1
Assessment
We get on the roof, survey the assembly, drains, flashings and penetrations, and photograph what we find.
Flat roofs only
commercial and industrial
24/7
emergency line
GTA and SW Ontario
service area
Free
on-site roof assessment
Commercial and Industrial Flat Roofing in Toronto
Repair, replacement and maintenance for low-slope roofs. We work for building owners, property managers and plant managers across the GTA and southwestern Ontario.
Book a free roof assessmentNorthCan Roofing is a commercial and industrial flat roofing contractor working out of 425 Alness Street in Toronto. We repair, replace, inspect and maintain low-slope roof systems in SBS modified bitumen, TPO, PVC, EPDM, built-up roofing and low-slope metal. Call 416-456-0777 to book a free roof assessment.
How we work
Three steps, no surprises
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Written scope and quote
You get the recommended system, the quantities, what is excluded and the sequence, in writing.
3
The work, documented
Site conduct, safety and clean-up planned around your operation, with a close-out record for your files.
What we do
Commercial and industrial flat roofing services
Repairs, replacement, inspections and planned maintenance on low-slope roofs across Toronto, the GTA and southwestern Ontario.
Commercial roofing
NorthCan Roofing is a commercial and industrial flat roofing contractor based at 425 Alness Street in Toronto. We install, repair, replace and maintain low-slope roof…
Learn moreFlat roof repairs
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Emergency roof repairs
If water is coming through your commercial roof right now, call NorthCan Roofing at 416-456-0777. Then move people and stock out of the area, contain the water, shut off…
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Flat roof replacement
A flat roof needs replacing when moisture has spread through the insulation, the membrane has failed across the field rather than at details, repairs keep returning to…
Learn moreRoof installation & replacement
A commercial roof replacement in Toronto is either a full tear-off back to the deck or a recover over the existing membrane. The choice depends on how many roof layers…
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Roof inspections
A commercial roof inspection is a walked survey of the roof that produces a written, photographed condition report: the assembly build-up, every deficiency ranked by…
Learn moreWhat does NorthCan Roofing do?
We work on the roofs nobody sees from the street. Flat and low-slope assemblies on offices, plazas, schools, warehouses, distribution centres, plants and mixed-use buildings, from a single seam repair to a full tear-off and rebuild of a multi-section roof.
The work divides into four things you can actually buy. Repairs when the field of the roof is sound and the failures are local. Replacement when moisture has spread through the insulation and every further patch is money spent on an assembly that is finished. Inspection and condition reporting when you need the decision put in writing before it reaches a budget meeting. And planned maintenance, which is what keeps the first two from arriving early.
Around that core sits the detail work that decides whether a flat roof lasts: flashing, coping and counterflashing, drainage correction, curb rebuilds under rooftop units, skylights and roof hatches, and low-slope and standing-seam metal. Water almost never enters through the middle of a membrane. It enters at a junction, and junctions are trade work.
What we do not do is residential. No sloped shingle roofs, no houses. Commercial and industrial low-slope is the whole business.
How does a roofing project run with NorthCan?
Three steps, and the first one costs nothing.
- Free roof assessment. We attend the building, walk the roof with you or your building contact, open test cuts where the assembly is unknown, check the deck, look at drainage and the perimeter, and photograph every failure point. You get a plain account of what is happening and what your options are, including the option of doing less than you feared.
- Written quote. The scope goes on paper: the assembly specified layer by layer, tear-off or recover, the flashing and drainage work, disposal, site logistics, hours of work and the price. It is written to be handed to an owner, a board or a head office without translation. If you need a fuller document for a capital plan, ask for a roof condition report instead.
- The work. A foreman on site who talks to your building contact, phased sections so no area of deck is ever left open overnight, drains kept clear through the job, and a final walk with your representative and a photo record of the completed details.
Between the quote and the first day, the unglamorous items get settled: crane or hoist placement, lane occupancy permits, material staging, bin location, tenant notice, fire watch procedure where torch work is involved, and the daily working window. Those are the items that turn a good price into a bad project when nobody agrees them in advance.
Who do you work with?
Four kinds of buyer, and each one needs something slightly different from us.
- Building owners who need the roof to reach the end of a hold period and want the capital decision documented before it becomes an emergency call.
- Property managers running multi-tenant office, retail and mixed-use buildings, where a drip on Monday morning is a tenant complaint by Monday afternoon. That work has its own page: roofing for property managers.
- Facility managers at schools, healthcare and institutional sites, where access is controlled, occupancy is constant and the work has to fit inside a term or a shutdown window.
- Plant and operations managers at warehouses, distribution centres and manufacturing sites, where production does not stop for a roof. See industrial roofing.
None of these people are buying a roof for themselves. It is a line in a capital plan, a risk on an insurance file and a source of complaints when it fails. We write for that reader. WSIB coverage and certificates of insurance are provided on request, which is usually the first thing a property management office needs on file.
Why does working only on flat roofs matter?
A low-slope roof is a different building assembly from a sloped one, not a flatter version of it. A shingle roof sheds water by gravity and tolerates imperfect detailing because nothing sits still on it. A flat roof holds water. Every seam, lap, curb, drain, pitch pocket and parapet junction is a place where standing water has time to find a defect, and the Ontario freeze-thaw cycle then opens that defect a little further with each pass through zero.
So the skills that matter are different. Membrane welding and torch technique. Reading a deck before setting a fastener pattern. Knowing when the insulation under an intact-looking surface is saturated, and proving it with test cuts and a moisture survey rather than guessing from above. Detailing a base flashing tall enough at a parapet. Building crickets so water reaches a drain rather than parking beside it. Sizing overflow scuppers so a blocked drain does not become a structural problem.
A contractor who does both markets divides attention between them. We do not. Our crews spend every working day on low-slope assemblies, our estimators quote nothing else, and the failures we have seen are all the same family of failures. That is the practical argument for specialisation: not that we care more, but that we have already met your problem.
It also shapes what we recommend. Because we are not selling one system, the answer to which membrane suits your building comes from the deck, the interior humidity load, the amount of rooftop equipment, the drainage design and how the roof will be maintained. Our comparison of flat roof types sets the options side by side.
Why building owners call us back
Flat and low-slope roofs are all we do.
No shingle crews, no split attention. Every foreman on site has spent their career on membrane roofs, parapets and drains.
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You get the condition, not a sales pitch.
Photographs, the failure mechanism, what is urgent and what can wait a budget cycle. If a repair is the right call, we say so.
02
Written scope before anyone lifts a tool.
Systems named, quantities stated, exclusions listed. A quote you can put beside another quote and actually compare.
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We work around your building, not the other way round.
Occupied buildings, live production, tenants and trading hours. Phasing and after-hours work are planned in, not bolted on.
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What happens if the roof is leaking today?
Call 416-456-0777. Our emergency line runs around the clock, because water entering an occupied building is not a scheduling item. The first job is to stabilise: find the entry point, dry in the area with a temporary membrane or a mechanically fastened patch, protect what is underneath, clear the drain if the water has nowhere to go, and photograph the condition for your insurance file. The permanent repair follows once the assembly is dry and the cause is confirmed, because a permanent detail installed into wet insulation simply fails again.
What to do before the crew arrives, and what to have ready when you call, is set out on the emergency roof repairs page.
Where do you work?
From the Alness Street yard near Keele and Finch we cover Toronto and the whole GTA, and we travel into southwestern Ontario for larger industrial work. Core cities include Toronto, Mississauga, Brampton, Vaughan, Markham, Oakville and Hamilton, reaching Barrie to the north and Kitchener to the west. The full list, grouped by region, is on the service areas page.
How do you get started?
Book the free roof assessment. It is the lowest-friction way to find out where you stand, and it produces something you can act on rather than another opinion. If you are budgeting before you are buying, the flat roof cost calculator shows the range the main variables produce, as a planning figure and not a quote.
Bring whatever you already hold: previous roofing invoices, the original specification, a roof plan, and a note of where water has appeared and when. A history of where and when water arrived tells us as much as the walk does, and on a large multi-area roof it shortens the diagnosis considerably.
Call 416-456-0777, email info@northcanroofing.com, or use the contact page. We are open Monday to Friday from 06:00 to 19:00 and on weekends from 09:00 to 17:00, with the emergency line running outside those hours.
Recent projects, filmed on the roof
Every one of these is a real NorthCan job. Nothing is stock.
Commercial flat roofing: winter torch-down repair
Emergency flat roof repair in the snow
NorthCan Roofing solutions
Where we work
Dispatched from Toronto across the GTA and southwestern Ontario
Crews run out of our yard at 425 Alness Street in Toronto. Pick your city for the local detail, or call and we will tell you straight away whether we cover the address.
You can also read what building owners have said about the work on our reviews page, or work through the roofing guides if you are still deciding what your roof needs.
Frequently asked questions
What kind of buildings does NorthCan Roofing work on?
Commercial and industrial buildings with flat or low-slope roofs: offices, plazas, retail, schools, healthcare and institutional properties, warehouses, distribution centres, manufacturing plants and mixed-use buildings. We do not work on residential sloped shingle roofs. If a low-rise residential or mixed-use building has a flat roof, that is work we handle.
Do you charge for the first site visit?
No. The roof assessment is free. We attend the building, walk the roof, document the condition and tell you what we found. A written quote for the work follows. A fuller roof condition report for capital planning is a separate, paid piece of work because it involves measurement, a moisture survey and a formal document.
Can you take on a roof another contractor installed or repaired?
Yes, and most of our work is on roofs somebody else built. We assess the assembly as we find it, including previous repairs, and tell you what is serviceable and what is not. Where a manufacturer system is involved we identify it so you know what is on the building before you decide anything.
What documentation do you provide before starting on site?
WSIB coverage and certificates of insurance on request, the written scope and quote, the site logistics plan covering access, staging and hours of work, and the health and safety documentation your site requires. Most property management offices ask for the insurance items first, so we send them early.
Do you work in winter?
Yes. Repairs and emergency stabilisation happen year round. Full replacements are possible through the winter with cold-temperature adhesives, self-adhered or torch-applied assemblies and adjusted welding parameters, but some systems and some adhesives have temperature limits, so the sequence and the system choice change with the season.
Ready for your free roof assessment?
Tell us the address, the roof size and what you are seeing. We will book a time to get up there and put it in writing.
Call 416-456-0777 for anything urgent. Our emergency line is answered around the clock.
Call 416-456-0777