Your Leading Commercial Roof Repair Experts Since 1922

Commercial roof repairs can be complicated – that’s why you need the best. Our commercial roofing team has years of experience repairing all types of damages to all types of roofs. Contact the only commercial roofing Toronto business with over 100 years of success.

Our services

    Get A Quote Now

    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 Repair Experts With Over 100 Years of Success

    Your brick-and-mortar location is your first impression on customers and clients; make sure your commercial roofing is in pristine condition when you work with the commercial roof repair experts at Dominion. Dominion is a commercial roofing company that has been in business for 100 years – we know how to get jobs done right, on time, and on budget. 

    As one of the best commercial roofing companies in Toronto and the GTA, we know all there is to know about any type of commercial roof. 

    Take advantage of a wide range of commercial roofing services, including: 

    • Commercial roof repairs
    • Emergency roof repairs
    • Roofing inspection
    • Commercial roof replacement

    Commercial Roofing Contractors You Can Trust

    If you’re in need of a commercial roofing repair job, that means that your roof is no longer doing its job. From leaks in your roof that can damage your products and workspace to more serious structural issues that endangers you and your workers, it’s critical that you get a commercial roof replacement or repair as soon as possible. 

    But in these high-stress situations, the last thing you need is to have your precarious situation taken advantage of by less-than-honest commercial roofing companies. 

    Instead, work with one of the leading commercial flat roofing contractors with over 100 years of success in the business.

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

    Commercial Flat Roofing Specialists

    Many commercial roofs are flat roofs, requiring a specialized approach and attention to detail when it comes to water displacement. 

    Flat roofs are less able to displace water compared to sloped roofs. To supplement your flat roof, you’ll need alternative solutions like scuppers, roof drains, or a drip edge detail. Otherwise water may be able to permeate your roof and cause interior and structural damage. 

    As commercial flat roofing specialists, we know how to repair your roof so that water has zero chance of seeping through and damaging the interior of your business. 

    Our commercial roofing services are second to none, so when you get a job done by Dominion,  you can rest assured that the job is done right. 

    Commercial Roof Replacement

    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 Company That Can Handle Any Type of Commercial Roof

    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 roof in Toronto. 

    Types of roofs we specialize in include: 

    • Modified bitumen roll roof
    • Built-up Roofing (BUR)

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

    We’ve been doing this for a long time. Over the past 100 years, we’ve never lost sight of what made us one of the best commercial roofing companies in Toronto: our dedication to our customers. 

    We don’t rest until we’re able to solve every single one of your roofing issues (even the ones you may not notice). 

    Every member of our commercial roofing team has years of experience delivering high quality work. As your commercial roofing contractor, you can count on our entire team delivering:

    • Courteous and respectful treatment at all times
    • Detailed information about the job
    • Transparent and clear invoicing and estimates
    • Complete dedication until the job is done
    • Commercial flat roofing replacement that last
    • Commercial flat roofing repair jobs that are on time, on budget, and done right

    Two Ply Roofing Systems

    Two-ply roofing systems consist of a pair of modified bitumen membrane layers designed to safeguard your building. Typically, these layers are affixed atop a protective board, which sits on the deck.

    The recent breakthrough in two-ply systems lies in the introduction of self-adhering membranes. This innovation permits installers to minimize the use of heat during the roofing product application process. This enhancement offers added security, especially in vulnerable areas like walls and doorways.

    Flat Roofing Toronto

    They provide two-ply systems suitable for various types of decks. For instance, on concrete decks or aging wooden structures, you have the option to either “mop” or utilize hot asphalt to bond the base layer to the deck.

    Subsequently, you can apply a torch-applied cap sheet as the top layer. This approach not only reduces the overall roof weight compared to conventional four-ply asphalt systems but also facilitates potentially simpler repairs and replacements in the future.

    Four Ply Roofing Systems

    Four-ply roofing systems involve the use of four layers of felt paper, each securely sealed with hot asphalt. These layers are applied in a continuous, overlapping fashion. To shield them from the sun and deter deterioration, they are subsequently coated with gravel, which serves as a reflective layer.

    Commercial Roof Repair in the GTA You Can Trust

    Expert Flat Roofing TorontoIf you want to work with a commercial roof repair company that has a track record over a century long delivering quality jobs for clients, then contact us at Dominion Commercial Roofing Contractors today.


    113 Cartwright Avenue

    North York, Ontario, M6A 1V4

    PHONE: 416.789.0601

    FAX: 416.781.2049


    Commercial Roof Repair FAQ

    What is commercial roof repair?

    Commercial roof repair refers to the process of fixing damaged or deteriorating roofs on commercial buildings like offices, warehouses, and retail spaces. 

    Why is regular maintenance important for commercial roofs?

    Regular maintenance helps identify and address small issues before they become major problems, extending the lifespan of your commercial roof and reducing repair costs.

    How can I tell if my commercial roof needs repair?

    If you’re noticing water stains on ceilings, visible damage on the roof’s surface, leaks, and unexplained energy bill increases, then it’s a good idea to schedule a professional inspection. 

    What are common causes of commercial roof damage?

    Common causes of damage include: weather exposure (rain, hail, wind), poor installation, lack of maintenance, and aging materials.

    Can I repair my commercial roof myself?

    Generally no. Not only are you likely to miss something a commercial roofing contractor in Toronto would identify and fix, but you may even cause further damage and void warranties without the knowledge and experience working with commercial roofing. 

    How much does commercial roof repair cost? How much does a commercial roofing contractor charge? 

    Costs vary based on the extent of damage, roof type, and materials used. At Dominion, you’ll always receive a no-obligation quote before any work begins. 

    Are there eco-friendly options for commercial roof repairs?

    Yes, there are eco-friendly roofing materials and repair methods. These include cool roofs and green roofing systems, which can improve energy efficiency and sustainability.

    How long does a commercial roof repair typically take?

    Repair times depend on the scope of the project and the commercial roofing company doing the job. Minor repairs may take a few hours; larger jobs could take several days. Your commercial roofing contractor will provide a timeframe.

    How can I find a reliable commercial roof repair contractor?

    Check for proper licensing and insurance, experience in commercial roofing, and positive customer reviews, in addition to the overall reputation of the company. Try and get referrals from other businesses if possible.

    Can I prevent future commercial roof issues?

    Absolutely. Regular maintenance and inspections can help prevent future issues and save you a lot of money on commercial roof repairs in the future by catching problems early. Additionally, consider investing in roof coatings or reflective roofing materials to prolong the roof’s life.


    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.

    What Our Clients Say

      Sorry, no posts matched your criteria.
    Burlington | Brampton | Etobicoke | Markham | Mississauga | North York | Oakville | Richmond Hill | Scarborough | Vaughan