Chimney work covers everything above the roofline: masonry repair and repointing, crown and cap replacement, flue relining, flashing repairs where the chimney meets the roof deck, waterproofing, and inspections for creosote buildup or structural cracks. In Mississauga's freeze-thaw winters, water that gets into brick joints or a cracked crown expands when it freezes and pushes masonry apart, which is why most chimney calls here start as small leaks or spalling brick and turn into bigger repairs if they sit for a season or two. We list 11 businesses in this category that handle this kind of work.
A few things worth checking before you hire anyone for chimney work:
- Flashing expertise, not just masonry: most chimney leaks actually come from failed flashing where the chimney meets the roof, not the chimney itself. A contractor who only does brick and mortar may miss this.
- WETT certification if the chimney vents a wood-burning appliance or fireplace, since insurers often ask for a WETT inspection report after repairs or before a home sale.
- How they handle the crown and cap: a properly sloped crown and a correctly fitted cap are what keep water out long-term, so ask what material and warranty they use.
- Height and access safety: chimney work is done off a roof or on scaffolding, so confirm fall-protection practices and liability coverage.
- Written scope and photos: a good contractor will show you the actual damage (photos or a camera inspection of the flue) before quoting a fix, rather than a verbal estimate from the ground.
Our scoring weighs review volume and rating trends, licensing and insurance signals, response consistency, and how a business handles complaints or follow-up work, so you're not relying on star ratings alone. For the full ranked breakdown of roofing and chimney pros in the area, see our ranked guide to roofing contractors in Mississauga. Details on how we build these scores are on our methodology page.
