Roof Leak Repair
Roof Repair That Finds the Leak, Not Just the Stain
Water rarely gets in where the ceiling stain shows up. We trace leaks, wind damage and failed flashing back to the source and repair it so it stays dry.
- Free estimates
- Licensed and insured
- Homes and businesses
Get your free estimate
Tell us about the job. We will get back to you quickly to book a time.
Prefer to talk? (289) 683-9727
Repairs for homes and businesses across Southern Ontario
James Roofing handles roof repair for houses and commercial buildings across Hamilton, Toronto, Niagara, Halton and Peel. Leaks, blown-off shingles, cracked vent boots, flashing failures and storm damage make up most of the work. Call (289) 683-9727 or send a request for a free estimate, and we’ll get up on the roof, find the problem and tell you what it takes to fix it.
A good repair starts with finding where the water actually gets in. It travels along rafters and across the top of the deck before it drips, so a stain in the upstairs hallway can come from a chimney two metres away. We check the roof surface, the flashing and the attic side together, then fix the cause instead of covering the symptom with sealant. That’s why we always ask when the leak shows up: during wind-driven rain, after heavy snow or only in a spring thaw.
Ontario weather finds every weak spot. Wind off Lake Ontario lifts shingle tabs that never sealed. Freeze-thaw cycles open cracks in old caulking and rubber vent collars. Ice dams push meltwater up under the shingles at the eaves. We repair with matching materials where we can, and if the roof is near the end of its life, we tell you plainly. A repair done right should be the last time you think about that spot.
Why James Roofing
Why our repairs hold up
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We trace the source
We check the roof, the flashing and the attic together so the fix lands where the water is actually getting in.
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Metal, not roofing tar
Failed flashing gets replaced or reset, not buried under roofing cement that cracks after one winter.
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Closest available shingle match
We look for the nearest match in colour and profile so the repair blends with the rest of the roof.
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Honest repair advice
If patching would be throwing money away, we'll say so and show you the photos to back it up.
Google Reviews
What our customers say
5.0
- 5 out of 5 stars
I am beyond happy with the work that James Roofing did at my rental property. I had water damage from an incompatible roofing system that was put on by the previous company. From the beginning of my project, James was happy to answer any questions I had about proposed solutions and always made sure I understood all options available. The job was done when he said it would be, and on time. The crew was very polite with my tenants and cleaned up 100% after their work was done. I will be calling James Roofing again when my main roof needs replaced.
- 5 out of 5 stars
They are a great company!! The workers were pleasant and got the job done in a timely manner. Prices are reasonable as well. Will definitely recommend!!
- 5 out of 5 stars
I am very pleased to give the highest regard to this company. Not only were they efficient but also made me feel included with the process. Very easy to communicate with, good listeners and very knowledgeable. Thumbs up!!
- 5 out of 5 stars
Honestly great experience from start to finish. I got the run around from a few other roofers before finding James Roofing. He was prompt in returning my phone calls, worked me in a few days earlier than originally planned and fixed the leak in my roof immediately and for a fair price. Would highly recommend to anybody looking for good, honest work
- 5 out of 5 stars
Janes was able to fix holes in my roof with short notice. Solid job!
- 5 out of 5 stars
James Roofing did a fantastic job making this 106 year home look so much better. The crew were fantastic and cleaned up well after the job was complete. Very polite and James was fantastic to deal with. Very professional.
- 5 out of 5 stars
Great and honest work. They installed eavestrough and down pipes for me. Very reasonably priced and professional job well done.
How It Works
From first call to a dry ceiling
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Tell us the pattern
Let us know where the leak shows up and when, such as only in wind-driven rain or only during spring melt.
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Roof and attic check
We inspect the roof surface, the flashing and the underside of the deck to find the entry point.
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Written repair quote
You get a clear scope and photos of the problem before any work starts.
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Repair and cleanup
We make the repair with proper materials, clean up and send you photos of the finished work.
The repairs we make most often
Flashing failures
Most leaks we chase come from flashing, not shingles. Step flashing along a dormer wall, counter-flashing on a brick chimney and the metal around skylights all move with temperature swings. Over time nails back out, sealant dries and water slips behind. We remove the failed section, install new metal lapped the right way and use sealant only where it belongs. Chimney counter-flashing gets cut into the mortar joint, not glued to the face of the brick.
Wind and storm damage
Strong gusts catch shingle tabs that never bonded, usually on the windward slope or along the ridge and rakes. Once a few tabs go, the next storm peels more. We replace the missing shingles, hand-seal the tabs around them and check the ridge cap. For an insurance claim, we photograph the damage before and after.
Vent boots and penetrations
The rubber collar around a plumbing vent eventually cracks from sun and cold, and water runs straight down the pipe. It’s a small, common repair that saves a lot of drywall. We also reseal or replace exhaust vents, old satellite mounts and anything else that pokes through the roof. We check every boot while we’re up there, since they tend to fail around the same time.
Ice dam leaks
When heat from the house melts snow on the roof, the water runs down and refreezes at the cold eave, building a ridge of ice. Water backs up behind it and works under the shingles. We repair the damage, add ice-and-water shield where the eaves lack it, and look at insulation and ventilation so it stops happening. Roof rakes and salt pucks only buy time.
Questions
Roof Repair FAQs
Still unsure about something? Call us and talk to someone who actually works on roofs.
(289) 683-9727Can you repair a roof in winter?
Yes. Many repairs can be done in cold weather, and some leaks can't wait for spring. We make a permanent repair when conditions allow and a proper temporary one when they don't, and we tell you which is which.
Is it worth repairing an older roof?
If the rest of the roof has good life left, a targeted repair is usually the smart move. If the shingles are brittle and worn everywhere, repeated repairs add up fast. We'll give you an honest assessment with photos.
Will the new shingles match my roof?
We source the closest match available in colour and style. Older or discontinued shingles may not match exactly, and weathering shifts colour over time, so we'll show you options before we start.
Can you help with an insurance claim for storm damage?
We document the damage with photos and a written description of what we found and what the repair involves. Your insurer makes the coverage decision, but clear documentation makes the claim easier to process.
Why does my roof only leak in certain weather?
Leaks that appear only in wind-driven rain often point to flashing or lifted shingles on one side of the house. Leaks that appear only during a thaw usually mean ice dams. Telling us when it happens helps us find the source faster.
Service Areas
Roof Repair across Southern Ontario
Our crews cover Hamilton, Halton, Peel, Toronto and Niagara. Pick your city for local details.
- Hamilton
- Toronto
- Burlington
- Oakville
- Mississauga
- Stoney Creek
- Ancaster
- Grimsby
- St. Catharines
- Niagara Falls
- Welland
- Milton
Not on the list? We cover the communities in between too. Call (289) 683-9727 to check.
More Services
More ways we protect your property
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Roof Replacement
Full tear-off to the deck, new ice-and-water shield, underlayment and architectural shingles, installed to handle Ontario winters and summer heat.
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Flat Roofing
Modified bitumen, TPO and EPDM systems for garages, additions, rowhouses and commercial roofs, with drainage built in so water doesn't sit.
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Commercial Roofing
Low-slope roof installation, repair and maintenance programs for plazas, offices, industrial units and multi-unit residential buildings.
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Roof Inspections
Pre-purchase, post-storm, insurance and annual roof inspections, with photos and a plain-language report on what needs attention.
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Eavestrough, Soffit and Fascia
Seamless aluminum eavestrough, downspouts, soffit and fascia, installed with the right size and slope to move water away from your foundation.
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Gutter Guards
Gutter guards that keep leaves, maple keys and pine needles out of your eavestrough, so it drains in summer storms and clogs less in winter.
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Siding
Vinyl, fibre cement, aluminum and steel siding installed over a proper weather barrier, with trim and flashing done right at every window.
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Attic Insulation and Ventilation
Blown-in attic insulation and balanced ventilation that cut heat loss, prevent ice dams and keep condensation and mould out of your attic.
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Snow Removal
Seasonal snow removal for driveways, walkways and commercial lots, plus salting and roof snow and ice dam removal from the crew that knows your roof.
Explore snow removal
Got a leak? Let's find it.
Call (289) 683-9727 or request a free roof repair estimate and we'll track the problem down.