Getting in
How to become a commercial roofer in Ontario
Commercial roofing is learned on flat-roof crews — torch, mod-bit, TPO/EPDM heat-welding, and the discipline of hot-work safety. The business path runs through manufacturer certification, because warrantied systems are where commercial work lives.
Flat & Commercial Roofing at a glance
- Licence to do the work
- Not required — Working at Heights + torch safety mandatory; manufacturer certs gate the work
- Path in
- Flat-roof crews — torch/heat-weld skills, then manufacturer certification
- Regulated by
- MOL (heights, hot work); manufacturers (warranty programs)
- Insurance baseline
- High CGL — fire from torch work is the defining exposure
- Union route
- Roofers locals on ICI work
The path, step by step
- 1
Get on a flat-roof crew
Low-slope crews teach membrane systems, detail work (drains, curbs, flashings), and hot-work discipline. Working at Heights is mandatory before day one.
- 2
Learn the systems
Mod-bit torch, TPO/PVC heat-weld, EPDM adhesives, and insulation/vapour design — each manufacturer system has its own details, and the detail work is the craft.
Full guide: 449A Roofer - 3
Get manufacturer-trained
Manufacturer programs certify the foremen and contractors whose installs they warranty. Your path to running work is becoming the certified hands the warranty depends on.
- 4
Build the service book
Inspection and maintenance contracts with property managers are the recurring revenue — and the relationship that wins the replacement when the roof ages out.
The real picture
Commercial roofing is a different business from residential shingles wearing the same word — and the questions reflect the leap: torch/heat-weld skills and the fire risk that comes with them, the manufacturer-certification gate that controls warrantied work, the recurring service-contract money, and why the higher barrier means a higher ceiling and less competition.
What you'll actually make
From day one to the top of the trade. Ontario figures, approximate and worth verifying against current rates.
Labourer / helper
$20–28/hrTear-off, loading, and learning membrane systems.
Membrane roofer
$28–40/hrTorch, heat-weld, and detail work — the skilled core.
Foreman / certified installer
MoreThe certified hands a manufacturer warranty depends on.
Commercial roofing business owner
$120k–200k+Higher barrier, higher ceiling, recurring service revenue.
Which lane is right for you
Which membrane systems
Mod-bit (torch)
Modified-bitumen torch-applied roofing — skilled, and the source of the fire risk that defines commercial roofing's safety culture.
Best for: People who master hot-work discipline.
Single-ply (TPO / PVC / EPDM)
Heat-welded or adhered membranes — the dominant modern commercial systems, manufacturer-certified.
Best for: People who want the mainstream growth systems.
Service & maintenance
Inspection, repair, and roof-maintenance contracts — the recurring revenue, and the relationship that wins the replacement.
Pay: The recurring backbone.
Best for: Operators building stable revenue.
Getting in
On a flat-roof crew — low-slope crews teach membrane systems, detail work (drains, curbs, flashings), and hot-work discipline. Working at Heights is mandatory before day one. The business path runs through manufacturer certification (Carlisle, Soprema, Firestone, Sika Sarnafil), because their system warranties ride on your workmanship — and warrantied systems are where commercial work lives.
Where it leads (and the way out)
Own a commercial roofing business (built on manufacturer certification and a service-contract book), move into estimating, project management, or manufacturer rep work, or into roofing consulting/inspection. The recurring maintenance contracts make commercial roofing more stable than residential, and a company with certifications, a service book, and a safety record is a valuable, sellable asset.
Where the real conversations are
The communities, official bodies, and wage data tradespeople actually use.
Go to the source
The official pages that govern this trade. Bookmark these, they are the final word on requirements and fees.
- Skilled Trades OntarioTrade certifications, apprenticeship standards, and C of Q exams
- Start an apprenticeship (ontario.ca)How to register an apprenticeship in Ontario
- WSIBMandatory workplace insurance registration and clearance certificates
- CRA: Business RegistrationBusiness Number, HST/GST, payroll, and corporate tax accounts