Chimneys take the worst weather beating of any part of a Toronto roof. Freeze-thaw cycles crack masonry, ice damming pushes water under flashing, and decades of Toronto winters wear down mortar joints until a stack starts leaking into the attic or living space. This category covers the 48 businesses in Toronto that handle chimney work: inspections, repointing, crown and cap repair, flashing replacement, liner installation, rebuilds above the roofline, and full teardown-and-rebuild jobs when a chimney has deteriorated past patching.
What the work actually involves
Most chimney jobs fall into a few buckets. Repointing repairs crumbling mortar joints in the brick stack, usually the first sign of trouble after a hard winter. Flashing work reseals the joint where the chimney meets the roof deck, a spot that fails often because it moves differently than the surrounding shingles. Crown repair fixes the concrete cap that sheds water off the top of the stack. Liner work addresses the flue itself, which matters for both water damage and, on wood-burning or older gas systems, safety. Full rebuilds come into play when a chimney has shifted, spalled badly, or was never built to current standards.
What to check before hiring
Ask whether the company pulls permits for structural rebuild work, since Toronto requires this above a certain scope. Get a clear description of materials, matching mortar mix and brick where visible repairs are involved matters for both looks and how well the patch holds. Ask how they handle flashing, tied into the roofing membrane properly rather than just caulked over, since caulk-only fixes tend to fail within a season or two. And ask what a WETT inspection or liner assessment would look like if the chimney is still in active use, since that's a different scope than a purely cosmetic repair.
How we score contractors here
Our ranking weighs verified licensing and insurance, how a contractor handles masonry versus roofing-side chimney work (many firms are strong at one and weak at the other), response time on inspection requests, and patterns in customer feedback around whether repairs actually held up over a full winter. For the full ranked list with scores and reasoning, see our best roofing contractors in Toronto guide. Our scoring approach is explained in full on the methodology page.
