Asbestos comes up constantly in Toronto renovation discussions — and there’s a lot of misinformation. Here’s what actually matters.
When Was Asbestos Used?
Asbestos was widely used in Canadian construction from the 1920s through the late 1970s. It was banned in new construction in stages, with most residential applications phased out by 1990. Any Toronto home built before 1980 should be assumed to have asbestos in some components until tested.
Where Asbestos Is Commonly Found in Toronto Homes
- Vermiculite attic insulation (especially pre-1990 Zonolite brand)
- Popcorn/textured ceiling finishes
- Floor tiles (9" and 12" vinyl tiles from the 1950s–1970s)
- Floor tile adhesive (“black mastic”)
- Pipe insulation (especially on heating pipes)
- Drywall joint compound (pre-1978)
- Exterior stucco
- Roof shingles (some types)
The Critical Rule: Intact vs. Disturbed
Intact, undamaged asbestos-containing materials are generally not a health risk — the fibres are bound up in the material. The risk is when materials are disturbed (cut, sanded, drilled, demolished) releasing airborne fibres.
What to Do Before Renovating
- Have suspect materials tested by an accredited lab ($30–$100 per sample for lab analysis)
- Hire a certified abatement contractor if positive results are found in materials that will be disturbed
- Ontario requires asbestos abatement by certified contractors for residential work involving risk materials
Cost of Abatement
Localized abatement (one room, one material type): $2,000–$8,000. Whole-home vermiculite removal: $10,000–$25,000+.
Discuss asbestos situations in specific Toronto-era homes at home.renovation.reviews.