Your Leading Commercial Roof Replacement Experts Since 1922

A commercial roof replacement job can be complicated – that’s why you need the best. Our commercial flat roof replacement team has years of experience helping businesses repair their roofs. Contact the only commercial roof replacement Toronto business with over 100 years of success. 

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    Dominion Roofing offers a wide range of residential and commercial roofing services in Toronto. From roof repairs to re-roofs, this roofing company has got you covered!


    Flat Roofing Toronto

    Commercial Roof Replacement Experts with Over 100 Years of Success

    In the event that a commercial roof repair job is not enough, we can help you by undertaking a full commercial roof replacement. 

    We don’t want your business to experience any downtime and lost revenue due to construction getting in the way; we make sure to get the job done as fast as possible without overlooking any details. Our combination of speed and accuracy is only achievable after you’ve had over a century in the business. 

    Our commercial roof replacement includes:

    • Removal of old roofing 
    • Repair of the structural decking or replacement if not salvageable
    • Installation of a new layer of roofing
    • Commercial flat roofing inspection for water permeation (if necessary)

    Commercial Roofing Contractors You Can Trust

    If you’re in need of a commercial roofing replacement job, that means your roof is keeping out the elements or may even present a threat to you and your workers. Leaks in your roof can damage products and workspaces while structural issues can lead to falling debris or even threaten a total collapse; it’s critical that you get a commercial roof replacement as soon as possible. 

    Replacing your roof can be a high-stress situation – the last thing you need is to have a less-than-honest commercial roofing company try and take advantage.  

    At Dominion, we have a track record 100-years long of treating clients fairly and delivering high quality work. 

    We pride ourselves on honesty, transparency, and no-nonsense billing and invoices. 

    Commercial Flat Roof Replacement Specialists

    Many commercial roofs are flat roofs. Contractors need to take a unique approach and attention to detail when it comes to water displacement for flat roofs. 

    Flat roofs, due to their design, are less able to displace water compared to sloped roofs. To account for this you’ll need alternative solutions like scuppers, roof drains, or a drip edge detail. Otherwise water may be able to permeate your roof and damage the interior of your building.

    As commercial flat roofing specialists, we know how to totally replace your roof so that water has no chance of penetrating your roof and causing interior and potentially structural damage. 

    Our commercial roofing replacement services are unrivalled, so when you get a job done by Dominion,  you can rest assured that the job is done right. 

    Your Trusted Commercial Roofing Company 

    Our commercial roofing company is made up of experts and veterans of dozens or even hundreds of jobs; they’ve seen it all and can manage pretty much any commercial roofing job in Toronto.. 

    Types of roofs we specialize in include: 

    • Modified bitumen roofing
    • Built-up Roofing (BUR)

    What Makes Us One of the Best Commercial Roofing Companies in Toronto

    We’ve been in the roofing business for a long time. For the past 100 years, we’ve never lost sight of what made us one of the best commercial roof replacement companies in Toronto: our dedication to you, the customer. 

    Every member of our team has years of experience providing high quality work. As your commercial replacement contractor, you can rely on us to deliver:

    • Courteous and respectful treatment 
    • Detailed information regarding your commercial roof replacement
    • Transparent and clear invoicing + estimates
    • Commercial flat roofing replacement that last, are on time, and on budget

    Commercial Roof Replacement by the Roofing Leaders

    Expert Flat Roofing Toronto

    We are experts on all types of commercial roofing systems; we know commercial buildings – and their roofs – inside and out. 

    Work with a commercial roof replacement company that has a track record over a century long delivering quality jobs for clients. Contact us at Dominion and work with a leading roofing company. 


    113 Cartwright Avenue

    North York, Ontario, M6A 1V4

    PHONE: 416.789.0601

    FAX: 416.781.2049


    Commercial Roof Replacement FAQ

    What is commercial roof replacement?

    Commercial roof replacement is the process of removing the existing roof on a commercial building and installing a new roofing system. This is necessary when your roof is damaged beyond repair and/or has reached the end of its lifespan.

    When should I replace my commercial roof?

    You should consider replacing your commercial roof if you notice signs of significant damage. This can include leaks, water pooling, or visible wear and tear. Roofs typically have a lifespan of 20 to 30 years, so if yours is approaching that age, you should consider having a contractor examine the roof to ensure it’s still functioning as it should.

    How much does it cost to replace a commercial roof?

    The cost of commercial roof replacement will vary depending on a number of factors like the type of roofing material used in the job, the size of your building, initial installation methods, and the type of roof. We’ll always provide an easy-to-understand and accurate quote. 

    What are the most common types of commercial roofing materials?

    Common commercial roofing materials include single-ply membranes (thermoplastic polyolefin orTPO, PVC, EPDM), built-up roofing (BUR), modified bitumen, metal roofing, and asphalt shingles. Office buildings often have different types of roofing material compared to industrial buildings. A commercial flat roof replacement is the most common type of roofing job for businesses.

    Is it essential to obtain permits for commercial roof replacement?

    Yes, obtaining the necessary permits is essential before starting any commercial roof replacement project. Local building codes and regulations may require permits to ensure the work is done safely and meets all standards. The building owner should be able to acquire these permits relatively easily and quickly. 

    How long does a commercial roof replacement typically take?

    The duration of a commercial roof replacement will depend on a number of factors, including the size of the building, weather conditions, and the complexity of the project. Typically, it will take anywhere from a few days to a few weeks.

    Can I expect any tax benefits or incentives for commercial roof replacement?

    In some cases, you may be eligible for tax incentives or deductions for energy-efficient roofing materials or systems. Consult with a tax professional or check local incentives to see if your project qualifies. The City of Toronto, for instance, does provide these incentives.

    What steps should I take to maintain my new commercial roof?

    Regular maintenance is essential to prolonging the life of your new roof. This includes periodic inspections, cleaning debris, and addressing minor issues promptly. Establishing a maintenance schedule with your roofing contractor is always recommended.


    Over a century in the industry...


    Years in

    2+ Million



    Best Warranty
    in the Business

    For more than 100 years, Dominion Roofing has reigned as Brampton's roofing authority. Exceptional products, superior service, renowned innovation, and the highest safety standards has led Dominion to become one of the most trusted Brampton roofing companies.

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