Emergency Roof Repair in Thornhill
Active leak in Thornhill? We dispatch around the clock and arrive with containment materials and the tools to find the cause on the same visit.

Emergency Roof Repair in Thornhill, what we fix.
Flooding response
Storm & wind damage
Fire-related roof & building repairs
Insurance claim support
Temporary protection & tarping
Structural drying coordination
Why you should call us first.
60-min response
Contain then diagnose
Document before covering
One call, both phases
24/7 availability
Insurance claim support
60-min response
We maintain dispatch capability across the GTA. Active leaks get priority dispatch, around the clock.
Contain then diagnose
We contain the water intrusion first, then diagnose the full failure mode. Speed and accuracy, not just one or the other.
Document before covering
We photograph and document all storm damage before applying temporary protection. That documentation matters for insurance claims.
One call, both phases
Our vehicles are stocked for both temporary containment and permanent repair. Many emergency calls end with a permanent fix on the same visit.
24/7 availability
We answer the phone at 2am. Water doesn't wait for business hours.
Insurance claim support
Every emergency call includes a written damage report formatted for insurance carrier submission.
“We answer at 2am. When water is coming through a ceiling, the time between the call and the first tarp is the entire job.”
“We answer at 2am. When water is coming through a ceiling, the time between the call and the first tarp is the entire job.”
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.
Blue 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.
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.
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.
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.
Emergency Roof Repair questions for Thornhill.
Typically within 60 minutes, and often faster, because Thornhill is compact and close to our shop. What slows a call here is access rather than distance, particularly on the narrower older streets around Thornhill Village where staging space is limited.
We stop the water with secured tarping or a temporary membrane patch, photograph the failure before covering it, and trace the entry point. You are left with the intrusion contained and a written account of what failed, which becomes the basis for the permanent repair quote and any insurance claim.
Yes, including weekends and holidays. Most of the serious damage from an overnight leak happens before morning, so answering at two in the morning is less about the speed of the repair and more about limiting what has to be repaired at all.
In winter that is nearly always an ice dam releasing. Ice built at the eave over several cold days, backed meltwater under the shingles, and let go when the temperature moved. Tarping achieves nothing because the water is already inside the assembly, so the work is clearing a channel through the dam and protecting the interior below.
Yes, and it is one of our most common Thornhill calls. Containment on brittle membrane is not a tarp; it is a self adhered temporary patch that will bond in the conditions on the night, applied in a way that does not create a new low spot for water to collect in.
Yes. We photograph before covering anything and provide a written report formatted for submission: failure description, probable cause, and recommended repair. Insurers separate sudden damage from gradual wear, and on a thirty year old roof that distinction decides the claim.
When water is actively entering a building the order does not vary. Contain first, because every minute it runs costs more insulation and drywall. Photograph second, before any covering goes on, because that record is what an insurer decides the claim on and it cannot be recreated afterwards. Diagnose third.
Thornhill's emergencies skew toward two causes. In any season with sustained rain it is the flat section over a garage or addition, where a brittle membrane finally opens at a seam. In winter it is ice damming at the eaves of houses whose soffit intake was buried by a later insulation upgrade.
The Flat Section Emergency
The call that is particular to Thornhill comes from a flat roof over a garage or a rear addition, usually during sustained rain rather than during a storm. A membrane that has been brittle for years opens at a seam and moves real volume into the ceiling below, which on an addition is frequently a finished living space.
Containment there is a different job from tarping a slope. The surface is flat, often ponded, and a tarp simply floats. We carry self adhered temporary membrane for exactly this, applied so it does not create a new low spot, and we check the drainage path before leaving rather than only the tear.
Containment First, Quote Later
The emergency visit and the permanent repair are deliberately separate steps. On the night the job is to stop the water, record what failed, and leave the building secure. We do not quote a permanent scope while water is coming through a ceiling, partly because nobody decides well in that state and partly because the full extent is often not visible until things dry out.
What you have before we leave is the containment in place, photographs taken before it went on, and a plain account of what we found. If it will hold safely for several weeks while you get other quotes, we say that too.
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.
