The Saskatchewan Real Estate Commission requires disclosure of known material defects that could affect a buyer's decision or the property's value, and asbestos in vermiculite insulation or old duct wrap generally qualifies once you are aware of it, so disclose what you know rather than guessing at what a buyer might find.
A home inspection, typically $400 to $600, often flags suspect material without confirming it, since lab testing is a separate step. If a buyer's inspector raises asbestos, expect a request for testing or a price adjustment rather than a demand for full remediation before closing.
Joel Dyck has sold older Saskatoon homes with this exact issue and can advise on disclosure and how buyers typically respond. Get your hand-reviewed valuation from Joel Dyck.