FLAT ROOFING SPECIALISTS
Commercial Flat Roofing in Toronto and the GTA
Commercial and industrial flat roofing. Our own crews. Toronto and the GTA since 1977.
On a flat roof, the stain on the ceiling is almost never under the hole.
Water gets through the membrane at a single point, spreads sideways through wet insulation, and comes out wherever it finds a seam in the deck. That is why patching the visible spot so often fails, and why the bill grows every month the real breach goes unfound.
Crown Industrial Roofing has done commercial flat roofing in Toronto since 1977, and nothing else: repair, maintenance, waterproofing and full replacement on warehouses, plazas, condominiums, office buildings and industrial plants across the GTA. Fifty years in the same trade, in the same city.
We find the breach before we quote — sometimes with an infrared scan, sometimes with a core sample, never by guessing from the ground. We have inspected thousands of commercial roofs across Toronto, and most of the leaks we find could have been caught a year earlier for a fraction of what they ended up costing.
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4.8 Star
Rating
Trusted by GTA Businesses for Five Decades
There are a lot of roofing companies in Toronto, and telling them apart from a website is close to impossible. Most building owners end up choosing on price and learning the rest afterwards.
Crown Industrial Roofing has been operating here since 1977. Our story is fifty years of completed projects and clients who kept calling back.
What the record holds:
50 years on commercial and industrial buildings, flat roofing only
Warehouses, distribution centres, retail plazas, condominiums and office buildings
Licensed and fully insured: comprehensive general liability, safety-certified crews, WSIB covered
Manufacturer-backed warranties on materials, plus a workmanship warranty of up to 15 years carried directly by Crown Industrial Roofing
We are not a general contractor that takes roofing work on the side. Commercial flat roofing is the entire business. Our health and safety program is written for occupied, operating buildings, so your tenants keep working while we are on the roof.
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SERVICES WE PROVIDE
Commercial Roofing Services in Toronto
A commercial roof is not a single job. It is a cycle of inspection, maintenance, repair and eventual replacement that runs twenty to thirty years. Our services cover every stage of it for commercial and industrial buildings across Toronto and the GTA.
Small repairs left alone become large replacements. We trace a leak back to its source instead of patching the spot under the ceiling stain, and we fix it once. No patchwork, and no second visit for the same defect.
A roof reaches a point where repair is no longer worth the money, and we will tell you when yours has. Full membrane replacement in PVC single-ply, SBS mod-bit or built-up roofing, on a fixed schedule and a line-item budget, backed by a workmanship warranty of up to 15 years that we carry ourselves.
Most building owners call us after a ceiling has already stained. A scheduled commercial roof maintenance program moves that call forward: we find blocked drains, split seams and failed flashing while they are still cheap to fix. Property managers and facility teams get a written report after every visit.
Storms do not keep business hours. Neither do we. If your roof is actively leaking and you need a crew on site today, call. We respond to emergencies across Toronto and the surrounding region, 24/7.
Moisture trapped under a membrane is invisible from above. A thermal scan locates it without cutting the roof open, which is the difference between replacing a wet section and replacing an assembly that never needed touching.
Planning new rooftop work rather than repairing what is there? We also handle rooftop installations and services, and our spring and fall roof inspection is free.
Commercial Flat Roofing Systems We Work With
Choosing the right system for a commercial flat roof is among the biggest decisions a building owner makes. It drives lifespan, maintenance cost and energy performance for the next two to three decades. We replace flat and low-slope roofing in PVC single-ply, SBS modified bitumen and built-up systems — and we repair and service every major membrane on the market, including the TPO and EPDM membranes already sitting on thousands of GTA buildings.
SBS Modified Bitumen
A multi-layer system with a long record in Canadian commercial construction. SBS mod-bit holds up where a roof takes heavy foot traffic or carries complex penetrations, and it stays workable through hard winters. It is the system we specify most often on industrial facilities.
Built-Up Roofing (BUR)
The traditional multi-ply assembly, still in place on many older Toronto industrial buildings. We replace failing BUR roofs, and where the assembly underneath is sound we repair and recover them instead. B.U.R. replacement remains among our largest categories of work.
TPO & EPDM — Repair and Service
TPO and EPDM cover a great many GTA rooftops, and we service and repair both: seam failures, punctures, flashing and drainage work. We do not install them. When such a roof reaches the end of its life, we will walk you through the replacement systems we are prepared to stand behind.
Not sure which of these roofing systems suits your building? An inspection settles it, and the answer will come from your deck, your equipment and your budget rather than from a catalogue. You can also review the full range of flat roof installation and rooftop services we handle for commercial properties across the GTA.
Industrial Roofing Across the GTA
A roof on a Toronto manufacturing plant carries different loads from one on a retail plaza, and both differ again from a condominium. How we approach each:
Warehouses & Distribution Centres
Large-format roofing where a small drainage problem becomes an operational problem quickly. Ponding water over a loading bay, a blocked scupper, a failed seam above racked inventory. We know how these buildings are put together, and how to work around active operations so the facility keeps running.
Retail Plazas
Multiple tenants, multiple drainage points, and a property manager who needs to know what is happening and when. We work with landlords and management companies across the GTA on both emergency calls and planned maintenance, because consistency matters when you are carrying a dozen leases.
Office Buildings
An office roof is judged on how little anyone notices the work. We stage materials outside peak hours, keep hoisting clear of building entrances, and sequence odour-producing work around your tenants' schedules wherever the job allows.
Condominiums
Condo boards need documentation, guarantees and accountability. Our post-inspection reports are detailed enough for both board approval and reserve fund studies. We also handle building envelope caulking and sealing, so the roof and the wall assembly get addressed together instead of as two separate contracts.
Industrial Facilities
Chemical exhaust, heavy equipment, constant vibration, ventilation penetrations everywhere. Industrial roofing fails in ways no other building type produces. We have worked on manufacturing and processing facilities for decades, and the failure modes are familiar ones.
Roofing Services Across Toronto, Etobicoke and the GTA
Our roofing services cover the full city and the surrounding regions:
Toronto: North York, Etobicoke, Scarborough, East York, York and the downtown core
GTA: Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Pickering, Ajax and Hamilton
Toronto's climate works on a commercial roof in a predictable sequence: freeze-thaw cycles through winter, ice damming at the parapets, snow load into February, then heavy rain across spring and summer. That sequence is why inspection frequency and system selection matter more here than in milder markets. A specification that performs well in Vancouver can fail on a Toronto warehouse roof inside two winters.
Not sure whether we cover your area? Call and ask. We have almost certainly worked on a building near yours.
Our Roofing Process
Five steps, refined over fifty years of commercial roofing work. It is not a complicated process, and that is the point: you should know what happens next at every stage.
The Inspection — We get up on the roof. What is happening up there is rarely what is visible from the ground.
Assessment & Report — You get a written report covering membrane condition, drainage performance, moisture in the insulation and every problem area we identified, including thermal scans for flat roofs where trapped water is suspected. It ends in a clear recommendation, not a menu of options.
Transparent Quote — Line-item pricing. No vague estimates. You'll know exactly what you're paying for before anything gets signed.
Project Execution — Our own crews complete the work, never subcontractors. That keeps quality control, site safety and accountability with one company from start to finish.
Final Inspection & Warranty — We walk the finished roof with you before the job is closed. The material warranty and the workmanship warranty are both issued in writing that day.
What Drives Roofing Costs
This is the section most roofing sites skip. We will not give you a number without seeing your roof, but we can tell you exactly what that number gets built from.
We have quoted work across Toronto from single-leak repairs to multi-building industrial replacements, so what follows comes from experience on real jobs rather than a calculator.
There is no single figure, and anyone who quotes one over the phone has not seen your roof. Five things move it on a commercial flat roofing project in Toronto:
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Size — more square footage, more material, more labour. It is the largest single variable and the easiest to establish.
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Roofing system — PVC and SBS mod-bit cost more up front than a basic recover and generally last considerably longer. The cheapest system rarely wins across twenty years.
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Condition underneath — a wet deck or wet insulation adds scope. Core samples taken during the inspection establish that before the quote is written, rather than after the tear-off has started.
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Access — mechanical units, multiple levels, tight urban sites and active tenants all affect timeline and price.
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Repair against replacement — the biggest fork of the five, and the decision worth settling before any money is committed.
The inspection and the line-item quote are free. Book one and the figure you take to your board or your budget will be a real number rather than a range off the internet.
Why Choose Crown Industrial Roofing
There is no shortage of commercial roofing contractors in Toronto. Five things separate us.
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50 years of commercial-only experience. Crown Industrial Roofing has never offered residential roofing. Every recommendation we make comes from five decades of commercial and industrial buildings and nothing else.
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No subcontractors. Every crew on your roof is on our own payroll. That is what makes quality control and site safety enforceable rather than aspirational.
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A documented process. From first inspection to final sign-off you will know where things stand. No surprises, and no chasing us for a straight answer.
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Long-term client relationships. Much of our work comes from property managers and building owners who have been calling us for decades. That does not happen if the roofs do not hold up.
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Straight assessments. If your roof does not need replacing, we will say so. If it does, we will show you the evidence. We would rather keep a client for twenty years than oversell one job.
"After fifty years, our technicians find the cause of a leak rather than the nearest symptom. That comes down to the materials we specify, the care our crews take, and a team that has been doing this work a long time. We price competitively, and we carry the workmanship warranty ourselves rather than passing it to a third party."
— Joe Ferrier
President, Crown Industrial Roofing
Questions Building Owners Ask Us
How long does a flat roof last?
It depends on the system and on how well it has been maintained. Mod-bit and built-up roofing typically runs 15 to 25 years. PVC single-ply can reach 25 to 30. We have seen some last well beyond that, and others fail inside a decade because of poor installation or drains nobody ever cleared.
How often should a flat roof be inspected?
Twice a year is the standard: a spring and fall roof inspection. Add one after any significant storm, and call immediately if you are seeing interior water damage. Planned inspection is almost always cheaper than reactive repair.
Repair or replace — how do I know which one I need?
An inspection answers it. As a rough rule on a low-slope commercial roof: if less than 25% of the membrane is damaged and the insulation below is dry, repair usually makes sense. Past that threshold, replacement is normally the better long-term decision. We will tell you which way yours falls and show you the evidence behind it.
What does a commercial flat roof cost?
No per-square-foot figure covers every building, and any contractor quoting one sight unseen is guessing. Price is driven by size, the system going on, the condition of the deck and insulation underneath, roof access, and whether the old roof needs a full tear-off. A 2,000 sq ft repair and a 2,000 sq ft replacement on the same building are entirely different numbers. What we can do is inspect the roof and give you line-item pricing at no cost, so the figure you put in your budget is a real one.
How long does the work take, and will it disrupt my tenants?
Most commercial repairs are a one- or two-day job. A full replacement on a mid-size Toronto building typically runs one to three weeks depending on square footage, weather and access. We phase the work, keep the site secure, and schedule around your operating hours wherever the job allows. Occupied, operating buildings are the normal case for us rather than the exception.
What's covered by your warranty?
Two warranties, both in writing. The membrane manufacturer warrants the material. Crown Industrial Roofing warrants the workmanship, up to 15 years, carried by us rather than passed to a third party. You receive both documents at final inspection.
Can roofing work be done in winter?
Emergency repairs, yes. We work through Toronto winters and respond to active leaks year-round. Full replacements are a different question: most membranes have temperature limits for proper adhesion, so we will usually schedule a planned replacement for the shoulder seasons and stabilize the roof in the meantime.
What's the best roofing system for Toronto's climate?
Toronto winters are hard on membranes: freeze-thaw cycles, ice and snow load all take a toll. PVC single-ply performs well here because it stays flexible at low temperatures. SBS modified bitumen is the other strong performer, with a long local record behind it. We match the system to your building rather than to whatever we happen to have on the truck.
Do you work with property managers and condo boards?
Yes, constantly. We are set up for the documentation, reporting and communication that property management and condo board approvals require, including reports detailed enough for reserve fund studies.
Are you licensed and insured?
Yes. Crown Industrial Roofing is licensed, carries comprehensive general liability insurance and is WSIB covered, and our crews hold current safety certification. Certificates are available on request, and the material and workmanship warranty documents are issued at final inspection.
Do you handle residential roofs?
Not single-family homes, no. Our work is commercial and industrial: warehouses, distribution centres, retail plazas, office buildings, industrial facilities and condominium corporations. That focus has held since 1977, and it is the reason commercial flat roofing clients in Toronto tend to stay with us.
Get a Commercial Roofing Quote in Toronto
If you are unsure about the condition of your roof, have it looked at before the weather forces the question. Whatever the building needs, from a leak repair or a maintenance program to waterproofing or a full commercial roof replacement, our licensed and insured crews will inspect it, document it and give you a line-item quote.
No obligation, and no hard sell. An honest assessment from a contractor Toronto building owners have trusted for 50 years.
Crown Industrial Roofing — commercial flat roofing specialists in Toronto and the GTA since 1977.