Your roof is an asset. We manage it like one.
Commercial flat roofing for property managers, building owners, and condo boards across Toronto, system selection, occupied-building staging, and written condition reports.
Commercial roofing, managed like the capital asset it is.
For property managers, building owners, and condo boards, from system selection through maintenance to the report your lender asks for.
System Selection & Replacement
Occupied-Building Staging
Written Condition Reports
Preventive Maintenance Programs
Capital Planning & Budgeting
24/7 Emergency Response
System Selection & Replacement
EPDM · TPO · Mod-Bit
The right membrane depends on the deck, the equipment load, and how long you plan to hold the building. We specify, justify in writing, and install.
Occupied-Building Staging
Tenants stay open
Staging plans, safety plans, and work sequencing designed around operating tenants, so storefronts stay open and floors stay occupied.
Written Condition Reports
Lenders & insurers accept them
Condition assessments with remaining useful life estimates, the documentation underwriters, lenders, and reserve fund studies actually require.
Preventive Maintenance Programs
Planned, not reactive
Semi-annual inspections, drain clearing, and seam checks that catch small failures before they become tenant claims and emergency invoices.
Capital Planning & Budgeting
Know the number early
Multi-year roof asset plans, what needs attention now, what can wait, and what replacement will cost, so boards and owners budget instead of react.
24/7 Emergency Response
60-minute dispatch
An active leak over inventory or tenants is a business problem, not just a roof problem. We dispatch within 60 minutes, day or night.
Managing a commercial roof in the GTA? Get a written condition report before the next lease, loan, or leak.
Why GTA property managers keep one roofer on file.
All three membrane systems
Occupied-building staging
Reports lenders accept
Maintenance over emergencies
24/7 commercial response
All three membrane systems
We specify the system your building actually needs, not the one we happen to stock. Every recommendation is justified in writing.
Occupied-building staging
Staging plans, safety plans, and sequencing built around your tenants, retail stays open, offices stay working.
Reports lenders accept
Written condition reports with remaining useful life estimates, the format insurers, lenders, and reserve fund studies require.
Maintenance over emergencies
Semi-annual inspection programs that catch seam and drain failures for hundreds of dollars instead of tens of thousands.
24/7 commercial response
An active leak over inventory or tenants gets a 60-minute dispatch target, 2am or 2pm, we answer.
“A commercial roof is a 25-year capital asset. Most owners manage it like a series of emergencies. We change that.”
“A commercial roof is a 25-year capital asset. Most owners manage it like a series of emergencies. We change that.”
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.
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.
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.
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.
Commercial roofing questions.
A new commercial flat roof system in Toronto typically runs $8-$14 per square foot installed, depending on membrane type, insulation upgrades, deck condition, and access. Overlays over a sound existing membrane sit at the lower end; full tear-offs with wet insulation removal at the upper end. We provide a written, itemized scope before any work begins.
TPO has become the default for new GTA commercial installs: heat-welded seams outlast adhesive laps, and the white surface cuts summer cooling loads. EPDM remains the better choice where rooftop chemical exposure or heavy foot traffic favours its rubber durability. The honest answer depends on your deck, your equipment, and your hold period, we specify system by system, not brand by habit.
Properly installed and maintained, 20-30 years. EPDM leads at 25-30 years, TPO runs 20-25, and modified bitumen 15-20. The variable that matters most is maintenance: a membrane with cleared drains and sealed penetrations reaches its design life; a neglected one fails a decade early. Every roof we install carries a written warranty.
Often, yes. Ontario Building Code permits one overlay if the existing insulation is dry and the deck is sound, we verify both with core samples and thermal scanning before recommending it. An overlay saves tear-off and disposal costs and shortens the disruption to your tenants. If the insulation is wet, an overlay just buries the problem, and we will tell you so.
That is most of our commercial work. We build a staging and safety plan around your operations, material hoisting away from entrances, odour and noise scheduling around business hours where needed, and daily communication with your property manager. Retail stays open, offices keep working.
What Property Managers Ask About Commercial Roofing.
The most-searched questions, answered by 25-year GTA commercial roofing specialists.
A new commercial flat roof system in Toronto typically runs $8-$14 per square foot installed, depending on membrane type, insulation upgrades, deck condition, and access. Overlays over a sound existing membrane sit at the lower end; full tear-offs with wet insulation removal at the upper end. We provide a written, itemized scope before any work begins.
Start with a written condition report that estimates remaining useful life, then plan replacement cost at $8-$14 per square foot two to three years ahead of that date. Boards and owners who budget from a documented assessment avoid the two expensive outcomes: replacing early out of uncertainty, or waiting until an emergency forces a rushed decision at a rushed price.
Yes, typically 20-30% cheaper, but only when the existing insulation is dry and the deck is sound, verified by core sampling and thermal scanning, not assumed. An overlay on wet insulation buries the problem instead of solving it. We tell you honestly which category your roof falls into before recommending either.
TPO has become the default for new GTA commercial installs: heat-welded seams outlast adhesive laps, and the white surface cuts summer cooling loads. EPDM remains the better choice where rooftop chemical exposure or heavy foot traffic favours its rubber durability. The honest answer depends on your deck, your equipment, and your hold period, we specify system by system, not brand by habit.
- How much does commercial roofing cost per square foot in Toronto?
- A new commercial flat roof system in Toronto typically runs $8-$14 per square foot installed, depending on membrane type, insulation upgrades, deck condition, and access. Overlays over a sound existing membrane sit at the lower end; full tear-offs with wet insulation removal at the upper end. We provide a written, itemized scope before any work begins.
- How do I budget for a commercial roof replacement?
- Start with a written condition report that estimates remaining useful life, then plan replacement cost at $8-$14 per square foot two to three years ahead of that date. Boards and owners who budget from a documented assessment avoid the two expensive outcomes: replacing early out of uncertainty, or waiting until an emergency forces a rushed decision at a rushed price.
- Is a roof overlay cheaper than a full tear-off?
- Yes, typically 20-30% cheaper, but only when the existing insulation is dry and the deck is sound, verified by core sampling and thermal scanning, not assumed. An overlay on wet insulation buries the problem instead of solving it. We tell you honestly which category your roof falls into before recommending either.
- Which is better for a commercial building. TPO or EPDM?
- TPO has become the default for new GTA commercial installs: heat-welded seams outlast adhesive laps, and the white surface cuts summer cooling loads. EPDM remains the better choice where rooftop chemical exposure or heavy foot traffic favours its rubber durability. The honest answer depends on your deck, your equipment, and your hold period, we specify system by system, not brand by habit.
- How long does a commercial roof membrane last?
- Properly installed and maintained, 20-30 years. EPDM leads at 25-30 years, TPO runs 20-25, and modified bitumen 15-20. The variable that matters most is maintenance: a membrane with cleared drains and sealed penetrations reaches its design life; a neglected one fails a decade early. Every roof we install carries a written warranty.
- Can you install a new roof over the existing membrane?
- Often, yes. Ontario Building Code permits one overlay if the existing insulation is dry and the deck is sound, we verify both with core samples and thermal scanning before recommending it. An overlay saves tear-off and disposal costs and shortens the disruption to your tenants. If the insulation is wet, an overlay just buries the problem, and we will tell you so.
- What roof membrane is best for a large commercial building in Toronto?
- For most large flat commercial roofs, TPO's heat-welded seams and reflective surface make it our default recommendation, it holds up well against Toronto's freeze-thaw cycling and reduces rooftop cooling load. Buildings with heavy foot traffic to mechanical units or rooftop chemical exposure sometimes do better on EPDM's rubber durability instead.
- Do you work on occupied commercial buildings?
- That is most of our commercial work. We build a staging and safety plan around your operations, material hoisting away from entrances, odour and noise scheduling around business hours where needed, and daily communication with your property manager. Retail stays open, offices keep working.
- How do you keep tenants safe and operational during a reroof?
- Sequencing in zones so the building stays watertight at the end of every workday, craning materials in measured daily loads instead of stockpiling overhead, and scheduling noisy or odour-generating work around tenant hours where the lease requires it. We coordinate rooftop HVAC shutdowns in short, pre-scheduled windows with building management rather than surprising anyone.
- Will construction noise disrupt our retail tenants?
- We schedule the loudest phases, tear-off and mechanical fastening, around your tenants' posted hours wherever the work sequence allows, and we communicate the daily plan to your property manager in advance so nothing arrives as a surprise. Heat-welding and adhesive work are quieter and can often proceed during business hours without issue.
- What does a commercial roof maintenance program include?
- Semi-annual inspections, drain and scupper clearing, seam and flashing checks, and a written condition report after each visit that feeds your long-term capital plan. Catching a lifted seam or a clogged drain during a scheduled visit costs a fraction of the tenant claim that follows if it is left until it fails.
- How often should a commercial roof be inspected?
- Twice a year at minimum, once in spring to assess winter damage and clear drains before heavy rainfall season, once in fall before freeze-up to confirm every seam and penetration is sealed. Buildings with rooftop HVAC should add an inspection after any major equipment service, since mechanical crews frequently damage membranes without reporting it.
- Who is responsible for roof maintenance in a commercial lease?
- Typically the landlord for the base building envelope, though triple-net leases sometimes assign roof maintenance to the tenant. Either way, a written inspection report at lease transitions protects both parties, we provide documentation formatted for that purpose.
- Can commercial roofing work be done in a Toronto winter?
- Yes, for both emergency repair and, with cold-weather-rated materials and torch equipment, scheduled work down to about -10°C. Full membrane replacement is easier to sequence in warmer months, but an active leak on a commercial building does not wait for spring, and we do not make it wait either.
- How does snow load affect a commercial flat roof?
- Properly designed commercial roofs are engineered for Ontario Building Code snow loads and do not need routine clearing. The exception is a roof with pre-existing drainage problems, heavy snow on a blocked drain can create real structural concern, which is why winter drain checks are part of every maintenance program we run.
More ways Blue Knight can help.
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.