Flat roof repair and installation across York Region
York Region Flat Roof Repair, Installation, and Replacement
Flat and low-slope roofing is the whole business here. Installation, replacement and repair across York Region, with 24/7 emergency response and a free written quote first.
What you get from Flat Roofs Toronto
24/7 Emergency Response
Leaks do not wait for business hours.
Free No-Obligation Quotes
Scope, system and number, in writing, first.
Manufacturer & Workmanship Warranties
The materials and the installation are both covered.
Flat Roofs Only
Low-slope work is the whole business, not a sideline.
Flat Roofing Across York Region
York Region is newer built than Toronto, and its flat roofs reflect that. In Markham, Richmond Hill, Vaughan, Aurora and Newmarket the subdivisions are largely sloped roofed, but flat sections appear constantly: over attached garages, porticos, rear wings, sunrooms and the modern flat roofed custom homes that have become common on larger lots and in Thornhill and King City. The commercial picture is different again. The Highway 7 corridor, the Concord and Woodbridge business parks and the big box power centres along Highway 400 and 404 are all large low slope membrane roofs with heavy rooftop equipment. Because much of this stock went up in the 1990s and 2000s, a lot of it is now reaching the point where the original membrane needs replacing rather than patching.
Why Flat Roofs Are Everywhere in York Region
- Subdivision homes across York Region carry flat sections over garages, porticos and rear wings, and modern custom builds increasingly go fully flat.
- Business parks in Concord, Woodbridge and along Highway 7 are built on large low slope roofs with heavy rooftop mechanical loads.
- Big box retail and power centres along the 400 and 404 corridors use commercial membrane systems that are now due for first replacement.
Residential and Commercial Flat Roofing in York Region
Two different kinds of roof, two different ways of working. Both are everyday work for these crews.
Residential
Homes and Additions in York Region
Residential flat roofing in York Region is often about a small section done properly. A garage roof, portico or rear wing that ties into a two storey wall needs correct counterflashing into the brick or stucco, a real slope toward the drainage edge and a membrane that handles snow load. On modern flat roofed homes the whole roof is low slope with parapets and often a roof deck, which calls for a fully detailed system with tapered insulation and protected drainage.
Commercial
Commercial Buildings in York Region
Commercial low slope work in York Region covers business park buildings, plazas, big box retail, schools and municipal facilities. We install TPO, PVC, EPDM and modified bitumen, rebuild drains and sumps, add tapered insulation to correct ponding, and detail curbs around rooftop units and exhaust. Work in occupied buildings is phased so tenants keep trading, and we offer 24/7 emergency flat roof repair when a leak affects stock, equipment or occupied space.
Flat Roofing Services in York Region
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 additions, garages and row house decks. Tear-off to sound deck, new two-ply or single-ply membrane, and rebuilt flashing where the flat section meets the slope.
Replacement
Flat Roof Replacement
Core samples first, then a full tear-off, dry insulation, corrected slope and a new membrane, quoted in writing before anything comes off.
24/7
24/7 Emergency Flat Roof Repair
Active leaks, storm damage and open seams, answered around the clock. We stop the water first, then come back and fix the cause properly.
Daylight
Residential Flat Roof Skylights
Curb-mounted units framed into the deck, flashed by roofers and tied back into the membrane, plus replacements where the glazing has fogged.
Commercial
Commercial Flat Roof Installation
TPO, PVC, EPDM and modified bitumen on commercial and industrial low-slope roofs, phased so the building keeps operating.
Commercial
Commercial Flat Roof Skylights
Domes, barrel vaults and glass units, curbed and flashed by roofers, plus smoke vents and roof hatches surveyed in the same visit.
Residential
Attic Insulation and Ventilation
The cavity under the deck, to an R-50 to R-60 target where the depth allows it, with the venting strategy settled rather than left half of each.
Guide
Compare Every System
Six systems compared on lifespan, seams, fire behaviour, cost tier and the deck each one suits, so the quote you get is one you can read.
Flat Roof Systems We Install in York Region
We are not tied to one membrane. The system we quote for a roof in York Region is the one that suits the deck, the drainage and the way the building is used. Compare every system side by side.
Two Ply
Modified Bitumen
Torch-applied or self-adhered SBS in two plies, with a granule-surfaced cap. The default on Toronto houses because it handles tight perimeters, curbs and wall terminations without a wide sheet.
- 15 to 20 year service life
- Redundant second ply
- Repairs patch cleanly
Torch Free
Cold-Ply
The same two-ply build assembled in cold adhesive rather than with an open flame. It is what we specify over occupied buildings, beside vinyl siding and anywhere a torch is not welcome.
- No open flame on the roof
- Low odour on occupied buildings
- Granule-surfaced cap
Single Ply
TPO and PVC
Hot-air welded thermoplastic sheet, laid in wide rolls with far fewer seams. It suits large commercial fields, and the reflective white surface keeps a warehouse roof cooler through a Toronto summer.
- Welded rather than glued seams
- Reflective white surface
- Fast over large areas
Rubber
EPDM
A synthetic rubber membrane that stays flexible through freeze thaw movement and takes ponding better than most. Common on garages, additions and small commercial decks.
- Flexible in cold weather
- Tolerates standing water
- Simple to detail and repair
Cities We Cover in York Region
Each city below has its own page. Pick yours, or call and ask about somewhere we have not named.
Select a region on the plan
What We Watch For on a York Region Flat Roof
The conditions that decide how long a roof here lasts, and what we detail differently because of them.
- York Region sits farther from the lake and gets colder overnight lows, so freeze thaw cycling on membrane seams and flashing is severe.
- Open subdivision and business park sites offer little wind shelter, which loads roof perimeters, corners and edge metal.
- Snow drifts deeply against the tall walls that flat garage and portico roofs tie into, concentrating load exactly at the flashing.
- Large 1990s and 2000s commercial roofs across the region are reaching the end of their original membrane life at roughly the same time.
Recent Flat Roofing Projects
Real jobs photographed on site across Toronto and the GTA. Our projects are not tagged to a single area, so these are the most recent rather than the nearest.
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.
Flat Roofing Advice for York Region
Membranes, drainage, insulation and what this climate does to a low-slope roof.
Flat Roofing in Richmond Hill: Best Systems for 2026
A practical 2026 guide to flat roofing in Richmond Hill: best membrane systems, real installed costs, Ontario Building Code insulation and drainage rules.
Commercial Flat Roofing in Markham: 2026 Guide
Commercial flat roofing in Markham: 2026 costs, membrane systems, drainage and Ontario Building Code rules, permits and maintenance for GTA building owners.
Commercial Flat Roofing in Vaughan: An Owner Guide
Commercial flat roofing Vaughan guide: 2026 costs, TPO, EPDM and modified bitumen options, drainage, permits and maintenance for York Region building owners.
Flat Roofing Questions From York Region
The questions we are asked most often on roofs in this part of the city.
Do you cover all of York Region for flat roofing?
Yes. We work throughout York Region, including Markham, Richmond Hill, Vaughan, Woodbridge, Concord, Maple, Thornhill, Aurora, Newmarket and King City. Residential work is usually flat sections over garages, porticos and rear wings or full flat roofed custom homes, and commercial work covers business park buildings, plazas and retail.
Why does my York Region garage roof keep leaking at the wall?
A flat garage roof in York Region almost always ties into a taller house wall, and that junction takes the snow that drifts and slides against it. If the counterflashing was never properly set into the brick or stucco, meltwater runs behind the membrane instead of over it. The fix is rebuilding the wall flashing detail, not sealing the surface.
Do you replace business park roofs in York Region?
Yes. The business parks across York Region, particularly in Concord, Woodbridge and along the Highway 7 corridor, are built on large low slope roofs that are now due for replacement. We handle full tear off, tapered insulation, drain rebuilds and curb detailing, and we phase the work around tenant operations and shipping schedules.
Is a flat roof a problem in York Region winters?
A well built flat roof handles York Region winters without difficulty. Problems come from standing water that freezes, blocked drains and scuppers, and flashing that was never detailed for drifting snow. Because the region gets colder overnight lows than the lakeshore, freeze thaw movement is harder on seams, which is why tear off and proper detailing matter more than the membrane brand.
What does a flat roof cost in York Region?
Flat roof replacement generally runs about $8 to $15 per square foot depending on the system, the number of layers coming off, deck and insulation condition, and the amount of drain and flashing work needed. A small garage roof and a large business park roof price very differently. We provide a free no obligation quote after inspecting the roof.
Free, No Obligation
Request a Free Quote in York Region
Tell us what the roof is doing and we will come and look at it. No charge, and 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.
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Reviews From York Region
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Free, No Obligation
Get a Free Flat Roof Quote in York Region
Call Flat Roofs Toronto at (647) 333-3528 for a free no obligation quote on your York Region flat roof.