Does vermiculite have to be removed before selling an Ottawa house?

No, not under any Ontario law or City of Ottawa rule we found: nothing requires vermiculite to be removed before a house sale. Whether to remove it, disclose it or leave it in place is a practical and legal question about the sale, not an abatement requirement.

What the federal guidance says

Health Canada advises that vermiculite-based insulation may contain asbestos, and the federal vermiculite page on canada.ca says there is currently no evidence of risk to your health if it is sealed behind wallboards and floorboards, isolated in an attic, or otherwise kept from exposure to the interior environment. So undisturbed vermiculite in a sealed attic is not automatically a removal job. Health Canada's advice is specific: don't use the attic for storage, keep children out of it, don't disturb the material or attempt to remove it yourself, and apply caulking to seal openings or gaps around the attic hatch, baseboards, light fixtures, outlets, and window and door frames.

If you do plan to renovate in a way that would disturb the vermiculite, Health Canada says to hire professionals trained to handle asbestos. Removal falls under O. Reg. 278/05, Ontario's asbestos regulation. Which Type of operation applies depends on how much friable material is disturbed and the method used, both of which the contractor assesses on site. Vermiculite attic removal is a larger job: published Ontario contractor prices, read in September 2026, run roughly $5,000 to $25,000 per attic.

Disclosure is a real estate question, not an abatement question. A lab test tells you what your vermiculite actually contains, since Health Canada says it may contain asbestos. A pre-renovation inspection with asbestos testing runs roughly $250 to $1,300 depending on the size of the building and the number of samples, based on published Ontario contractor prices read in September 2026. Having a test result in hand gives you a factual answer to pass on, whatever you decide to do with it. Ask your real estate lawyer about your disclosure obligations for the sale itself.

If the vermiculite has already been disturbed during a renovation or while clearing the attic, stop the work, don't disturb it further, and have it tested by a professional. Local abatement contractors listed in the Ottawa Construction Network directory can be reached through the request form on this page.