We offer cost-effective flat roof installation, maintenance, and replacement services to Hamilton’s commercial property owners. We provide a comprehensive warranty on every project we undertake.
Work with Hamilton flat roof installers you can trust. Watertite Roofing is one of the top roofing companies that uses the Goliath roofing system by Canadian General Tower for roof installation, regular maintenance, and replacements. This is a PVC roofing membrane made in Ontario, Canada, and we recommend it for flat roof installations, repairs, and replacements.
Regardless of the complexity of your flat roof project, we can get it completed on time and within your budget.
At Watertite Roofing, we are proud to be recognized year after year for our commitment to flat roofing quality and customer satisfaction. As certified elite contractors and the recipients of our local Chamber of Commerce’s Business of the Year 16+ Employees and Employer of the Year, we’ve built a strong reputation in the flat roofing industry as the go-to contractor for flat roof repair services, installations, and maintenance for commercial buildings in Hamilton.
As recipients of the General’s Award, we’ve been recognized for outstanding achievement in roofing workmanship and customer service. This prestigious recognition was presented during the annual contractor awards gala in Hollywood, California. These and other awards reflect the trust our clients place in us.
Our team installs high-performance flat and sloped roofs backed by some of the strongest warranties in the industry. For instance, you will get a comprehensive warranty on your Goliath PVC membrane for your flat roof.
In addition, we offer one of the best labour warranties in the region, supported by our 48 years of experience in commercial flat roofing. You can count on our roofing materials and quality workmanship for your roof’s durability, value, and peace of mind.
As one of the top roofing contractors in the Niagara Peninsula, we provide full-service flat roofing solutions for commercial developments and construction projects across Hamilton. Our team is ready to help, whether you’re building a new commercial space, replacing an old flat roof system, or looking for long-term maintenance for your commercial roof.
You can count on us for the following flat roofing services.
At Watertite Roofing, we work closely with developers and general contractors to install flat roofing systems for new commercial buildings. From the initial site assessment to the final inspection, our team will manage every step of the project to ensure your schedule and budget stay on track.
Regular inspections are key to identifying and fixing small cracks and other issues to prevent leaks and further deterioration. For instance, inefficient drainage can lead to water pooling. If not addressed in time, depending on the type of roofing system, pooling water can easily seep into the second layer of your roof and cause significant damage.
By identifying and addressing standing water issues and damage associated with UV rays, we help prevent future leaks and extensive damage. After inspection, we’ll provide a comprehensive report that gives a clear view of your roof’s condition. We’ll also help you plan roof repairs or upgrades to protect the underlying structure.
Regular inspections and preventive maintenance are the most effective way to avoid significant and costly repairs. Our service includes inspections, cleaning the roof’s drainage system, and targeted fixes to extend the life of your flat roof. It’s a wise investment in the long-term performance of your commercial property’s flat roof.
Flat roofs are more exposed to harsh weather elements than pitched roofs and more vulnerable to issues like drainage failure and water pooling. Without a steep slope to guide water away (like a pitched roof), even a small blockage or crack can lead to leaks, mould growth, and structural damage. That’s where we come in.
Our team specializes in flat roof repairs to protect your commercial building from structural damage. From emergency repairs to complete membrane restoration, we offer long-lasting solutions tailored to your commercial building’s roof.
Are you dealing with leaks, pooling water, or other flat roofing issues? Our roofers respond quickly, use the right materials, advanced techniques, and years of hands-on experience to ensure your roof gets the quality repairs it needs. Here are our flat roof repair solutions.
Flat roofs often leak around drains, seams, and flashing. This is especially true when the entire roof structure is compromised or isn’t properly installed or maintained. Our team will carefully inspect it to locate the exact source of the leak and seal it using industry-grade roofing sealants or with membrane patches. We also assess nearby areas to ensure the water problem doesn’t recur.
Water that sits on the roof surface for too long can cause leaks and structural issues. It can damage the membrane, promote mould growth, and eventually seep into the building. Our roofers will inspect, unclog, and clean your roof’s drainage.
A proper drainage system can quickly redirect water away from your roof. In some cases, we may recommend a partial redesign to prevent future pooling or the installation of additional drains.
Standing rainwater and debris build-up create the perfect conditions for algae, moss, and mould, which can cause extensive damage to the roofing membrane. Our skilled roofing contractors will remove debris and organic material to keep your roof clean. We can also apply reflective coatings and membranes to prevent damage associated with UV rays and reduce cooling costs, especially during the hot summer months.
Flat roofing systems expand and contract due to temperature changes. Over time, this movement can cause cracks in older or improperly maintained roofs. At Watertite Roofing, we carefully repair small roofing cracks and blisters using durable materials.
Blistering is usually caused by moisture trapped under the membrane or inside the layers of roofing. We will assess whether the damage requires surface repair or full replacement and offer actionable insights.
When a flat roof reaches the end of its service life, we offer complete replacement solutions using durable, high-performance PVC single-ply membrane from Goliath Roofing Systems. Our roof replacement or repair process is designed to limit downtime while ensuring your roof stays functional and efficient for decades.
If damage is beyond repair, we may recommend a new roof to ensure lasting protection for your commercial building. In such cases, we replace the inefficient roof with top-quality roofing material options such as the PVC single-ply membrane from Goliath. We also install all essential components, like metal flashing, to prevent leaks at vulnerable points.
At Watertite Roofing, we aim to ensure your commercial property has a top-quality roof to improve energy efficiency and protect it from water damage. That’s why we recommend the Goliath PVC single-ply roof system. Whether you want a retrofit installation or flat roof replacement, here are the benefits of this PVC flat roof system.
One of the top benefits of the retrofit or overlay installation is that the Goliath PVC membrane will be installed on an existing roof substrate. Thus, there’s no need to incur the extra costs of removing and disposing of old roofing materials. You don’t need to purchase new vapour retardant membranes and insulation materials, which are often more costly than the roofing membranes themselves.
At Watertite Roofing, our go-to choice for a flat roofing option is the PVC single-ply roof membrane from Goliath. It’s renowned for its quality and durability. Our team will install it carefully to extend the life of your current roof and save you the cost of frequent repairs or early flat roof replacement, which is common with other flat roof systems.
Flat roofs can be vulnerable to ponding water and leaks, but not when installed and maintained by Watertite Roofing. Our customized installations and routine inspections ensure excellent roof performance and fix any damage before it affects the structural integrity of your roof.
Indeed, we will design your roof’s drainage correctly, seal every seam with precision, and keep your property’s flat roof functional and energy-efficient. You can use the extra rooftop space in different ways. For instance, you can install solar panels or keep heavy HVAC equipment in the usable space on your roof.
Goliath’s PVC roofing membrane can be customized to match your roof during installation. Our team can help you source custom-sized and fitted PVC sheets to minimize seams on your roof. Custom-fitted roofing accessories may also be available for various aspects of your roof, such as vents, stacks, and roof curbs.
Working with customized and fitted PVC sheets eliminates overlaps and gaps common in traditional flat roof installations. This improves your roof’s overall longevity and performance while reducing the risk of water infiltration. Let our team of skilled roofers manage your flat roof installation, routine maintenance, or replacement project. Contact us today and schedule a free consultation.
Your preferred roofing material and the size are the primary determinants of the total cost of replacing your commercial flat roof. As mentioned, we often recommend Goliath single-ply PVC membranes for flat roof installations and replacements. The average cost of retrofitting the PVC membrane on an existing flat roof is $7 to $ 12 per square foot.
Installing the same PVC (polyvinyl chloride) membrane on an existing metal roof costs between $8 and $14 per square foot, on average. Here are the estimated costs of replacing other flat roof options in Hamilton.
| Roofing Type | Estimated Replacement cost (per sq. foot) |
| Modified bitumen | $8 to $14 |
| TPO (Thermoplastic polyolefin) | $7 to $12 |
| Asphalt & gravel built-up-roofing (BUR) | $10 to $20 |
| PVC (Polyvinyl Chloride) | $7 to $12 |
| EPDM (Ethylene propylene diene monomer) | $4 to $12 |
The cost of servicing or replacing a commercial flat roof can vary widely depending on the following factors.
Labour plays a significant role in determining the total cost of your commercial roof installation, maintenance, or replacement project. Installing or repairing a flat roof can be labour-intensive on taller buildings where access is limited.
Labour costs tend to be higher in urban areas and for complex projects, such as those involving tear-offs or the installation of advanced components like metal flashing or multiple layers of membrane. Request a free estimate, and we’ll provide a detailed quotation that outlines the proper materials for your project, necessary labour hours, and estimated cost.
There are different materials to choose from, each with unique benefits, energy efficiency, and installation requirements. Budget-friendly roofing materials might be more affordable upfront, but may need more frequent maintenance or early replacement. Choosing the right materials suited to the building’s location and structure ensures better performance.
Permits and inspection requirements can also add to your flat roofing project costs. Municipal laws often require paperwork, inspections, and compliance with local building codes. In most cases, your contractor will manage these steps, but the fees and scheduling still affect the timeline and budget.
Similarly, if your project involves removing an old system, expect extra labour and disposal costs. Full removal is often necessary to ensure the roof surface is in the proper condition for repairs and a new roof installation.
Watertite Roofing is one of Hamilton’s leading roofing companies you can trust. Our flat roofing services extend beyond roof installation, maintenance, and replacement. We prioritize our customer experience by matching their roofing requirements with the industry’s top roofing solutions. Indeed, we’ll work closely with you to bring your vision of a high-end commercial flat roof to reality.
Schedule a free consultation today and discuss your flat roof repair or replacement project with a trained, certified, and highly experienced roofer.
Businesses across Southern Ontario rely on Watertite Roofing for reliable flat roofing systems designed to perform under pressure. With decades of trade experience, our certified crews handle repairs, installations, and replacements with precision, always adjusting to the specific needs of each building. We emphasize durability, safety practices, and cost-effective performance, helping owners protect their assets year after year. Thanks to multiple locations, we’re positioned to respond quickly and keep projects moving smoothly. Contact our team to learn more about the solutions available for your property.
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