At Watertite Roofing, we specialize in top-quality metallic roof retrofit solutions throughout Ontario. We help upgrade aging roofs and improve the energy efficiency of existing low-slope metal roofs.
Upgrade your old roof into a code-compliant roof assembly that’s durable, energy-efficient, and aesthetically pleasing with our retrofit roofing services.
Watertite Roofing has been retrofitting metal roofs since 1976 and has become Ontario’s trusted specialist in roofing solutions. Our success is rooted in professional roof installations, uncompromising workmanship, and a client-first approach that consistently delivers top-quality roofs for our residential and commercial clients.
Over the decades, we have completed more than 6,700 roofing projects, earned an A+ BBB rating, and maintained a 4.9-star average rating on Google reviews. More than 78% of our clients return or refer us to other property owners, which is proof of the confidence Ontario property owners have in our services.
Therefore, if you need a new roof or intend to retrofit a metal roof for your residential, industrial, institutional, or commercial property, contact us. Here’s why Ontario building owners choose our retrofit roofing services.
The journey of every retrofit or new metal roof installation project we undertake begins with establishing a strong and professional relationship with our client. We listen to your needs and understand that your residential or commercial roof is a significant investment in terms of finance, security, and comfort.
Next, we customize our services to match your roofing needs, support your aspirations, and address your concerns. Therefore, when you choose our team to correct performance issues related to your metal roof, rest assured of the following;
At Watertite Roofing, quality workmanship is our signature. Our unwavering dedication to offering high-performance roof retrofits is evident in every metal sheet cut, fastener, and every seam we seal. We combine our roofing knowledge and skills with high-quality materials, such as the Duro-Last roofing system or other quality Canada-made retrofit roofing systems. We never use out-of-date materials.
The result is an economical and functional solution for Ontario building owners with low slope-metal roof assemblies in need of roof repairs or replacement.
Our team comprises certified design professionals and roof installers handpicked for their expertise in commercial and industrial roofing, skills, and commitment to excellence. Therefore, every roof installation, retrofit, repair, or replacement task is completed to code and exceeds our client’s expectations.
If you have an aging roof that needs to be retrofitted, contact us. Our team will assess the condition of your existing roof and determine the roof assemblies structural integrity. We only proceed with a retrofit if the existing structure is strong enough to support a new roof assembly.
Metal roofs are associated with lower initial installation costs and durability. However, that doesn’t factor in protection from rust, corrosion, temperature extremes, and exposure to weather elements. All these issues can compromise the structural integrity of your metal roof. If you have seen signs that time has caught up to your metal roof, contact Watertite Roofing.
You don’t have to live with the ongoing challenges of a failing roof to extend its service life. Leaks, rust spots, loose fasteners, and visible wear can quickly escalate into costly structural problems if left unchecked. For instance, moisture and water infiltration can cause mold growth within your building. Thus, addressing these warning signs early ensures your property remains protected and efficient.
Sometimes, repairing your existing roof may not be enough to prevent leaks or other forms of damage. That is where our retrofit services provide real value. Our roofing experts install a Duro-Last retrofit roofing system directly over your existing metal roof.
During retrofitting, a new roof is installed directly on your existing roof. This eliminates the need for a complete tear-off and allows us to install a new metal roof that is watertight, energy-efficient, and built for long-term performance. This approach saves on upfront installation costs and minimizes disruption to your business or daily operations.
Here’s why we recommend the Duro-Last retrofit systems for metal roofs in Ontario.
One of the most common problems with traditional metal roofs is the seams and exposed fasteners, which are vulnerable to leaks, rust, and long-term wear. With Duro-Last systems, we can help building owners order custom-sized sheets that are custom-fabricated to your roof’s exact dimensions. This minimizes field-welded seams and creates a watertight metal roof surface.
At Watertite Roofing, our long-standing partnership with Duro-Last ensures every roof retrofit is done with materials known for precision engineering and long-term performance.
With the Duro-Last retrofit system, we completely encapsulate your metal roof with a monolithic, PVC flat and low-slope roof membrane, permanently sealing off all the troublesome leaking fasteners and roof seams of your old metal roof. Therefore, we can recommend the best retrofit roofing system for your building.
Retrofitting a metal roof with the Duro-Last retrofit system is one of the most cost-effective ways to upgrade your property’s metal roof. Instead of a complete tear-off and replacement, we install a new Duro-Last® roof assembly over the existing roof structure. This streamlined process reduces waste, saves time, and eliminates many of the expenses associated with traditional roof replacement.
Installing the Duro-Last roof retrofit system over the existing roof substrate eliminates the expense of tearing off and disposing of existing roof materials. This also reduces the need to purchase new insulation and vapor retardant membranes. Thus, you can make significant savings on your re-roofing budget for an existing building.
Retrofit installations are faster and more efficient than full roof replacements. No extensive roof tear-off is necessary. This reduces the required labor hours, which lowers overall project costs while keeping your roofing upgrade on schedule. Therefore, the labor cost of retrofit systems is lower than that of a full replacement of an existing metal roof.
For commercial and industrial properties, downtime can be costly. Retrofitting old and new roofs reduces noise, debris, and disruption to your activities. This allows business operations and building occupants to continue with minimal interruption. Thus, you can expect fewer productivity losses and less risk of revenue disruption compared to time-consuming roof replacement projects.
A Duro-Last PVC membrane metal retrofit system is insulated by installing a layer of high-quality, energy-efficient insulation boards directly over the existing metal roof before the membrane is applied. This insulation fills the gaps between metal ribs and creates a flat, continuous surface that eliminates the thermal bridging common in exposed metal roofing. By reducing air leakage and minimizing heat transfer, the insulated system keeps indoor spaces cooler in the summer and warmer in the winter, lowering heating and cooling demands. Combined with the reflective, white Duro-Last PVC membrane, which deflects a significant portion of the sun’s heat, the system enhances overall energy efficiency, improves indoor comfort, and reduces long-term HVAC costs.
Furthermore, the reflective properties of Duro-Last retrofit systems ensure higher energy efficiency by cutting energy consumption and extending the life of HVAC equipment. Whether you want to retrofit an existing commercial or residential sloped or flat roof, Watertite Roofing is here to help you benefit from Duro-Last® roofing solutions.
Durability is at the core of every Duro-Last metal retrofit system. The Duro-Last metal retrofit roof systems are engineered to ensure watertight protection and resist the common issues that shorten the lifespan of traditional metal roofs. They have hidden fasteners and a monolithic functionality which guarantee superior performance against rain, snow, and temperature extremes.
The combination of structural strength, efficient insulation, and reflective surfaces ensures that your roof is built to last for decades with minimal maintenance. Thus, retrofitting an existing roof is an economical and functional solution for property owners.
Your choice will depend on the condition of your existing roof and the nature or extent of the damage. Surface damage, such as rusting, may be fixed by installing a new metal roof on the existing structure. However, extensive deterioration of the existing roof and underlying structure may necessitate a complete replacement.
Pre-engineered steel commercial structures with metallic roofs gained popularity in Ontario in the 1970s. In most cases, the type of roofs installed on these structures was considered ‘screw-down’ metallic roofs. They offer lasting protection against the weather because of their durability and resistance to weather-related damage.
Fast-forward five decades, and these early ‘screw-down’ metallic roofs are beginning to show signs of extensive wear and failure. This signals the end of the roof’s useful life. Leaks may be occurring frequently, or you have noticed other signs of damage. So, should you repair, retrofit, or replace the existing commercial sloped or flat roof? Here’s what to keep in mind.
Before you schedule repairs for your roof, consider the fact that the roof will continue to deteriorate due to natural wear and tear. At some point, you’ll need to replace it. Think about the money spent on repairs and compare it to the cost of retrofitting or replacing it.
In addition, the insulation layers and other materials beneath your metal roof may also get damaged if roof issues like moisture infiltration and leaks aren’t addressed. Serious damage to the underlying structure may necessitate a complete roof replacement.
If your metal roof is severely damaged and repairs can’t restore efficiency, you can either retrofit the existing roof or invest in a complete roof replacement. Both options require careful consideration of costs, long-term benefits, and how each option aligns with your property’s future use.
Retrofitting can extend the life of an existing roof at a lower cost than full replacement, while replacement offers the assurance of a completely new system. The table below highlights the key differences to help you evaluate which option is best for your building.
| Roof Retrofit | Roof Replacement |
| Requires less upfront capital than a full replacement to restore your roof’s efficiency. | Requires a large upfront investment but ensures complete peace of mind and long-term performance. |
| Can increase the resale value of the building. | May result in a higher resale value due to the new roof system. |
| Reduces short-term maintenance costs by reducing the frequency of repairs. | Minimal maintenance is required, and this frees up budget for other priorities. |
| Utilizes existing roof structure and reduces waste while saving on materials and labor. | Requires complete roof tear and replacement. This could take time and other resources. |
| Energy performance improvements depend on the retrofit system selected. | May qualify for local energy rebates due to efficiency upgrades. |
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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