Do you need an asbestos survey before renovating?

Ontario Regulation 278/05 requires that before work begins on a building that may contain asbestos, the owner determines whether the materials to be disturbed actually do. In practice that means a survey — someone identifying and sampling suspect materials in the area of the work.

The obligation sits with the building owner, not the trades. That surprises homeowners regularly: your contractor asking for a survey is not being difficult, they are asking you to meet a duty that is legally yours.

A pre-renovation survey is scoped to what the work will disturb, which is why the scope of work has to exist before the survey is useful. Materials nobody is touching can stay where they are.

In a pre-1990 building, the usual suspects are drywall joint compound, textured ceilings, floor tile and the mastic beneath it, pipe and duct insulation, cement board, and vermiculite in the attic.

• →Drywall joint compound — extremely common and routinely forgotten
• →Textured and stucco ceiling finishes
• →Floor tile and black mastic adhesive
• →Pipe wrap, duct insulation and boiler insulation
• →Cement board, siding and soffits
• →Vermiculite attic insulation

A survey is a small line item early. Finding asbestos mid-demolition is not: the work stops, the area is already contaminated, the cleanup is larger than the removal would have been, and every trade waiting on that space is now idle.

There is a second cost that lands later. A renovation done through undocumented asbestos becomes a disclosure problem at sale, an insurance problem after a claim, and occasionally a liability problem involving the people who were in the building.

Asbestos sits directly in the critical path — the framers, the electrician and the client are all downstream of it. Handling the survey early, before the schedule is committed, is the difference between a planned two days and an unplanned two weeks.

It is also the cleanest way to protect your own position. You cannot be responsible for a material nobody tested for, but you can very easily be the one who disturbed it.