For nearly five decades, Watertite Roofing has been the go-to company for commercial flat roofing services in Simcoe, Ontario. We offer flat roof installations, repairs, retrofits, and replacements for commercial buildings and industrial facilities.
Owners of industrial facilities and other commercial properties in Simcoe know how unpredictable Ontario’s weather can be. Heavy snow, strong winds, and extreme temperature fluctuations constantly put pressure on flat roofing systems. That’s why you need a trusted contractor who can respond quickly when roofing issues arise.
Watertite Roofing is a BBB-accredited company known for offering dependable emergency repairs and long-lasting flat roofing solutions. This consistent support is the reason many property managers choose our commercial and industrial roofing services every time.
Most large buildings in Simcoe and across Ontario, including schools, apartment complexes, shopping centres, factories, and government facilities, are built with flat or low-slope roofs. These roofing systems are cost-effective and allow for practical use of the extra rooftop space.
At Watertite Roofing, we handle commercial flat roof installations, repairs, retrofits, and scheduled inspections. Whether you need urgent leak repairs or expert advice on whether your current roof should be replaced, you can rely on our clear assessments and professional service.
Our commercial roofing specialists recommend trusted and proven materials for all Simcoe commercial roofing projects. We often install Duro-Last PVC flat roofing systems, one of the top-rated roofing membranes in North America.
Duro-Last membranes are strong, flexible, and ideal for a wide range of commercial properties. They can also be retrofitted on existing flat or low-slope roofs if the roof deck and insulation are in good condition.
Additionally, we install high-quality, Canadian-made roofing systems through our partnership with Goliath Roofing Systems. With Watertite Roofing, you’ll get durable roofing materials designed for long-term performance.
Every aspect of our client’s commercial roofing project is completed by our in-house team of trained and certified roofers. We do not subcontract or outsource work to a third party. This allows us to maintain strict control over workmanship, construction safety, and service quality.
Our roofing professionals also participate in ongoing technical training. This ensures they remain familiar with the latest roofing technologies, cleaner installation methods, and current commercial roofing and maintenance standards.
We provide strong warranty protection for every commercial flat roofing system we install or repair across Simcoe and Southern Ontario. Watertite Roofing proudly offers 15–20 year materials and labour system warranties directly from our trusted roofing manufacturers, including Duro-Last and the Canada-made Goliath Roofing System. These manufacturer-supported warranties apply to approved PVC roofing membranes and high-quality flat roof installations, including retrofit and overlay systems. In addition to these system warranties, we also provide workmanship coverage on eligible commercial and industrial roofing projects, ensuring reliable protection and long-term performance.
Our warranty coverage is designed to protect clients from premature issues such as leaks, membrane failure, or weather-related damage—offering businesses confidence and peace of mind in the durability of their flat roofs. Our skilled professionals will review all warranty terms with you in detail so you fully understand the level of protection, the lifespan expectations, and the long-term value of your roofing investment.
Watertite Roofing – Specialists in Flat Roofing Since 1976 has earned unmatched recognition for consistent craftsmanship, customer satisfaction, and technical expertise in commercial roofing. We proudly hold an A+ rating with the Better Business Bureau and have achieved Duro-Last Elite Contractor status—an honour awarded to only a select group of top-performing roofing companies across North America. Our commitment to excellence has also earned us the Ontario Contractor of the Year award multiple times.
Additionally, in 2024 our community and local Chamber of Commerce voted Watertite Roofing Business of the Year and Employer of the Year, reflecting not only the quality of our roofing services but also the professionalism, integrity, and dedication of our entire team. These achievements demonstrate our ongoing commitment to delivering high-quality, reliable, industry-leading roofing solutions across Ontario.
Every residential, institutional, or commercial building has unique flat roofing features. That’s why we tailor our roofing services to meet your specific flat roofing needs. We begin by assessing your roof’s structure, drainage, insulation, and long-term needs before recommending roof repairs, retrofit, or complete replacement. Here are the top services we provide in Simcoe, Ontario.
Installing a commercial roofing system is a complex process that requires expertise and extensive experience. You need a skilled flat roof installer who can help choose the best PVC roofing membrane and install it properly to prevent water pooling, seam loosening, and premature UV degradation. Luckily, Watertite Roofing can help.
Our company has been offering flat roof installation services since 1976. Over the years, we have acquired cutting-edge roofing equipment, assembled a team of highly experienced roofing professionals, and partnered with Duro-Last and the Canada-made Goliath roof system; top manufacturers of PVC roofing membranes.
Therefore, Simcoe residents can count on us for reliable commercial and residential roofing services.
It takes just one cracked joint, a rusty screw, or a loose seam to spring a leak on a flat roof. If you don’t get the issue fixed on time, soon you’ll be patching up extensive leaks and other forms of roof damage. Over time, inefficient repairs or improper maintenance can lead to roof rot, severe leaks, widespread property damage, and disruptions to your operations.
At Watertite Roofing, we perform thorough roof inspections to assess the extent of your roof’s damage and then recommend effective repairs. Whether you’re dealing with a bubbling roofing membrane, clogged drains, or minor roof leaks, our roofers will assess your roof and recommend cost-effective roof repairs.
Don’t subject yourself to worries related to roofing emergencies. That minor leak today may easily escalate and lead to extensive damage in the future. Remember, our flat roof repair services are available regardless of the day or time. Contact us and schedule roof repair services to restore the efficiency of your business property’s roof.
Commercial flat roof retrofits are one of the most practical and cost-effective ways to extend the life of an existing roofing system without the expense of a full roof replacement. At Watertite Roofing, our skilled professionals assess the condition of your roof deck and insulation to determine whether a retrofit or overlay installation is the right solution. When the underlying structure is dry and structurally sound, we can install a new high-performance PVC roofing system—such as Duro-Last or the Canada-made Goliath Roofing System—directly over the existing flat roof. This process preserves valuable insulation, lowers material and labour costs, and significantly reduces disruptions to your business operations.
Retrofit installations offer excellent durability and energy efficiency, making them an ideal choice for commercial and industrial properties across Ontario. With proper installation by our experienced team, PVC systems deliver long-term protection against leaks, UV exposure, freeze-thaw cycles, and storm damage, all while supporting strong manufacturer-backed warranties. To maximize the lifespan of your roofing investment, our roofing services also include regular maintenance, routine inspections, leak detection, debris removal, and timely repairs. Preventive maintenance improves energy efficiency, ensures reliable drainage, and helps your flat roof perform at its best throughout the year—keeping your property protected and your operations running smoothly.
Duro-Last and the Canada-made Goliath Roofing System are two of the leading single-ply PVC membranes used in commercial flat roofing across Ontario. Both manufacturers provide high-quality materials ideal for commercial, industrial, and large flat roof applications. At Watertite Roofing – Specialists in Flat Roofing Since 1976, we recommend these PVC systems for their performance, durability, and long-term value for commercial properties.
Watertite Roofing helps businesses and commercial property owners source custom-fabricated PVC roofing membranes from Duro-Last, ensuring precise fit and enhanced performance. Duro-Last’s factory-controlled custom cutting eliminates up to 85% of installation seams, which reduces on-site welding and shortens installation time. Fewer seams mean fewer potential leak points—resulting in a more reliable, long-lasting flat roof.
The Goliath Roofing System also offers high-quality PVC membranes designed for commercial installations and retrofit/overlay applications. Goliath’s consistent manufacturing process ensures strong seams, durable protection, and dependable performance for large-scale roofing projects.
Both Duro-Last and the Goliath Roofing System offer bright, highly reflective PVC membranes designed to reduce heat absorption during hot summer months. Duro-Last is recognized by the EPA’s ENERGY STAR® Roof Products Program for having one of the highest retained reflectivity ratings in the roofing industry. This reflective surface reduces strain on cooling systems and helps lower energy costs for commercial and industrial buildings.
Goliath Roofing Systems also provide excellent solar reflectivity and UV protection, helping improve energy efficiency and indoor comfort across facilities in Tillsonburg, Simcoe, London, St. Thomas, and the surrounding Ontario region.
The Duro-Last PVC membrane is engineered using a proprietary thermoplastic formulation containing PVC resins, stabilizers, UV absorbers, flame retardants, and a strong weft-inserted scrim. This composition offers exceptional resistance to harsh weather, chemicals, fire, grease, UV radiation, and temperature fluctuations—making it an excellent choice for commercial roofing.
Similarly, the Goliath Roofing System, manufactured in Canada, provides superior strength and long-term durability. Its reinforced PVC construction withstands high winds, freeze-thaw cycles, ponding water, and other demanding conditions common to Ontario’s climate. With proper maintenance, both Goliath and Duro-Last systems offer decades of reliable performance.
Watertite Roofing is a Duro-Last Elite Contractor, a distinction awarded to only a select group of roofing contractors across North America for exceptional installation quality and customer satisfaction. Our experienced, fully insured roofing professionals follow a clean, safe, and efficient installation process—free of loud machinery and unnecessary disruptions.
When the underlying roof deck and insulation remain structurally sound, our team can install a new Duro-Last or Goliath PVC membrane over the existing system as part of a flat roof retrofit or overlay installation. This eliminates costly tear-offs, reduces labour time, and preserves valuable insulation—while still qualifying for manufacturer-supported warranties of 15–20 years on materials and labour.
Watertite Roofing proudly installs the Goliath Roofing System, a premium PVC membrane owned and manufactured locally in Cambridge, Ontario. By choosing Goliath, businesses directly support a Canadian company that employs local tradespeople, production workers, and technical staff—strengthening our regional economy and creating jobs within our communities.
Selecting a locally manufactured roofing system not only ensures high-quality materials built for Ontario’s climate but also reinforces community growth, sustainability, and long-term economic development. When you invest in a Goliath flat roofing system, you’re investing in local innovation, local manufacturing, and the future of commercial roofing in Ontario.
The exact cost of commercial flat or low-slope roof installation, repair, or full replacement in Simcoe depends on several key factors. Material selection plays a major role in pricing. For example, single-ply PVC membranes—such as Duro-Last and Goliath Roofing Systems manufactured by CGT (Canadian General Tower)—are generally more affordable and efficient to install compared to traditional built-up or modified bituminous flat roofing systems.
The cost of flat roofing in Simcoe varies widely depending on your preferred roof system, the complexity of your roofing project, and other factors. Here are the estimated system costs for commercial flat roofing in Simcoe:
| Type of flat roofing option | Average system cost per square foot |
| EPDM | $4 to $12 |
| PVC | $7 to $12 |
| TPO | $7 to $12 |
| Modified bitumen | $8 to $14 |
| Asphalt & gravel built-up-roofing (BUR) | $10 to $20 |
Extensive membrane bubbling and other complex issues may require costlier repairs than unclogging roof drains or fixing a minor leak. If water or excess moisture has infiltrated the roof insulation, there could be structural damage, which will increase the cost of repairs or replacement.
If the roof deck is severely damaged, our team may recommend a complete roof replacement, in order to expose the roof deck and make all necessary repairs to it. This will significantly increase the project’s cost.
If you’re looking for a commercial flat roofing contractor you can trust, schedule a free, initial consultation and talk to our professional roofers about your unique project. We take the time to understand your roofing needs and recommend cost-effective solutions: no upselling or shortcuts.
With our professional roofers, you can expect quick response, unmatched commercial flat roofing expertise, and services that exceed your expectations. Contact us today and schedule an initial consultation.
This approach avoids a full tear-off and creates a watertight, energy-efficient, and long-lasting protective layer.
2. Faster, Less Disruptive Installation
Because the old roofing system stays in place, installation is quicker and quieter—ideal for busy facilities such as factories, warehouses, offices, retail stores, and medical buildings.
3. Added Insulation & Energy Efficiency
A retrofit often includes new insulation or cover boards, improving R-value, reducing heat loss, and lowering your heating and cooling costs.
4. Enhanced Waterproofing & Leak Protection
Installing a new PVC membrane overtop creates a seamless, durable barrier that eliminates many common leak points found in aging metal or older membrane roofs.
5. Extends the Roof’s Service Life
A retrofit gives your building a brand-new flat roofing system without the expense of a full replacement—adding years or even decades of performance and protection.
6. Environmentally Friendly
By leaving the existing roof in place, you greatly reduce the amount of waste sent to landfills.
These PVC flat roofing membranes feature highly reflective surfaces that help reduce heat absorption during the hot summer months—improving indoor comfort and lowering energy costs. They also stand up exceptionally well to UV radiation, temperature fluctuations, ponding water, and the wear associated with low-slope commercial roofing.
With decades of proven performance, both Duro-Last and Goliath flat roofing systems provide the strength, reliability, and longevity that Ontario businesses depend on. As trusted, certified installers, Watertite Roofing ensures your commercial, industrial, or institutional property receives a high-quality flat roof system built to last.
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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