01Flat, shingle, metal. Commercial and residential.
Roof Repair
- Roof leak repairs
- Emergency tarping
- Storm damage repair
- Shingle repairs & replacement
- Flat roof repairs (EPDM, TPO, Mod-Bit)
- Flashing repairs
- Drain issues
- Rooftop troubleshooting
Serving Markham
Roofing & Waterproofing in Markham
Markham holds nineteenth century village stock and 2010s subdivision on the same municipal map. Those are different buildings with different failures, and we work both.
25+Years on GTA roofs
60 minEmergency response
Licensed& fully insured
York RegionRegion served
Our Services in Markham
What we do in Markham.
Four core services, each with bespoke local knowledge applied to Markham's specific building types and conditions.
01
02Below grade. Balcony. Terrace. Parking deck.
Basement Waterproofing
- Basement leaks
- Below-grade waterproofing
- Sump pump installation
- Balcony leaks
- Terrace leaks
- Underground parking waterproofing
- Crack injections
- Concrete slab leaks
0324 hours a day. On site within 60 minutes across the GTA.
Emergency Roof Repair
- Flooding response
- Storm & wind damage
- Fire-related roof & building repairs
- Insurance claim support
- Temporary protection & tarping
- Structural drying coordination
- Emergency rebuilds
04Comprehensive reports a lender will accept.
Roof Inspection
- Residential inspections
- Commercial roof assessments
- Industrial inspections
- Drone inspections
- Thermal imaging
- Moisture detection
- Forensic leak investigations
- Insurance reports
01Flat, shingle, metal. Commercial and residential.
Roof Repair
02Below grade. Balcony. Terrace. Parking deck.
Basement Waterproofing
0324 hours a day. On site within 60 minutes across the GTA.
Emergency Roof Repair
04Comprehensive reports a lender will accept.
Roof Inspection
Why Blue Knight
Why Markham property owners choose us.
01Emergency
60-Min Response
Active leaks anywhere in the GTA get same-day priority dispatch. We answer at 2am, including weekends and holidays.
02Coverage
Licensed & Insured
Complete liability coverage on every job. All work is documented and you are protected from start to finish.
03Transparency
Written Reports Every Time
Inspection reports, repair documentation, and scope estimates in writing before we touch anything.
04Experience
25+ Years on GTA Roofs
We've worked on tens of thousands of GTA buildings. We recognise failure patterns before they become emergencies.
05Diagnosis
Find the Cause First
We trace the actual failure mode before proposing a scope, and we quote what that scope requires rather than inventing urgency.
“A crew that only knows subdivision work will damage a Unionville heritage roof, and a heritage specialist will overcharge for a Cathedraltown reroof that needs nothing unusual. We run both kinds of work out of the same shop, which is the only reason we can answer for the whole city.”
01Emergency
60-Min Response
Active leaks anywhere in the GTA get same-day priority dispatch. We answer at 2am, including weekends and holidays.
02Coverage
Licensed & Insured
Complete liability coverage on every job. All work is documented and you are protected from start to finish.
03Transparency
Written Reports Every Time
Inspection reports, repair documentation, and scope estimates in writing before we touch anything.
04Experience
25+ Years on GTA Roofs
We've worked on tens of thousands of GTA buildings. We recognise failure patterns before they become emergencies.
05Diagnosis
Find the Cause First
We trace the actual failure mode before proposing a scope, and we quote what that scope requires rather than inventing urgency.
“A crew that only knows subdivision work will damage a Unionville heritage roof, and a heritage specialist will overcharge for a Cathedraltown reroof that needs nothing unusual. We run both kinds of work out of the same shop, which is the only reason we can answer for the whole city.”
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.
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 5I 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.
1 / 3
Rated 5 out of 5
Blue Knight was, by far, the best. Responsive, ethical, totally professional — and their crew went above and beyond at no extra charge.
Toronto, ON·Google
Rated 5 out of 5
They installed a full new roof in one day. The crew worked around the house without us hardly knowing they were there.
North York, ON·HomeStars
Rated 5 out of 5
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.
Toronto, ON·Google
Rated 5 out of 5
Luciano did not try to sell me a new roof. Appreciated the honesty — he showed up when he said he would.
Etobicoke, ON·Google
Rated 5 out of 5
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.
Scarborough, ON·Google
Rated 5 out of 5
Flat roof replacement on a commercial unit. Clean, fast, no surprises on the invoice. The crew left the site cleaner than they found it.
Mississauga, ON·GuildQuality
Rated 5 out of 5
Called after a storm damaged our roof. Someone was on site within hours, tarped everything, and had us fully repaired before the next rain.
Vaughan, ON·HomeStars
Rated 5 out of 5
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.
North York, ON·Google
Rated 5 out of 5
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.
Richmond Hill, ON·HomeStars
1 / 9
GTA Roofing Projects Since 1999
Featured Projects.
Where We Work
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Toronto
Greater Toronto Area
Extended Service Area
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Where We Work
Rooftops across the GTA.
From downtown Toronto to the 905 and beyond, one crew, one warranty, twenty-five years of GTA rooflines.
Toronto
Greater Toronto Area
Extended Service Area
Service availability may vary. Call (647) 383-8664 to confirm coverage for your area.
Areas Served
Neighbourhoods & areas we serve in Markham.
We work across all areas of Markham. If you don't see your neighbourhood listed, we almost certainly cover it.
Markham Village
Unionville
Milliken
Cornell
Cathedraltown
Berczy
German Mills
Buttonville
Victoria Square
Greensborough
FAQ
Markham roofing questions.
All of it, from Milliken and German Mills at the Toronto boundary north through Unionville and Markham Village to Victoria Square and Cathedraltown. Markham is large and the eastern edge past Cornell adds drive time, so we quote a realistic window when you book rather than a flat number for the whole city.
Yes, through the City of Markham building department at the Civic Centre on Highway 7. Structural roof work and foundation alterations need a permit; a like for like reroof generally does not. Heritage designated properties in Unionville and Old Markham Village carry an additional review for exterior alterations, and we confirm whether yours is affected before quoting.
Yes, and the constraint worth understanding early is material. Slate, cedar, and original metalwork vary by source in colour, thickness, and how they weather, so a repair patched with whatever is available reads as a scar from the street for the rest of the building's life. We name the material specifically in the estimate rather than describing a category.
Markham has been part of our York Region work for most of the twenty five years we have been operating. The repetition matters here more than in most municipalities, because the city was built in distinct waves and each wave fails on its own schedule. Knowing which decade a street belongs to tells us most of what to expect before anyone gets out of the truck.
In Depth
Where We Work in Markham
Markham divides usefully by age rather than by geography. The oldest fabric sits in two pockets, Old Markham Village and Unionville, both of them heritage sensitive and both of them containing buildings that predate every assumption a modern roofing crew brings to a job. Around them, Milliken and German Mills are postwar. Berczy, Cathedraltown, Cornell, and Greensborough are subdivision from the 1980s onward, laid out fast and largely uniform street by street.
That uniformity is genuinely useful. When one house on a Cathedraltown street fails a particular way, its neighbours are usually a season or two behind it, and we can tell an owner what to expect with more confidence here than in a city built piecemeal.
How We Work in Markham
We diagnose before we price. On a roof that means following the leak path from both sides until we can say precisely what failed. On a foundation it means finding where water is actually entering.
The written report that follows names what failed, why, and what fixing it properly involves. On a heritage property it also names the materials present by type, because that determines both what a future repair will cost and who is qualified to carry it out.
Nearby Service Areas
Other areas we serve near Markham.
About Markham
What we know about buildings in Markham.
Markham has a longer construction history than its reputation as a technology corridor suggests. Old Markham Village and Unionville carry nineteenth and early twentieth century residential and commercial buildings, some of them heritage designated. The postwar expansion added 1950s through 1970s housing around Milliken and German Mills. The 1980s through 2000s growth produced the bulk of the city in Berczy, Cathedraltown, and Cornell, and the current era is adding density along Highway 7.
Those eras fail differently and on different schedules. Heritage roofs in Unionville need matched material and somebody who will not put a modern asphalt patch on a nineteenth century roofline. The 1990s and 2000s subdivisions are reaching first replacement now, and the recurring problem there is attic ventilation that was marginal when built and was frequently made worse by a later insulation upgrade.
Below grade, most of Markham sits on soil that drains slowly, and the foundations poured through the subdivision booms received a sprayed damp proofing coating rather than waterproofing. That coating is reaching the end of its service life across whole neighbourhoods at once, which is why one street can produce several wet basements in the same spring.
A crew that only knows subdivision work will damage a Unionville heritage roof, and a heritage specialist will overcharge for a Cathedraltown reroof that needs nothing unusual. We run both kinds of work out of the same shop, which is the only reason we can answer for the whole city.
About Markham
What we know about buildings in Markham.
Markham has a longer construction history than its reputation as a technology corridor suggests. Old Markham Village and Unionville carry nineteenth and early twentieth century residential and commercial buildings, some of them heritage designated. The postwar expansion added 1950s through 1970s housing around Milliken and German Mills. The 1980s through 2000s growth produced the bulk of the city in Berczy, Cathedraltown, and Cornell, and the current era is adding density along Highway 7.
Those eras fail differently and on different schedules. Heritage roofs in Unionville need matched material and somebody who will not put a modern asphalt patch on a nineteenth century roofline. The 1990s and 2000s subdivisions are reaching first replacement now, and the recurring problem there is attic ventilation that was marginal when built and was frequently made worse by a later insulation upgrade.
Below grade, most of Markham sits on soil that drains slowly, and the foundations poured through the subdivision booms received a sprayed damp proofing coating rather than waterproofing. That coating is reaching the end of its service life across whole neighbourhoods at once, which is why one street can produce several wet basements in the same spring.
"A crew that only knows subdivision work will damage a Unionville heritage roof, and a heritage specialist will overcharge for a Cathedraltown reroof that needs nothing unusual. We run both kinds of work out of the same shop, which is the only reason we can answer for the whole city."
Blue Knight, Markham
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.