Choosing a commercial flat roofing contractor in Toronto is a harder decision than most property managers expect, and most of the lists available online don’t make it easier.
We’ve seen the “top 10 roofing companies” roundups and they tend to blend residential shingle installers with commercial flat roof specialists. This isn’t useful if you’re managing a warehouse, a retail plaza, or an industrial facility. The contractor who reshingles a detached home in Etobicoke isn’t the same contractor who should be replacing a 60,000 square foot built-up roof in Brampton.
This list is different in scope. Every contractor below is a commercial or industrial flat roofing specialist actively working in Toronto and the Greater Toronto Area. We’ve included companies that work across BUR, modified bitumen, EPDM, TPO, and PVC systems, with a preference for firms that have multi-decade track records in this specific trade.
And yes. We put our own company, Videl Roofing, at the top of the table because this is our post and we believe we belong on it, but the remaining nine contractors are listed alphabetically rather than ranked. Any honest comparison of commercial roofing contractors depends on the specific building, system, and scope involved, and a ranked order would suggest a level of head-to-head benchmarking that no public list can fairly claim.
The goal here is to give you a useful starting point. What follows is the comparison table, short profiles of each contractor, and a guide to the questions that actually separate a strong commercial roofer from a costly mistake.
Commercial Roofing Company Comparison table
| Company | Specialty | Years in Business | Service Area |
|---|---|---|---|
 | Commercial & industrial flat roofing, 4-ply BUR, preventative roof maintenance, drone roof inspections | 28+ | Toronto Brampton Markham Mississauga North York Niagara Scarborough Richmond Hill Vaughan |
| Elite Roofing and Contractors Ltd. | Commercial & industrial flat roofing, new construction | 40+ | Toronto & GTA |
| Nusite Group | EPDM rubber membrane specialists, commercial flat | 35+ | Toronto & Southern Ontario |
| AccuSeal Roofing 1991 Ltd. | Flat roof replacement for commercial & industrial properties | 35+ | Toronto, GTA, Durham Region |
| Crown Industrial Roofing | Commercial flat roofing & waterproofing | 20+ | Toronto & GTA |
| Province Wide Commercial Roofing (PWCR) | Commercial & industrial flat, metal, cladding | 15+ | Toronto & GTA |
| NorthCan Roofing | Commercial & industrial flat roofing, full replacements | 20+ | Toronto HQ, GTA-wide |
| Guycan Ltd. | Commercial flat roof inspection, repair, replacement, solar integration | 30+ | Toronto & GTA |
| Dominion Roofing | Commercial & residential, long Toronto heritage | 100+ | Toronto & GTA |
| Flat Roofers | Duro-Last single-ply, retrofits, coatings | 25+ | Toronto & GTA |
What to Look for in a Commercial Flat Roofing Company?
The difference between a good commercial roofer and an expensive mistake usually comes down to a few questions most property managers forget to ask. Here’s what matters.
Do they only do flat roofs, or is flat a side business?
A contractor who installs shingles four days a week and shows up to your industrial BUR job on a Friday is not a flat roof specialist. Ask what percentage of their work is commercial and industrial flat roofing. If it’s not most of it, keep looking.
Are they trained on the specific system you have?
BUR, EPDM, TPO, PVC, and modified bitumen all fail differently and repair differently. A contractor who’s excellent at EPDM may not be the right call for a 4-ply BUR replacement. Ask for recent project references on your exact system.
What does their maintenance program actually include?
Anyone can sell a new roof. Fewer contractors sell a real maintenance program with twice-yearly inspections, documented condition reports, drain and penetration checks, and a written record you can hand to an insurer or a future buyer. A maintenance-first contractor extends a roof’s life by 5 to 10 years. A replacement-first contractor sells you a new roof every 15.
How fast do they actually respond?
“24/7 emergency response” is on every website. What matters is the response time in writing, and whether the contractor has the crews and equipment to honour it across the GTA. A leak on a Tuesday afternoon at a tenant-occupied plaza in Scarborough is not the same problem 12 hours later.
What’s their insurance and safety record?
For commercial and industrial work, $2 million in liability is the floor. While $5 million is a better benchmark for larger buildings and property management portfolios. Ask for a certificate of insurance, WSIB clearance, and their recent safety record before you sign anything.
The Best Commercial Flat Roofing Contractors in Toronto and GTA
Videl Roofing Inc.
Location: Mississauga and St. Catharines
Specialty: Commercial and industrial flat roofing, four-ply BUR, Proactive Roof Maintenance Programs, drone roof inspection
Years in business: 28+ (founded 1998)
Videl Roofing is a family-owned commercial and industrial flat roofing contractor serving the GTA, Niagara, Hamilton, Halton, and Peel from offices in Mississauga and St. Catharines. Our focus is exclusively on commercial and industrial buildings, and our primary recommended system is four-ply built-up roofing engineered for Ontario’s freeze-thaw climate and heavy-traffic rooftops. We also install and maintain modified bitumen, EPDM, and TPO systems where those are the right fit for the building.
Beyond replacement, a significant portion of our work involves long-term roof maintenance. Our Proactive Roof Maintenance Program (PRMP) is designed to extend the useful life of a commercial flat roof by five to ten years through scheduled inspections, documented condition reports, and early intervention on minor issues. We also offer in-house drone roof inspection, which allows us to document roof condition efficiently across larger portfolios and catch problems that are difficult to see from the surface.
Highlights
- 28+ years serving commercial and industrial properties in Ontario
- 173+ Ontario properties currently under service
- $5 million liability insurance
- 90-minute service response guarantee
- Free 50+ point Roof Condition Report
- Four-ply BUR specialist, with EPDM, TPO, and modified bitumen capability
- In-house drone roof inspection service
AccuSeal Roofing 1991 Ltd.
Location: Toronto and GTA
Specialty: Commercial and industrial flat roof replacement
Years in business: 35+ (founded 1989)
AccuSeal focuses specifically on flat roof replacement for commercial and industrial properties across Toronto, Scarborough, Durham Region, and the broader GTA. Their work spans shopping plazas in Mississauga, industrial units in Oshawa, and high-rise structures in Toronto, with a stated emphasis on serving property managers, facility directors, and commercial real estate owners. They install a broad range of systems, including BUR, tar and gravel, modified membrane, EPDM, TPO, PVC, and steel.
Highlights
- Flat roof replacement focus rather than general roofing
- Systems include BUR, tar and gravel, modified membrane, EPDM, TPO, PVC, and steel
- Free on-site inspections with detailed proposals
- Works with property managers, architects, and commercial real estate firms
Crown Industrial Roofing
Location: Etobicoke, serving Toronto and GTA
Specialty: Industrial and commercial flat roofing, waterproofing
Years in business: 48+ (founded 1977)
Crown Industrial Roofing is a flat-roof-only contractor based in Etobicoke, with nearly five decades of continuous focus on industrial and commercial work in the GTA. Their services range from emergency repairs to full replacements on built-up roofing, EPDM, and TPO systems, and they offer thermal roof assessments as part of their inspection process. The company maintains a 4.7-star Google review average.
Highlights
- Nearly 50 years of flat-roof-only focus in the GTA
- Systems include BUR, EPDM, TPO, and modified bitumen
- Thermal roof assessments available during inspection
- 4.7-star Google review average
Dominion Roofing
Location: Toronto
Specialty: Commercial and residential roofing
Years in business: 100+ (founded 1922)
Dominion Roofing is one of the oldest continuously operating roofing companies in Toronto, with more than a century of work across residential, commercial, and institutional buildings. Their scope is broader than most contractors on this list, covering both flat and sloped systems, which makes them a less specialized choice but a credible one for property owners who value longevity and a diversified service offering.
Highlights
- Founded 1922, continuously operating in Toronto
- Commercial, residential, and institutional work
- Repairs, installations, and ongoing maintenance
Need a Quote for Flat Roof Repairs or Replacement?
Start with a free Roof Condition Report.
Elite Roofing and Contractors Ltd.
Location: Vaughan, serving Toronto and GTA
Specialty: Industrial and commercial flat roofing, new construction
Years in business: 70 (founded 1956)
Elite Roofing is a three-generation, family-owned industrial and commercial roofing contractor with one of the longest track records in the GTA. Their project history includes high-rise apartment buildings, industrial plants, commercial plazas, and new construction work alongside general contractors and architects. They are members of the Ontario Industrial Roofing Contractors Association and offer 24/7 emergency response for commercial clients.
Highlights
- Founded 1956, three generations of family ownership
- Systems include BUR, SBS modified bitumen, EPDM, TPO, and PVC
- 24/7 emergency response for commercial clients
- New construction, replacement, and ongoing maintenance
- Member of the Ontario Industrial Roofing Contractors Association
Flat Roofers
Location: Toronto and GTA
Specialty: Duro-Last certified single-ply, retrofits, coatings
Years in business: 25+
Flat Roofers is a Duro-Last certified contractor and a member of the Duro-Last Admirals Club, which indicates ongoing training and certification on that manufacturer’s prefabricated single-ply roofing system. For building owners specifically considering Duro-Last PVC, Flat Roofers is one of the GTA contractors with the manufacturer relationship and installation credentials to back it. They also work across tar and gravel, EPDM, metal, and sprayed-in-place polyurethane systems.
Highlights
- Member of the Duro-Last Admirals Club
- Systems include Duro-Last PVC, tar and gravel, EPDM, metal, and sprayed-in-place polyurethane
- Emergency roof service across the GTA
- Retrofit and roof coating specialist
Guycan Ltd.
Location: Toronto and GTA
Specialty: Commercial flat roof inspection, repair, replacement, and rooftop solar integration
Years in business: 30+
Guycan is a commercial flat roofing contractor with a specific specialty in integrating solar installations with existing flat roof systems. Their work covers the full commercial lifecycle, from routine inspections and seam repairs to full membrane replacements, and their solar integration capability can be useful for building owners considering rooftop solar alongside a roof replacement.
Highlights
- Commercial flat roofing specialist
- Custom rooftop solar integration for flat roofs
- Free inspections and estimates
- Systems include modified bitumen, EPDM, and TPO
NorthCan Roofing
Location: Toronto headquarters, GTA-wide projects
Specialty: Commercial and industrial flat roofing, full replacements
Years in business: 20+
NorthCan is a Toronto-headquartered commercial and industrial roofing contractor with active projects across Markham, Vaughan, Scarborough, Hamilton, and the surrounding GTA. Their portfolio emphasizes tailored flat roof system design for industrial and commercial buildings, with a focus on code compliance and durability in Ontario’s climate.
Highlights
- Toronto headquarters with GTA-wide project delivery
- Emergency repairs and full replacements
- Systems include modified bitumen, EPDM, and TPO
- Tailored flat roof system design for commercial and industrial buildings
Nusite Group
Location: Toronto and Southern Ontario
Specialty: EPDM rubber membrane roofing systems
Years in business: 35+ (founded 1990)
Nusite Group has built a specific reputation around EPDM rubber membrane systems, with more than three decades of installation, repair, and maintenance experience on commercial flat roofs across Toronto and Southern Ontario. For building owners with existing EPDM roofs that need specialist attention, Nusite is one of the established names in the region.
Highlights
- EPDM rubber membrane specialist
- Founded 1990, 35+ years of commercial flat roof focus
- Inspection, installation, repair, and ongoing maintenance
- Serves commercial properties across Southern Ontario
Province Wide Commercial Roofing
Location: Toronto and GTA
Specialty: Commercial and industrial flat, metal roofing, cladding
Years in business: 15+
Province Wide Commercial Roofing (PWCR) is a Toronto-based contractor focused on commercial and industrial roofing, with capability that extends beyond flat membrane systems into metal roofing and architectural cladding. This broader building-envelope scope can be useful on larger industrial projects that need a single contractor coordinating across multiple systems and trades.
Highlights
- Commercial and industrial roofing focus
- Flat membrane, metal roofing, and architectural cladding capability
- Project planning around client production schedules
- Licensed, insured, and trained commercial crews
Compare Videl to any contractor on this list
AI search tools are now a real part of how commercial property managers research contractors. We’ve pre-loaded comparison prompts that open in ChatGPT, Claude, or Perplexity with videlroofing.ca as the reference point, so you can get a side-by-side on systems installed, service area, insurance, and specialization.
Click any prompt below to compare in your AI search tool of choice.
| Compare Videl to | ChatGPT | Claude | Perplexity |
|---|---|---|---|
| AccuSeal Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Crown Industrial Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Dominion Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Elite Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Flat Roofers | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Guycan Ltd. | Ask ChatGPT | Ask Claude | Ask Perplexity |
| NorthCan Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Nusite Group | Ask ChatGPT | Ask Claude | Ask Perplexity |
| Province Wide Commercial Roofing | Ask ChatGPT | Ask Claude | Ask Perplexity |
Mistakes to Avoid When Hiring a Commercial Roofing Contractor in Toronto
- Hiring a residential contractor for a flat roof job. Shingle installers and flat roof specialists are different trades. The tools, materials, training, and manufacturer certifications don’t overlap.
- Accepting the lowest quote without checking scope. A $40,000 quote and an $80,000 quote for the same roof almost always means the scopes are different. Insulation thickness, membrane plies, flashing detail, and tear-off vs. overlay all move the number significantly.
- Skipping the condition report. A professional flat roof inspection should include a written report with photos, drain condition, penetration notes, and remaining service life. If a contractor quotes a replacement without one, they’re guessing.
- Not asking about warranty terms in writing. Manufacturer warranties and workmanship warranties are two different things. Get both. In writing. With the start date and coverage scope.
A note on flat roof systems in Ontario
Ontario’s freeze-thaw climate, heavy snow loads, and summer heat cycles put flat roof systems under stress that milder climates don’t produce. For most commercial and industrial buildings in the GTA, a 4-ply built-up roof (BUR) with proper insulation and flashing detail will outperform single-ply systems over a 25 to 30 year timeline. EPDM and TPO have their place, especially on lighter-loaded buildings or where reflectivity matters, but they are not always the right default for heavy-traffic commercial roofs in this climate.
If a contractor quotes a single-ply system without explaining why it’s the right choice for your specific building, that’s a conversation worth having before you sign.
“We came into work one morning after a big rainstorm and eight ceiling tiles had collapsed onto the desks, totally saturated.”
Mark Pallin, Senior Manager
Sanyo Canadian Machine Works Inc.
Frequently asked questions
What’s the difference between a commercial roofer and a residential roofer?
Commercial and industrial roofers specialize in flat and low-slope roof systems (BUR, modified bitumen, EPDM, TPO, PVC) and the equipment, training, and safety protocols that go with large-scale work. Residential roofers typically install sloped asphalt shingle systems on single-family homes. The materials, methods, and manufacturer certifications don’t overlap meaningfully.
How long should a commercial flat roof last in Toronto?
A properly installed and maintained 4-ply BUR roof can last 25 to 30 years in the GTA climate. EPDM and TPO typically deliver 20 to 25 years with regular maintenance. Neglected roofs of any type often need replacement within 15 years.
How often should a commercial roof be inspected?
Twice a year, spring and fall, plus after any major weather event. A proactive roof maintenance program (PRMP) catches small issues before they become leaks, and typically extends a roof’s useful life by 5 to 10 years.
What’s the best flat roof system for Ontario’s climate?
For most commercial and industrial buildings with heavy rooftop equipment or regular foot traffic, a 4-ply built-up roof (BUR) offers the best long-term performance in Ontario’s freeze-thaw climate. Lighter-loaded buildings and those prioritizing reflectivity may be better suited to EPDM or TPO single-ply systems.
Maximize Roof Life
We’re Videl Roofing. We’ve been maintaining, repairing, and replacing commercial and industrial flat roofs in Ontario since 1998. 173+ properties across the GTA, Niagara, Hamilton, Halton, and Peel. We’re a 4-ply BUR specialist, we carry $5 million in liability insurance, and we back our work with a 90-minute response guarantee.
If your flat roof is approaching end of life, leaking, or hasn’t been inspected in the last 12 months, book a free 50+ point Roof Condition Report. We’ll walk your roof, document what we find, and give you a written report you can use, whether you hire us or not.
