Cost Guide
Roof Replacement Cost Ontario 2026
Real per-square-foot pricing for asphalt shingles, metal, flat roofing, and cedar shakes in Ontario. What drives the cost up, when to repair instead of replace, and how Ontario's climate affects your decision.
Key Takeaways
- A typical 1,500 sq ft asphalt shingle roof replacement in Ontario costs $8,500 to $18,000 installed, with the average landing around $10,500 (roughly $7/sq ft).[1]
- Metal roofing costs 2 to 3 times more upfront ($10,500 to $45,000+) but lasts 40 to 70 years, with 30 to 50 year warranties.[7]
- Old roof tear-off adds $1 to $3 per square foot to your total, and underlayment replacement adds another $2 to $3 per square foot.[2]
- Ontario's freeze-thaw cycles, ice dams, and snow loads accelerate roof wear. Proper attic ventilation and ice-and-water shield at the eaves are critical for any material.[5]
- Know when to repair vs. replace. Isolated damage runs $300 to $1,500 to fix; widespread deterioration on a roof over 20 years old means replacement is the smarter investment.[4]
Roof Replacement Cost by Material
The material you choose is the single biggest factor in your final bill. Here is what each option costs per square foot installed, along with the total range for a 1,500 square foot roof (the Ontario average for a two-storey home).[1]
| Material | Cost per Sq Ft | 1,500 Sq Ft Roof | Lifespan |
|---|---|---|---|
| 3-tab asphalt shingles | $3.00 - $5.00 | $4,500 - $7,500 | 15 - 20 years |
| Architectural asphalt shingles | $5.00 - $8.00 | $7,500 - $12,000 | 20 - 30 years |
| Steel profiled panels | $8.75 - $15.00 | $13,125 - $22,500 | 40 - 60 years |
| Standing seam metal | $15.00 - $43.00 | $22,500 - $45,000+ | 50 - 70 years |
| Flat (TPO/EPDM/elastomeric) | $13.00 - $23.00+ | $19,500 - $34,500+ | 20 - 30 years |
| Cedar shakes | $12.00 - $25.00 | $18,000 - $37,500 | 25 - 40 years |
Most Ontario homeowners end up with architectural asphalt shingles. They hit the sweet spot of cost, durability, and curb appeal. Three-tab shingles are cheaper, but they look flat, wear faster in Ontario winters, and many roofers have moved away from them entirely.[1]
Asphalt Shingles: The Ontario Standard
Asphalt shingles cover the vast majority of Ontario homes, and for good reason. They are affordable, widely available, and every roofing contractor in the province knows how to install them. The real choice is between three-tab and architectural (also called laminated or dimensional) shingles.[2]
Three-tab shinglesrun $3 to $5 per square foot installed and last 15 to 20 years. They are a single layer with a uniform, flat appearance. In Ontario's climate, the lower end of that lifespan range is more realistic. Heavy freeze-thaw cycling and ice dam exposure take a toll.[6]
Architectural shingles cost $5 to $8 per square foot installed and last 20 to 30 years. They are thicker, more wind-resistant (rated for 110 to 130+ km/h), and have a textured, dimensional look. The price premium over three-tab is typically $2 to $3 per square foot, which works out to $3,000 to $4,500 more on a 1,500 square foot roof. Given the longer lifespan, the cost per year of service is actually similar.[1]
Metal Roofing: The Long-Term Play
Metal roofing has been gaining ground in Ontario, particularly in areas with heavy snowfall. The range is wide because "metal roofing" covers everything from basic steel panels at $8.75 per square foot to premium standing seam copper or zinc at $43+ per square foot.[7]
For most Ontario homeowners considering metal, the practical options are steel profiled panels ($8.75 to $15/sq ft) or standing seam steel ($15 to $25/sq ft). Both handle snow loads well because snow slides off rather than accumulating, and they resist the freeze-thaw damage that shortens asphalt lifespans.[7]
The math on metal vs. asphalt is straightforward. A metal roof costs roughly 2 to 3 times more upfront, but it lasts 2 to 3 times longer.[7] Metal roofs carry 30 to 50 year warranties, compared to 20 to 30 years for architectural shingles. If you plan to stay in your home long-term, the total cost of ownership can actually be lower with metal since you avoid a second replacement cycle.
Where Metal Makes the Most Sense
- Properties in heavy snowfall regions (Muskoka, Ottawa Valley, Northern Ontario) where snow shedding reduces structural load.
- Homes with steep pitches where snow accumulation creates ice dam risk on asphalt.
- Rural or cottage properties where a 50+ year roof eliminates the hassle of future replacements.
- Homeowners planning to stay 15+ years, where the upfront premium pays for itself.
Flat Roofing and Cedar Shakes
Flat roofing (TPO, EPDM, or elastomeric membranes) is primarily used on commercial buildings, but it shows up on residential additions, sunrooms, and some modern Ontario home designs. At $13 to $23+ per square foot installed, flat roofing is pricier per square foot than sloped asphalt, though the total area is usually smaller.[4]
Cedar shakes offer a classic, traditional look that suits heritage Ontario homes and rural properties. At $12 to $25 per square foot, they are a premium choice that requires more maintenance than asphalt or metal. Cedar needs periodic treatment to prevent moss, mildew, and decay. Lifespan is 25 to 40 years with proper upkeep.[5]
What Drives Your Roof Replacement Cost Up
The material price per square foot is just the starting point. Several factors can push your final bill well above the base material cost.[2]
Tear-Off and Disposal
Ontario building code limits the number of shingle layers to two. If your existing roof already has two layers, or if the decking underneath needs inspection, a full tear-off is required. This adds $1 to $3 per square foot ($1,500 to $4,500 on a 1,500 sq ft roof) for labour and disposal fees.[3]
Underlayment and Ice Shield
Replacing the underlayment (the waterproof membrane beneath your shingles) adds $2 to $3 per square foot. In Ontario, ice and water shield is essential along the eaves, valleys, and around penetrations. This is not optional in our climate; it is a code requirement in most municipalities and the single best defense against ice dam leaks.[2]
Roof Slope and Complexity
Steeper roofs cost more because they require additional safety equipment, slower installation, and more material waste at cuts. A roof with a 12/12 pitch can cost 20 to 30% more in labour than a standard 4/12 or 6/12 slope. Dormers, valleys, skylights, and multiple roof planes all add complexity and cost.[3]
Flashing, Vents, and Penetrations
Every chimney, plumbing vent, skylight, and roof-to-wall junction needs proper flashing. Replacing old or corroded flashing during a re-roof is standard practice, but it adds to the total. Expect $200 to $800+ depending on the number and complexity of penetrations.[4]
| Cost Factor | Added Cost | Notes |
|---|---|---|
| Old roof tear-off | $1 - $3/sq ft | Required if two layers exist or decking needs inspection |
| Underlayment replacement | $2 - $3/sq ft | Includes ice and water shield at eaves |
| Steep pitch premium | +20 - 30% | Labour increase for pitches above 8/12 |
| Flashing and penetrations | $200 - $800+ | Chimneys, skylights, plumbing vents |
| Decking repair | $4 - $8/sq ft | Rotted plywood replacement (if needed) |
Ontario Climate: Why Your Roof Works Harder
Ontario is one of the toughest climates for roofing in North America. The combination of heavy snowfall, frequent freeze-thaw cycles, summer heat, and wind-driven rain puts more stress on roofing materials than most of the continent.[5]
Ice Dams
Ice dams are the single most common cause of premature roof failure in Ontario. They form when heat escapes through a poorly insulated attic, melting snow on the upper roof. The meltwater refreezes at the cold eaves, creating a dam that forces water under the shingles. The fix is not on the roof itself; it is in the attic. Proper insulation (R-60 per Ontario Building Code) and ventilation (balanced soffit and ridge vents) prevent ice dams by keeping the roof deck cold and uniform.[5]
If you are replacing your roof, this is the time to address attic insulation and ventilation. A new roof over an under-insulated attic will still develop ice dams. See our attic insulation cost guide for what that upgrade runs in Ontario.
Snow Load
Ontario's structural snow loads range from 1.0 kPa in the GTA to 2.5+ kPa in northern and cottage regions. Metal roofing handles snow better than asphalt because snow slides off rather than accumulating. For areas with heavy snowfall, metal is worth the premium for reduced structural stress and fewer ice-related issues.[7]
When to Repair vs. Replace
Not every roof problem means a full replacement. Here is how to decide.
Repair Makes Sense When:
- Damage is localized to a small area (a few missing or cracked shingles, one section of damaged flashing).
- The roof is under 15 years old and the rest of the surface is in good condition.
- The issue is limited to a specific penetration (chimney flashing, vent boot, or skylight seal).
- Repair cost is under $1,500 and addresses the root cause.[4]
Replace When You See:
- Widespread curling, cracking, or buckling across multiple areas of the roof.
- Sagging sections in the roofline, which may indicate structural or decking issues underneath.
- Bare granules collecting in gutters after every rain. The protective layer is gone.
- Damaged or deteriorating flashing at multiple points.
- Water stains on interior ceilings or walls (active leaks).
- The roof is over 20 years old. Even if it looks acceptable from ground level, the material is near end of life.[1]
A common mistake is spending $2,000 to $3,000 on patch repairs for a roof that needs replacement within 2 to 3 years anyway. If repair costs approach 30% or more of a full replacement, the replacement is usually the better investment.
Pair Your Roof with an Insulation Upgrade
A roof replacement is the ideal time to upgrade your attic insulation, and Ontario homeowners have a financial incentive to do both. The SaveOnEnergy Home Renovation Savings Program (HRS) offers up to $1,000 for a standalone attic insulation upgrade, and combining insulation with other energy improvements can unlock up to $7,700 in total rebates. See our complete Ontario energy rebates guide for every program available. Use our rebate checker to see what you qualify for.
Since the roofing crew will already be working above the attic space, coordinating insulation work at the same time saves on logistics and avoids disturbing new roofing with a second project later. Proper R-60 attic insulation also prevents the ice dams that damage roofs prematurely, protecting your new investment.
For full pricing details, see our attic insulation cost guide for Ontario.
How to Keep Costs Down
- Get three quotes minimum. Pricing varies significantly between contractors. A $12,000 quote from one company might come in at $9,500 from another for the same materials and scope. Our cost calculator can give you a baseline to compare against.[3]
- Book in the off-season. Late fall and early spring (before May) are slower periods for roofers. Some contractors offer 5 to 15% discounts to keep crews busy.
- Choose architectural shingles over premium lines. Mid-range architectural shingles from any major manufacturer (IKO, BP, CertainTeed, GAF) perform well in Ontario. Designer and ultra-premium lines add cost without proportional durability gains.
- Bundle with insulation. Doing attic insulation at the same time eliminates a second mobilization cost and may qualify for SaveOnEnergy rebates.
- Check for manufacturer promotions. Shingle manufacturers periodically offer extended warranty promotions or rebates through certified contractors.
Related Guides
A roof project often connects to other home improvements. These guides cover related costs and decisions.
- Attic Insulation Cost Ontario - the best time to insulate is when the roof is off
- Ontario Home Energy Rebates 2026 - rebates for insulation bundled with your roof project
- Windows and Doors Cost Ontario - another major exterior upgrade often paired with roofing
- Solar Panels Ontario: Worth It? - a new roof is the ideal time to add solar
- HVAC Financing Ontario - financing options that may also cover roofing projects
Frequently Asked Questions
How much does it cost to replace a roof in Ontario?
For a typical 1,500 square foot roof in Ontario, expect to pay $8,500 to $18,000 for architectural asphalt shingles installed. Metal roofing runs $10,500 to $45,000 or more depending on the profile. The average homeowner in the GTA pays around $10,500 for a standard asphalt shingle replacement at roughly $7 per square foot.
How long does a roof last in Ontario?
Lifespan depends on the material and Ontario's freeze-thaw cycles. Three-tab asphalt shingles last 15 to 20 years, architectural asphalt shingles last 20 to 30 years, and metal roofing lasts 40 to 70 years. Ontario's climate with heavy snow, ice dams, and temperature swings tends to shorten asphalt lifespans compared to milder regions.
Is metal roofing worth the extra cost in Ontario?
Metal roofing costs 2 to 3 times more upfront than asphalt shingles, but it lasts 2 to 3 times longer. A metal roof at $10,500 to $45,000 comes with 30 to 50 year warranties and handles Ontario snow loads better than asphalt. If you plan to stay in your home for 15 or more years, metal often costs less per year of service.
When should I replace my roof instead of repairing it?
Replace rather than repair when you see widespread curling, cracking, or missing shingles across multiple areas, sagging in the roofline, bare granules in gutters after rain, or if the roof is over 20 years old. Isolated damage like a few missing shingles or localized flashing issues can usually be repaired for $300 to $1,500.
Does a new roof increase home value in Ontario?
Yes. A new roof typically recovers 60 to 70% of its cost at resale and can make or break a sale. Buyers and home inspectors flag aging roofs, and a deteriorating roof will often result in price reductions larger than the cost of replacement. A new roof also improves curb appeal and eliminates a major concern for buyers.
What is the cheapest roofing material in Ontario?
Three-tab asphalt shingles are the most affordable option at $3 to $5 per square foot installed, or roughly $4,500 to $7,500 for a 1,500 square foot roof. However, their shorter 15 to 20 year lifespan means you may need to replace them sooner. Architectural asphalt shingles at $5 to $8 per square foot offer better durability and are the most popular choice.
How long does a roof replacement take?
Most residential roof replacements in Ontario take 1 to 3 days for asphalt shingles and 3 to 5 days for metal roofing. Weather delays are common, especially in spring and fall. A simple tear-off and re-shingle on a standard-pitch roof can sometimes be completed in a single day by a full crew.
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