Roof replacement cost Ontario is something every homeowner will encounter eventually. Your roof is your home’s first line of defense against the elements—protecting everything inside from wind, rain, snow, and extreme temperatures. Over time, even the best roofing systems wear down due to age, weather damage, or poor ventilation.
When that time comes, replacing your roof is not just a cosmetic upgrade—it’s a critical investment in your home’s safety, energy efficiency, and long-term value.
But how much does it actually cost to replace a roof in Ontario?
The short answer: it depends. Factors like the size of your roof, the material you choose, and the complexity of the installation all impact the final cost. In this guide, we’ll break down the elements that influence roof replacement cost in Ontario so you can budget confidently and make an informed decision.
What Affects the Cost of Roof Replacement?
Many factors come into play when calculating roof replacement costs. They include the type of material you choose, the size of your home, and the complexity of the installation. Let’s break down each element in detail below.
Material Choices
The type of roofing material you choose will have a major effect on your total investment. Here are some common options:
- Asphalt Shingles: The most popular roofing material in Ontario. Affordable, easy to install, and available in a variety of colours. Cost: $4.50 to $7.00 per square foot installed.
- Metal Roofing: Known for its durability and long lifespan. Resistant to fire, mildew, and insects. Ideal for homes in snowy or high-wind regions. Cost: $9.00 to $16.00 per square foot installed.
- Synthetic or Slate Roofing: High-end options with unmatched longevity and curb appeal. Best suited for luxury homes. Cost: $20.00+ per square foot installed.
Each material has its own benefits and lifespan, so consider both the upfront and long-term value when making your choice.
Labour Costs
Labour typically makes up 40–60% of your total roof replacement cost. Trained professionals ensure proper installation, ventilation, and waterproofing—key factors in protecting your home and preserving warranties.
Labour costs depend on:
- Roof pitch and steepness
- Layers being removed
- Roof height and accessibility
- Roof complexity (peaks, valleys, skylights)
Average Range: $2.50 to $5.00 per sq. ft.
Removal and Disposal of Old Roofing
If your existing roof needs to be removed, additional costs apply for:
- Tearing off shingles
- Inspecting underlayment
- Disposing of old materials
Estimated Cost: $1,000 to $3,000 depending on roof size and layers
Roof Size and Complexity
Larger and more complex roofs require more labour, materials, and time.
General Estimates:
- Small homes (under 2,000 sq. ft.): $6,000 – $10,000
- Medium homes (2,000–3,000 sq. ft.): $10,000 – $15,000
- Large homes (3,000+ sq. ft.): $15,000 – $20,000+
Add-ons like chimneys, dormers, or multi-level roofing can increase complexity.
Additional Features and Upgrades
SUpgrades can enhance your roof’s performance, longevity, and energy efficiency:
- Underlayment: A protective barrier installed beneath your shingles that helps prevent water infiltration and roof deck damage
- Improved Ventilation: Reduces moisture buildup and heat retention, extending your roof’s lifespan
- New Flashing or Eavestroughs: Often replaced during roof upgrades to ensure watertight protection
- Insulation Upgrades: Increases energy efficiency and indoor comfort year-round
While these add-ons may increase your upfront cost, they offer significant long-term savings and protection.
DIY Roof Replacement vs. Professional Installation
While DIY might seem like a cost-saver, roofing is not a job for beginners. Improper installation can lead to:
- Major leaks
- Voided warranties
- Structural issues
- Serious injury
Professional installation offers:
- Correct waterproofing and underlayment
- Warranty protection
- Proper flashing and ventilation
- Long-term peace of mind
At Gateway Exteriors, our certified crews ensure every roof meets industry standards—no shortcuts.
How to Get the Best Value for Roof Replacement Ontario
Here are 4 key ways to maximize your investment in Ontario:
- Get multiple quotes from trusted, local contractors
- Verify references and reviews before committing
- Ask about warranties on both materials and labour
- Don’t choose based on price alone—experience and service matter
At Gateway Exteriors, we offer free estimates, flexible financing, and top-tier workmanship—backed by industry-leading warranties to protect your home.
Have More Questions About Roof Replacement Cost in Ontario?
For more in-depth answers to common roofing questions—like lifespan, warranty, materials, and seasonal concerns—check out our Roofing FAQ page.
You’ll find helpful insights tailored to Ontario homeowners looking to make informed decisions about their next roof replacement.
Need a Roof Replacement? Contact Gateway Exteriors in Hamilton, ON
If you’re planning to replace your roof, don’t leave it to chance. At Gateway Exteriors, we help homeowners across Ontario protect and enhance their homes with high-quality roofing systems tailored to your needs and budget.
Whether you’re upgrading to a metal roof or replacing worn shingles, we’ll walk you through the process—from consultation to cleanup.
Contact us today for a free, no-obligation estimate and expert advice.
Click here to book your free quote
