Chimney Repair Toronto: Flashing, Crowns and Caps
Chimney repair across Toronto and the GTA since 2005. We stop leaks at the roof-to-chimney junction with new flashing, crown and mortar repairs, and waterproof caps, from a licensed, bonded and insured crew.
Chimney leaking? Don’t wait.
Stop Chimney Leaks Before They Cause Interior Damage
A leaking chimney is not something to leave until spring. Water that gets past failed flashing runs down inside the wall cavity, soaks insulation, rots roof sheathing and shows up as a stain on a bedroom ceiling months before anyone connects it to the roof. Most of the chimney repair Toronto homeowners actually need starts at that junction rather than with the brickwork itself. Our freeze and thaw cycle is brutal on mortar and sealant: water works into a hairline crack, freezes overnight, expands, and opens the crack a little wider every time. The Roof Technician has worked on chimneys across the GTA since 2005, and we run 24/7 emergency service for the leaks that cannot wait.
Complete step and counter flashing replacement, not a sealant patch
Mortar joint repointing, brick replacement and crown rebuilds
Stainless steel chimney caps and rain covers that keep water out
Chimney Crown, Cap and Mortar Repair Across the GTA
A chimney has three defences against Toronto weather, and all three wear out on their own schedule. The crown is the sloped concrete slab on top that sheds water away from the flue; when it cracks, water pours straight into the masonry below it. The cap is the stainless steel cover over the flue opening that keeps rain, snow and animals out of the chimney itself. The mortar joints between the bricks are usually the first thing to go, because mortar is deliberately softer than brick and absorbs water. We assess all three on every visit, rather than fixing the one thing you called about and leaving the next failure for you to discover in February.
Whether you have a masonry chimney on a century home in Leslieville or a prefabricated metal flue on a newer build in Vaughan, our technicians use materials rated for Canadian winters. That means flexible flashing membranes that tolerate seasonal movement, mortar matched to the strength and colour of the existing brick, and stainless rather than galvanised caps that rust out inside five years. Every repair is quoted in writing before we start, and the estimate is free with no obligation.
Chimney Repair Options Compared
Repair Type
Flashing Replacement
Crown Repair
Cap Replacement
Full Rebuild
Best For
Leaks at the roof-to-chimney junction
Cracked or crumbling concrete crown
Missing, rusted or undersized cap
Spalling brick or a leaning stack
What Is Involved
New step and counter flashing set into the mortar
Crown recast, sloped and sealed
Stainless steel cap sized to the flue
Brick and mortar rebuilt from the roofline up
Warning Sign
Ceiling stains near the chimney chase
Concrete chunks in the eavestrough
Rain, birds or debris in the firebox
Bricks flaking, bulging or shifting
Toronto Benefit
Closes the single most common roof leak point
Keeps water out of masonry before it freezes
Stops moisture and animals entering the flue
Restores the chimney for decades, not seasons
Typical Timeline
Half a day
One day
One to two hours
Two to three days
Chimney Flashing: The Most Critical Waterproofing Point
If your roof is leaking near the chimney, flashing is the first thing we look at. Flashing is the layered metal that ties the chimney into the roof surface: step flashing woven into each shingle course up both sides, counter flashing let into a groove cut in the mortar joint above it, an apron at the front, and a cricket behind wider chimneys to divert water around them. When any of those layers is missing, too short, or held together with roofing tar, the junction leaks.
Tar and caulking are the two things we find most often on failed chimneys, and both are temporary. Sealant stays elastic for a few seasons, then hardens, shrinks and pulls away from the brick, usually in the middle of winter. Proper flashing does not rely on adhesive to stay watertight; it relies on overlap and gravity. That is why we replace the whole assembly instead of patching over it.
Chimney leaks rarely travel straight down, so the damp patch on your ceiling is often several feet from the actual entry point. If staining has already appeared, our roof repair team in Toronto can trace the path and replace the wet decking and underlayment at the same time. On low slope buildings the same principles apply where a flue passes through a flat roofing membrane.
Common Chimney Problems We Fix
Failed Flashing
Water enters where old, tarred or undersized flashing meets the brick. We strip it out and install new step and counter flashing properly set into the mortar joint.
Cracked Crown
The concrete slab on top splits in the freeze and thaw cycle and lets water straight into the masonry. We recast it with a proper overhang and a drip edge.
Spalling Brick and Open Joints
Saturated brick faces pop off and mortar washes out of the joints. We repoint and replace damaged brick before the stack starts to move.
Why Toronto Homeowners Choose The Roof Technician for Chimney Repairs
Roofing and chimney work across the GTA since 2005, with over 20 years of local experience.
Fully licensed, bonded and insured crews on every job.
Flashing, mortar and cap materials rated for Canadian freeze and thaw cycles.
24/7 emergency response when a chimney leak cannot wait until Monday.
FAQ
Chimney Repair Questions Toronto Homeowners Ask
How do I know if my chimney flashing needs repair?
The usual signs are water stains on the ceiling or wall near the chimney chase, a damp or musty smell in the attic after rain, visible gaps or daylight where the chimney meets the roof, and dark streaks running down the brick. From the ground you can often see tar smeared along the joint, which almost always means the original flashing has already failed. We inspect the junction from the roof and send photographs with the estimate so you can see exactly what we found.
Can a damaged chimney really cause a roof leak?
Yes, and it is one of the most common causes we find in Toronto. The chimney interrupts the roof surface, so every layer has to be tied in correctly. Failed flashing, a cracked crown or open mortar joints all let water reach the roof deck, and because water travels along rafters before it drops, the stain inside can appear well away from the chimney itself. Repairing the chimney and the surrounding decking together is usually what ends the leak for good.
Do you repair both masonry and prefabricated metal chimneys?
We do. That covers brick and stone masonry chimneys, prefabricated metal flues and chases on newer homes, and the flashing details on both. If a chimney has been decommissioned and is no longer in use, we can also cap it permanently or take it down to the roofline and close the opening properly, rather than leaving a redundant leak point on your roof.
How long does chimney repair take, and when can it be scheduled?
Most flashing replacements are a half day. A crown recast is usually a full day, and repointing or a rebuild from the roofline up runs two to three days depending on the size of the stack. Masonry needs temperatures above freezing to cure properly, so mortar and crown work is scheduled between spring and late fall, while flashing repairs and emergency leak calls are handled year round.
Chimney Repair Throughout Toronto and the GTA
Our crews cover North York, Etobicoke, Scarborough, East York, Old Toronto and the downtown core, and we travel across the wider GTA to Mississauga, Brampton, Vaughan, Richmond Hill, Markham and Oakville. Chimney problems look different depending on where you are. Century homes in Riverdale and the Annex tend to have soft historic mortar that needs a carefully matched mix, while 1960s and 1970s subdivisions in Scarborough and Mississauga usually need crown and cap work on chimneys that have never been touched since the day they were built.
Because the chimney is only one part of the roof system, we look at how it fits with everything around it. If the attic below is holding moisture, our attic ventilation specialists can correct the airflow at the same time, and if the surrounding shingles are near the end of their service life it is often cheaper to combine the chimney work with a full roof replacement than to pay for roof access twice.
Book a free, no-obligation chimney inspection and we will tell you honestly whether you need a repair or a rebuild.
Request a Free Chimney Repair Estimate
Top-Quality Roofing Solutions
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Address
52 Tewsley Pl, Etobicoke, ON M9P 1N7
Call Us
(416) 826 -0040
Email Us
in**@***************an.com
Protect Your Home with Toronto’s Chimney Repair Specialists
Don’t wait for a small chimney leak to turn into a major roof repair. Get a free, no-obligation estimate from The Roof Technician today.