.

Could your house contain asbestos?

Possibly, if it is older. Health Canada says “Before 1990, asbestos was mainly used for insulating buildings and homes” against cold weather and noise, and for fireproofing. Making, importing, selling and using products that contain asbestos is now prohibited in Canada, but older building materials may still contain it.

Manitoba Workplace Safety and Health says asbestos-containing material was used in homes and buildings built or renovated before 1990. Health Canada lists the older materials where it may still be found:

Materials from Health Canada’s Asbestos and your health page (dated 2023-02-10). The second column is our own planning note, not part of Health Canada’s list.

Vermiculite insulation was not rare here. Manitoba Health cites Natural Resources Canada’s EnerGuide for Houses evaluations from June 1, 2004 to March 22, 2005. Of the 3,184 Manitoba homes evaluated, 215 (6.6 per cent) contained vermiculite insulation, against 3.7 per cent across Canada. That is a 2004–05 survey on an undated provincial page, not a current count.

Age and appearance only raise the question. Manitoba’s workplace safety FAQ describes how it is answered. A competent person collects representative bulk samples of the suspect material, and an accredited laboratory analyses them for a definitive result.

Is asbestos dangerous if you leave it alone?

Usually not. Health Canada says materials containing asbestos in your home pose no significant health risks when they are left undisturbed or isolated in an attic. The same goes for materials sealed behind walls and floorboards, or tightly bound in products that are in good condition.

The risk comes when fibres get into the air. Health Canada lists renovation and demolition activities such as drilling, sawing, sanding and scraping. It says breathing in asbestos fibres can cause lung cancer, asbestosis, mesothelioma and other diseases. That is why a renovation, not the house itself, is the moment to test.

Who should test for asbestos, and when?

A professional, before the work is planned. Health Canada’s advice is to “hire a professional to test for asbestos before renovating or remodelling.” If asbestos is found, it says to hire a qualified asbestos removal specialist to remove it safely. Test before the strip-out is scheduled, not during it, so the results shape the quote and schedule.

Until a qualified person rules it out, Manitoba’s regulation deems any material likely to contain asbestos to be asbestos-containing material (s. 37.2(2)). On a work site, untested suspect material is treated as asbestos. When you book testing:

• Tell the tester what the renovation will disturb: which walls, ceilings, floors, pipes and attic areas.
• Ask which accredited laboratory will analyse the samples, and get the results in writing.
• From June 1, 2027, sampling and inventory work must be done by a person with a valid asbestos certificate, and the firm must be registered. The Province says a public registry will show what each firm is registered for, abatement or sampling.
• Share the results at your contractor’s on-site visit, before the quote is written.

What changed in Manitoba’s asbestos rules in December 2025?

Manitoba changed its asbestos rules with M.R. 108/2025, registered December 4, 2025. It rewrote the definition of asbestos-containing material and replaced Part 37 (Asbestos) of the Workplace Safety and Health Regulation. The Province’s news release that day said most amendments take effect on registration, while certification and employer registration start June 1, 2027.

Sources: M.R. 108/2025 on Manitoba Laws and the Province’s New Asbestos Regulations FAQ, both read October 15, 2026.

These are workplace safety rules: Part 37 “applies to every workplace where asbestos is present,” and most of its duties fall on employers and owners. If you plan to do any of the work yourself, ask Workplace Safety and Health how the rules apply before you start.

The notice is filed online. The Province’s Notice of Asbestos Work form asks for the dates, the owner or prime contractor, the abatement contractor and the risk type. The confirmation number it returns serves as the serial number. Ask your abatement company who files the notice for your project.

What about vermiculite insulation in the attic?

Leave it undisturbed. Manitoba Health says some vermiculite produced at the Libby mine in Montana from the 1920s until 1990, sold mainly under the brand name Zonolite, was found to contain asbestos. It says it is “reasonable to assume” that older vermiculite-based insulation may contain some. Manitoba’s new definition of asbestos-containing material explicitly includes vermiculite insulation that contains asbestos.

If you have, or think you may have, vermiculite insulation in the attic, Manitoba Health and Health Canada recommend these precautions:

• Seal cracks and holes in the ceilings below, for example with caulking around light fixtures and the attic hatch.
• Keep children out of the attic, and restrict access to it.
• Don’t use the attic for storage if getting items out could disturb the insulation.
• Make sure anyone working in the attic knows asbestos may be present.

For removal, or if you are planning renovations, Manitoba Health says to speak to a professional qualified in dealing with asbestos. It says you “should not attempt to remove the insulation yourself, unless you have been properly trained” and have the necessary specialized equipment.

If the attic is part of an insulation upgrade, check the timing of the Efficiency Manitoba insulation rebate first. It has to be approved before old insulation is removed.

What happens to the schedule if asbestos turns up mid-job?

Work in that area stops. Before a renovation proceeds, Manitoba’s regulation requires measures that keep asbestos-containing material in the work area from being released. Before demolition, materials that could release it must be removed safely (s. 37.9(1)). From June 1, 2027, that removal must be done by someone certified for abatement work.

That is specialist work. Bridgeland Builders doesn’t test for or remove asbestos: a qualified specialist does, and we schedule the rest of the renovation around their work.

Planned asbestos work also needs the 5- to 10-day notice and a serial number before it starts. That is one more reason to find asbestos before the schedule is set. On our interior strip-outs, testing of older materials happens before demolition is scheduled.

How do you plan around asbestos in a kitchen, bathroom or flooring job?

Start from what the renovation will disturb, and have those materials tested before the design is final. By type of project:

• Kitchens: original plaster, drywall and floor tiles are on Health Canada’s list, so on a kitchen renovation have them tested before the cabinets come out.
• Bathrooms: floor tiles, plaster and insulation around hot water pipes can all be disturbed in a bathroom renovation, so test them before demolition.
• Flooring: older floor tiles are on the list too, so test them before flooring removal starts, not once the first tile is up.
• Several rooms: a whole-home renovation opens much of the house at once. Test everything the plan will disturb in one round, so the results come back before the design is final.

Asbestos is one of several checks in an older house. Our guide to renovating a character home in Winnipeg covers lead paint and wiring. The home renovation planning guide shows where testing fits in the order of a project.

Next step

Bring any test results to a free on-site visit. We’ll walk the space with you, note the older materials your plan would disturb, and schedule the renovation around a qualified specialist’s testing and any removal. You then get a free written quote. We reply within one business day.