Roof Repair in North York
From post-war bungalows in Willowdale to mid-rise buildings along Yonge and Sheppard, we trace and fix roof leaks across all of North York's building types.
Roof Repair in North York, what we fix.
Roof leak repairs
Emergency tarping
Storm damage repair
Shingle repairs & replacement
Flat roof repairs (EPDM, TPO, Mod-Bit)
Flashing repairs
Why Blue Knight finds it when others don't.
We trace first
Written reports
25+ years experience
No upsells
60-min emergency
Permanent repairs
We trace first
Every job starts with a full trace from interior stain back to the roof. We find the source before touching anything.
Written reports
You receive a written diagnostic report with photos, suitable for insurance, lenders, and property management files.
25+ years experience
Two and a half decades on GTA roofs means we've seen every failure mode across every building type in the region.
No upsells
We don't sell replacements when repairs are appropriate. Our invoice reflects what the building actually needs.
60-min emergency
Active leaks get same-day priority dispatch, around the clock, including nights and weekends.
Permanent repairs
We use manufacturer-matched materials and test the repair before we leave. No waiting for the next rain.
“We trace the leak from the stain back to the source. That's how leaks get fixed permanently.”
“We trace the leak from the stain back to the source. That's how leaks get fixed permanently.”
Rated 5 out of 5They installed a full new roof in one day. The crew worked around the house without us hardly knowing they were there.
Rated 5 out of 5Had a slow basement leak for years. Every other company just caulked it. Blue Knight found the actual source and did a proper waterproofing job. No issues since.
Rated 5 out of 5Blue Knight was, by far, the best. Responsive, ethical, totally professional — and their crew went above and beyond at no extra charge.
They installed a full new roof in one day. The crew worked around the house without us hardly knowing they were there.
Had a slow basement leak for years. Every other company just caulked it. Blue Knight found the actual source and did a proper waterproofing job. No issues since.
Blue Knight was, by far, the best. Responsive, ethical, totally professional — and their crew went above and beyond at no extra charge.
I emailed at 4 a.m. and spoke with someone that same day. Estimate and completed work all within one day. Pricing was fair, work was excellent.
Luciano did not try to sell me a new roof. Appreciated the honesty — he showed up when he said he would.
We had a leak diagnosed by two other contractors who could not find the source. Blue Knight found it on the first visit and fixed it the same week.
Flat roof replacement on a commercial unit. Clean, fast, no surprises on the invoice. The crew left the site cleaner than they found it.
Called after a storm damaged our roof. Someone was on site within hours, tarped everything, and had us fully repaired before the next rain.
Our neighbours recommended them for a valley repair. Small job, but they treated it like it mattered — showed up on time, matched the shingles perfectly, and charged exactly what they quoted.
Featured Projects.
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Roof Repair questions for North York.
Yes. We work on modified bitumen, EPDM, and TPO systems on residential and commercial mid-rises throughout North York. We isolate the leak source, perform the repair, and test before leaving.
Usually it's a combination of ventilation and attic insulation. Ice dams form when heat escapes into the attic, melts snow, and that water refreezes at the cold eave. We assess the full system and recommend the right fix, not just a patchwork on the affected shingles.
Most localized repairs, a failed flashing, a cracked boot, a membrane split, are complete in half a day. We test the repair before leaving. You don't wait for the next rainfall to find out if it worked.
We work with property managers throughout North York, including scheduled maintenance contracts. We provide written reports and photo documentation suitable for property management files.
Yes, and we check the deck condition before laying new material. On post-war homes with original board sheathing, we replace deteriorated sections rather than covering over them.
We trace from the interior stain back to the roof surface, checking valley flashings, pipe boots, and attic ventilation before touching the shingles. Wartime bungalows often have 1×6 board decks under the shingles, and we check those for rot along the way.
On the modified bitumen, EPDM, and TPO systems common on Yonge-Sheppard mid-rises, a targeted membrane patch or re-sealed penetration typically runs $500-$2,500. A larger lap-seam failure or partial section replacement is priced after we've isolated the extent of the damage.
Sudden storm damage, wind-lifted shingles, a punctured membrane from wind-driven rain off Lake Ontario, is generally covered. Age-related wear is not. We provide dated photo documentation of the failure so your adjuster can see which category it falls into.
Shingle replacement on a Bathurst Manor or Newtonbrook bungalow generally runs $8,000-$15,000. Flat-roof membrane replacement on a Yonge-Sheppard mid-rise runs $15,000-$40,000 depending on system and roof area. We give a firm number after inspection.
Asphalt shingle roofs on post-war bungalows last about 20-25 years, many homes between Lawrence and Sheppard are already on their second or third roof. Modified bitumen and EPDM membranes on mid-rises typically need replacement or recover at 15-20 years.
North York's residential stock presents two distinct roof-repair scenarios. In older neighbourhoods like Bathurst Manor and Newtonbrook, the challenge is 1950s-era low-pitch rooflines with original flashings, poor attic ventilation, and ice damming. In the highrise corridors, it's membrane systems aging past their warranted lifespan with failed lap seams and deteriorated penetration flashings.
We don't start by replacing. We start by diagnosing. Our process is to trace the leak path from the interior stain back to the roof surface, then isolate the exact failure mode before picking up a tool. That approach is what separates us from contractors who patch without finding the source.
Roof Repair Across North York's Building Types
North York is not a uniform neighbourhood. Willowdale and Newtonbrook have dense post-war residential. The Yonge-Sheppard corridor has 1970s-era highrise. Flemingdon Park has institutional and social housing stock from the 1960s. Each building type has its own roofing system and its own failure patterns.
We've worked on all of them. Our crews are experienced on residential shingle, flat-roof membrane, and commercial systems. We bring the right materials and methods for each building, not a one-size approach.
Why a Written Diagnostic Matters for North York Properties
For property managers and owners of older North York buildings, a roof repair that isn't documented is a repair that didn't happen from a due-diligence standpoint. Our written diagnostic reports include photos, failure-mode analysis, materials used, and follow-up recommendations.
This documentation matters for insurance claims, building sales, and reserve fund planning. We provide it as standard practice, not as an add-on.
The Repair That North York Bungalows Actually Need
On the wartime and post-war housing between Lawrence and Sheppard, the shingles are usually the last thing wrong. What we find under them, over and over, is a 1×6 board deck with gaps that opened as the lumber dried, a second layer of shingles laid over the first in the 1990s without anyone assessing what was underneath, and soffit venting that was modest in 1955 and was then buried by a blown-in insulation upgrade sometime after 2005.
Those three conditions compound. A poorly vented attic runs warm, the deck sweats in winter, the fasteners holding two layers of shingles work loose in the softened board, and the roof starts shedding tabs in wind that should not have troubled it. Replacing the surface without addressing the venting buys a few years and repeats the failure. We report on the attic and the deck as part of any repair quote on a house of this era, because quoting the shingles alone would be quoting the wrong job.
Flat Roof Repair on the Yonge and Sheppard Corridor
The mid-rise and highrise stock along Yonge from Sheppard to Finch is almost entirely flat-roofed, and much of it is running on modified bitumen or early EPDM that has passed its warranted life. These roofs rarely fail in the field. They fail at the details: lap seams that have lost adhesion, drain sumps that have ponded long enough to soften the substrate, and pitch pockets around older mechanical penetrations that were topped up with sealant instead of rebuilt.
Diagnosis on a building like this is a different job from diagnosis on a house. Water entering at a parapet can appear three units away and two floors down, so the trace runs from the interior complaint back through the ceiling assembly before anyone gets on the roof. We do that work with the building occupied and we report in a format a property manager can put straight into a reserve fund file.
We also cover nearby cities.
Ready to schedule your estimate?
We come to you, assess the roof, and give you a written quote. You are not obliged to proceed. Most estimates completed same week.