We're a trusted flat roofing contractor that combines premium roofing materials and 50 years of industry experience to offer cost-effective flat & low-slope roof repairs in Ontario.
For over 50 years, we have been helping Ontario residential, industrial, and commercial building owners install, repair, and replace flat and low-slope roofs.
Flat and low-slope roofs are popular roofing systems for residential, industrial, and commercial buildings. They’re often an affordable roofing option that’s energy efficient. With proper maintenance, these roofs can last many decades. However, it’s important that you get an experienced roofing contractor to perform regular inspections to identify potential leaks, cracks, and other forms of damage.
A thorough roof inspection can help catch the earliest signs of roof damage and fix them. That’s exactly what we do for homeowners and commercial property owners in Ontario. Here’s why our industrial, commercial, and residential roofing solutions are widely preferred and highly rated across the province.
There’s a lot to keep track of when managing a home, industrial facility, or commercial building. One of the most important tasks is keeping the existing roofing system in good condition. At Watertite Roofing, we offer flat and low-slope roof repair services that give property owners in Ontario peace of mind.
Flat roofs are common across Canada and are valued for their practicality in residential, commercial, and industrial buildings. However, Ontario’s harsh winters, freeze-thaw cycles, and heavy rainfall can take a toll on the roofing membrane.
Our regular roof inspections and timely repairs can prevent leaks, extend the lifespan of your roof, prevent expensive emergencies, and ensure your roof meets all relevant building codes. When signs of structural damage begin to show, it quickly becomes a race against time.
Ignoring problems such as roof leaks, ponding water, blistering membranes, weak seams, or clogged drainage can lead to roofing issues such as;
Whether your roof is showing early signs of wear or has developed serious leaks, our certified team is ready to deliver safe, effective, and lasting repairs. Remember, we’ll first inspect your roof, assess the nature and extent of damage, and recommend the right targeted repairs to restore your roof’s efficiency.
Watertite Roofing provides reliable repair, regular maintenance, and affordable roof replacement solutions for flat and low-slope roofing systems across Ontario. We work with residential, commercial, and industrial clients to ensure they enjoy the energy savings, efficiency, and durability of low-slope and flat roofs. You can count on us for the following services.
A well-maintained roof is essential for keeping your home safe, dry, and comfortable. Yet even the best residential flat or low-slope roofs do not last forever. Over time, they are exposed to natural wear and tear, weather extremes, and other external factors that cause deterioration.
Older roofing materials often lose their effectiveness against water and temperature changes. Poor workmanship during the original roof installation can also accelerate damage, leading to weak points that allow moisture to infiltrate your home.
General wear-and-tear, combined with improper maintenance, could cause membrane blisters, cracks, or weakened seams. Ontario’s weather adds another layer of stress to flat roofs, with heavy snow loads, hail, and freezing temperatures that cause flat roofs to expand and contract frequently. In some cases, external damage may come from pests, wildlife, or even vandalism.
If these issues are ignored, roofing problems can quickly escalate into costly repairs. Minor roof leaks can spread into ceilings, damage insulation, and encourage mold growth. What could have been a minor repair may evolve into a costly structural concern that could necessitate a complete roof replacement.
At Watertite Roofing, our team provides effective repairs to fix the earliest signs of roof damage. Each roof repair begins with thorough inspections to identify problem areas and apply long-lasting repairs using proven materials.
A commercial property needs a functioning flat roof. This should be a durable roofing system that protects both the building and the operations inside. Unfortunately, commercial flat roofs don’t last forever and often require professional repair to extend their life expectancy.
Over time, exposure to Ontario’s shifting weather weakens membranes, seams, and flashing. Drainage problems can cause standing water, and minor leaks may go unnoticed until they affect offices, retail spaces, or storage areas. Unlike residential roofs, commercial flat roofs often cover much larger surface areas, which means that localized problems like seam separation or punctures can spread quickly if not fixed on time.
Even small roof issues, if ignored, can disrupt your day-to-day operations. For instance, a seemingly minor leak may damage stock, cause your HVAC unit to overwork to maintain optimal indoor temperature, or create unsafe working conditions for staff due to mold growth. In severe cases, businesses may face downtime or closures to address extensive roof failures.
At Watertite Roofing, we understand that commercial flat roofs, rarely fail at once. Earliest signs of damage often appear at the seams, drains, or penetrations, not across the entire surface. That’s why we recommend letting our experienced roofing professionals inspect your roof.
We help address minor flat roof concerns early to prevent extensive structural problems, mold growth, and costly emergency shutdowns. Whether you own a retail plaza, manage office buildings, or operate institutional facilities, our repair services are tailored to your property’s unique demands. Contact us and request a free quote.
Industrial buildings require specialized roofing knowledge and top-quality materials. These structures often house heavy equipment, valuable inventory, and sensitive operations, making their roof maintenance critical.
Considering their roofs are large and complex, you need a specialized industrial flat roofing contractor. The roofing company must have been in the roofing industry long enough to understand the different materials used for these roofs and take no chances with repairs.
Industrial flat roofs are often exposed to chemicals, harsh weather, and heavy foot traffic. Over time, these issues can lead to leaks, weakened seams, or even structural concerns if not addressed on time.
Cracks and weakened seams can lead to water infiltration, compromising production areas, damaging machinery, and halting operations. Severe weather conditions, such as high winds, hail, and heavy snowfall, also leave industrial properties vulnerable to sudden damage. Routine inspections are therefore essential for identifying early signs of trouble before they escalate.
Watertite Roofing provides industrial clients with comprehensive repair solutions. We quickly inspect and fix leaks, restore storm-damaged sections, and offer custom roof maintenance programs designed for long-term performance. Our team combines technical expertise with over 50 years of roofing experience to ensure that your industrial roof remains reliable, safe, and efficient year-round.
At Watertite Roofing, we understand that each residential, commercial, and industrial building is unique. That’s why we carefully match each roof repair or installation project with the most suitable roofing material. For example, modified bitumen roofing is a proven choice for durability and flexibility, particularly in colder climates.
EPDM roofing, while affordable, is more vulnerable to punctures and seams compared to other roofing options, making it less ideal for high-traffic or complex roofs. TPO roofing is valued for its energy efficiency and reflective surface, while built-up roofing (BUR) offers strength through multiple layers of asphalt and fabric, but is heavier and requires more maintenance.
Each roofing system has its advantages and limitations. You can rely on our team to assess your property’s roofing needs, whether residential, commercial, or industrial, before recommending the best repairs or roof replacement option.
Like all other roof types, flat and low-slope roofs are prone to ponding water, leaks, flashing damage, and cracking. The specific repairs needed for your roof will depend on the nature and extent of roof damage.
Fixing minor leaks, patching small cracks, and other minor repairs are relatively inexpensive. You may pay $300 to $2,000, depending on the materials needed and labor hours needed. In cases where there’s extensive damage to your roof, the cost of repairs may exceed $5,000.
Other cost factors include;
The overall size of your roof will directly affect the final cost of repairs. Larger roofs require more materials, extra labor hours, and longer project timelines, which all contribute to higher expenses.
The type of roofing system installed also plays a major role in determining the cost of repairs. Some materials are more affordable to patch or replace, while others require specialized skills or tools, raising the overall price. Below is a general overview of various flat roofing system membrane costs.
| Roofing Material | Cost per sq.ft. (w/o labour) |
| Ethylene Propylene Diene Monomer (EPDM) Roofing | $0.50 to $2.50 |
| Thermoplastic polyolefin (TPO) Roofing | $1.00 to $2.50 |
| Polyvinyl chloride (PVC) Roofing | $1.10 to $2.50 |
| Modified Bitumen Roofing | $0.70 to $2.20 |
| Asphalt & Gravel Built-Up-Roofing (BUR) | $1.50 to $2.70 |
Labor costs for roof repairs vary widely across Ontario, with urban centers like Toronto generally being more expensive. On average, professional roofing labor ranges between $50 and $100 per hour. More complex repairs, such as extensive leak repair or replacement of flashing, require additional time and expertise, which increases the overall repair bill.
Contact us. At Watertite Roofing, we offer timely and effective roof inspections and repairs to protect your property’s roof structure from weather-related damage. Our services include routine inspections, scheduled maintenance, and responsive flat roof repairs whenever you need them.
Note that we often recommend top-quality roofing materials such as Duro-Last roofing systems for extensive roof repairs and full replacements.
In the roofing industry, there are times when flat low slope roof repairs alone are not enough to extend the life of an aging system. After a thorough roof inspection, a contractor may find that issues such as standing water, storm damage, or deteriorating roofing materials on an existing roof have advanced to the point where constant patchwork will not prevent leaks or protect the roof structure. For many building owners, the idea of a full roof replacement—whether on a commercial building, a gravel flat roof, or a residential flat roof—can be overwhelming in both cost and disruption. In these cases, Watertite Roofing often recommends a practical middle ground: a Duro-Last PVC membrane overlay system.
Unlike patch repairs, an overlay creates a new roofing system installed directly over the tar and gravel roof, modified bitumen, built up roofing, or even a metal roof without requiring complete tear-off. This approach is especially valuable on low slope roofs where ponding water and foot traffic around HVAC units can accelerate wear. The Duro-Last system uses a polyvinyl chloride (PVC membrane), custom-fabricated to fit each roof, which helps prevent leaks, resists mildew growth, and handles tough weather conditions. Because it is installed without an open flame, it also offers better fire resistance compared to traditional hot-applied systems.
The benefits for building owners and property managers are significant. By avoiding a full tear-off, you eliminate the cost of removing and disposing of old gravel roofs, shingles, or other roofing materials, which can add several dollars per square foot to a roofing job. An overlay often comes in at a fraction of the price of a complete replacement, while still offering a brand- new surface with a long life expectancy and code-compliant performance. In addition, overlays reduce the risk of exposing the building to the elements during installation, minimizing disruptions for commercial or residential roofing clients.
For flat roofing contractors like us, this middle-ground solution provides lasting value to clients. With regular inspections and maintenance, a Duro-Last overlay can perform as reliably as a new roof, extending the life of the roof structure while delivering major cost savings. For many property owners, it’s the ideal balance between temporary repairs and the expense of a full re roof.
Watertite Roofing proudly serves communities across Southern Ontario, delivering expert flat roofing solutions with proven reliability. From St. Catharines to Brantford, Hamilton to Dunnville, our certified team brings decades of experience to every project. We understand local needs and tailor our services for lasting results—whether it’s a repair, replacement, or retrofit. With offices conveniently located, we’re never far when your business needs trusted, high-performance roofing.
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