Residential & Commercial Flat Roof Specialists
Flat Roofing Toronto Trusts. Built to Last.
Residential and commercial flat roof installation, replacement and repair across Toronto and the GTA. Free no-obligation quotes, warrantied workmanship and 24/7 emergency response. Flat roofing services 7 days a week.
24/7 Emergency Response
Leaks do not wait for business hours.
Free No-Obligation Quotes
Know the scope and the number first.
Manufacturer & Workmanship Warranties
Materials and installation both covered.
Residential & Commercial
Row houses and garages to warehouses and plazas.
Our Flat Roofing Services
Everything we do sits on a low-slope roof. Residential first, commercial second, and one number for an emergency at any hour.
Residential
Residential Flat Roofing
Rear roofs, garages and row house decks in torch-down, cold-ply, EPDM and TPO.
Residential
Residential Skylights
Curb-mounted units framed, set and flashed into a flat roof by roofers.
Residential
Attic Insulation & Ventilation
Blown-in, batt and rigid to an R-50 to R-60 target, plus the venting strategy.
Commercial
Commercial Flat Roof Installation
TPO, PVC, EPDM and modified bitumen, phased so the building keeps operating.
Commercial
Commercial Skylights
Domes, barrel vaults and glass units, curbed and flashed on low-slope roofs.
All Properties
24/7 Emergency Flat Roof Repair
Active leaks and storm damage, any hour. We stop the water, then fix the cause.
All Properties
Flat Roof Replacement
Tear-off, recover or targeted repair, decided by core samples rather than a guess.
Not sure which service you need?
Book a free on-roof assessment and we will tell you exactly what the roof needs, in writing.
Not sure which system you need? Compare all six flat roofing systems
150+ job-site photos from real Toronto flat roof projects
Residential
Flat Roofs on Homes, Garages and Additions
Toronto is full of row houses, laneway garages and rear additions sitting under low-slope roofs. We replace them properly, tie the flashing into the walls and parapets, and finish the details that decide whether a flat roof leaks.
- Flat roof replacement on homes and row houses
- Garage and rear addition roofs
- Skylight installation and curb flashing
- Attic insulation and ventilation
Commercial
Commercial Flat Roofing Across the GTA
Property managers and building owners call us when a roof has to keep working while the business underneath it stays open. We plan the sequencing, protect the interior and keep the site clean from tear-off to final walkthrough.
- Warehouses and industrial buildings
- Retail plazas and storefronts
- Condo and apartment rooftops
- Office and mixed-use buildings
24/7 emergency response, every day of the year
Flat Roofing Systems We Install
Every deck, budget and building is different. These are the systems we work with and where each one earns its place. Our flat roofing systems guide compares all six side by side.
Torch-Down
2-Ply Modified Bitumen
Two reinforced layers torched into one continuous surface. The workhorse system on GTA low-slope roofs.
- Two bonded reinforced plies
- Fully adhered, seam to seam
Cold Applied
Cold-Ply with Ceramic Granules
Adhesive-applied plies finished with a granule surface. No open flame anywhere on the deck.
- No torch on the roof
- Granule-surfaced finish
Heat-Welded
TPO Single-Ply
A heat-welded white membrane that reflects summer sun. A common pick for large commercial roofs where cooling load matters.
- Reflective white surface
- Hot-air welded seams
Synthetic Rubber
EPDM Rubber
Flexible synthetic rubber that takes Toronto freeze-thaw cycles in stride and patches cleanly when it is damaged.
- Moves with the deck
- Straightforward to patch
Chemical Resistant
PVC Single-Ply
Heat-welded seams with strong chemical resistance. Suited to roofs living under kitchen or industrial exhaust.
- Welded seam strength
- Handles grease and exhaust
Multi-Ply
Built-Up Tar & Gravel
Multiple bonded layers finished with gravel ballast. Heavy, long proven and still the right call on some decks.
- Multiple bonded layers
- Gravel ballast finish
Serving Toronto and the Greater Toronto Area
We work across the city and out through the GTA. Pick a region on the plan to see every city and borough we cover, or call and ask.
Select a region on the plan
Why Building Owners Call Us
No gimmicks and no padded promises. Here is what you actually get when you hire Flat Roofs Toronto.
Flat Roof Focus
Flat and low-slope roofing is all we do, so nothing about your roof is a first for us.
Real Project Proof
150+ job-site photos from real Toronto flat roof projects, shot on the roof rather than pulled from a stock library. Our hero images and system diagrams are illustrations, and are captioned as such.
Straight Answers and Honest Quotes
You get the scope, the system and the number in writing, with no pressure to sign on the spot.
Warrantied Workmanship
Manufacturer warranties on the materials and workmanship warranties on the installation.
Emergency Response
24/7 emergency flat roof repair, because water moving through a building does not wait for morning.
Serving Toronto Over 16 Years
Over 16 years on Toronto flat roofs, through every kind of winter this city produces.
Flat Roof Projects in Toronto and the GTA
Torch-down, cold-ply, TPO and skylight work on homes and commercial buildings, documented on site as each job runs.
Lumbered Slope Build and Two-Ply System, Toronto
A lumbered slope framed over a flat roof deck to move water toward the drains, with a two-ply system installed over it.
Flat Roof Application Detail, Toronto
A detail from a flat roof membrane application, showing the finished surface of the system.
Attic Inspection and Blown-In Insulation, Toronto
Inspection of a flat roof attic space followed by blown-in insulation. The cavity is checked before any insulation is added.
Parapet Wall Membrane and Cap Detail, Toronto
Membrane and cap detailing along a repaired parapet wall, where the roof surface meets the vertical upstand.
Parapet Wall Repair and Reflashing, Toronto
Repair work to a parapet wall on a flat roof. The wall is made good and the membrane is carried up and reterminated against it.
Crew at Work on a Toronto Flat Roof
Crew members at work on a low-slope roof, photographed during a February 2021 installation.
Flat Roofing Advice
Membranes, drainage, insulation and what a Toronto winter does to a low-slope roof, written by the crews who work on them.
Emergency Roof Repair in Scarborough: What to Do First
Emergency roof repair in Scarborough: what to do in the first hour, 2026 repair cost ranges, insurance guidance, and how to stop a leak before it spreads.
Commercial Flat Roof Replacement in North York: 2026 Costs
Commercial flat roof replacement in North York: 2026 costs per square foot, membrane options, permits, timelines and how to compare contractor quotes.
Commercial Flat Roofing in Downtown Toronto: An Owner Guide
Commercial flat roofing in Downtown Toronto: 2026 costs, membrane systems, permits, drainage and maintenance guidance for low-rise commercial building owners.
How a Flat Roofs Toronto Job Runs
Five steps from the first phone call to the warranty paperwork.
1
Call or Request a Quote
Reach us at (647) 333-3528 or send the details through the site.
2
Free Inspection and Assessment
We get on the roof, find the real problem and photograph what we find.
3
Detailed Written Quote
Scope, system, materials and price, with no obligation to proceed.
4
Scheduled Installation or Repair
We book the work, protect the site and keep you posted as it runs.
5
Final Walkthrough and Warranty
We walk the finished roof with you and hand over your warranty paperwork.
Flat Roofing Questions We Get Asked
The questions Toronto homeowners and building owners ask us most.
How long does a flat roof last in Toronto?
A properly installed flat roof in Toronto generally lasts 20 to 30 years. Where yours lands in that range depends on the material, the quality of the installation and how consistently it gets inspected and maintained.
What does a flat roof cost in Toronto?
Cost tracks roof size, material choice and complexity. Repairs can start at a few hundred dollars, while full replacements typically run $8 to $15 per square foot. We give free, no-obligation quotes so you see the real number before deciding anything.
Do you handle emergency flat roof repairs?
Yes. We run 24/7 emergency flat roof repair across Toronto and the GTA to stop active leaks and limit interior damage, which matters most during heavy rain and storms.
What warranties come with the work?
Two kinds. Manufacturer warranties cover the roofing materials themselves, and our workmanship warranty covers the installation we performed.
Which membrane is right for my building?
For Toronto freeze-thaw cycles, modified bitumen and EPDM rubber are popular for their durability and flexibility. TPO and PVC single-ply are strong options on larger commercial roofs. We walk your roof first, then recommend the system that fits the deck, the exposure and the budget.
Why does water sit on my flat roof?
Ponding water is one of the clearest warning signs on a low-slope roof, alongside visible cracks, blistering, deteriorating seams and leaks showing up inside. It usually points to drainage or slope problems. Book an inspection and we will tell you whether it needs a repair or a replacement.
Free, No Obligation
Request a Free Quote
Tell us what the roof is doing and we will come and look at it. Free across Toronto and the GTA, with no obligation to proceed.
Call Us
Office Hours
Open 7 days a week: 7:00am to 11:30pm
Emergencies
The line above is answered 24/7 for anything that cannot wait, including weekends and statutory holidays.
@flatroofstoronto
Follow the Work on Instagram
Torch-down, cold-ply, skylight curbs and finished decks, photographed on Toronto and GTA roofs as the work happens.
Google Reviews
What Property Owners Say
These come straight from our Google Business Profile. We cannot edit them, reorder them or take one down, and the rating in the header is whatever Google is showing today.
Free, No Obligation
Get a Free Quote on Your Flat Roof
Tell us what the roof is doing and we will come look at it. No cost, no obligation, and a straight answer about whether it needs a repair or a replacement.