Flat Roof Replacements

The Go-to Flat Roofing Specialists Since 1976

With an A+ BBB rating and more than 50 years of experience in the roofing industry, Watertite Roofing has become Ontario’s trusted specialist in flat roof installations, repairs, replacements, retrofits, and maintenance services. For property owners, this means working with a roofing contractor that combines proven expertise with modern roofing solutions.

Flat Roofing Materials that Withstand Ontario Weather

From Guelph and Hamilton to Burlington, Brantford, St. Catharines, Niagara Falls, and Fort Erie, Watertite Roofing provides tailored solutions for every roofing need. We understand the diverse flat roof challenges posed by Ontario’s weather and building requirements. That’s why we focus on using the best materials like Duro-Last roof membranes to ensure watertight flat roofs.

Therefore, property owners can rely on us to replace their damaged flat roofs, reduce risks of water damage, and ensure uninterrupted business operations through dependable flat roof replacements and maintenance services.

Trained, Certified, and Experienced Roofers

Our team of certified flat roofing professionals brings decades of combined experience to every project we undertake. We use advanced roofing techniques and the right materials to install, repair, or replace roofing systems to ensure your new roof can withstand Ontario’s toughest weather conditions.

Each member of our team undergoes professional training and a thorough certification process to ensure they can handle roof repairs, installation, maintenance, and replacements successfully. When you choose Watertite Roofing, you partner with roofing experts who understand the critical importance of a leak-free flat roof.

Watertite Roofing is Industry Recognized

Watertite Roofing has built its reputation on consistent results. We have more than 6,700 completed projects, and over 78% of our clients are from referrals or repeat clients. Also, we’re recognized as Ontario’s #1 flat roofing specialist and have maintained a 4.9-star average on Google. Thus, our reputation for quality flat roof repairs, installations, maintenance, and replacement speaks for itself.

Industry recognition has further highlighted our dedication to offering cost-effective flat roof replacements and other roofing solutions. In 2020, we received ongoing service awards and earned the status of Duro-Last Elite Contractors. We also secured the Duro-Last Elite Contractor designation once again in 2023, along with the General Award for Outstanding Achievement in quality workmanship and customer satisfaction.

In 2024, our team was once more honored with the Duro-Last Elite Contractor status and the prestigious General’s Award at the Contractor Awards Gala in Hollywood, California. These milestones reflect our technical expertise in flat roofing and our unwavering commitment to quality and customer trust.

Why Duro-Last and Goliath Roofing Systems for Flat Roof Replacements?

Sometimes, flat roof repairs aren’t enough. When you’re dealing with extensive roof damage, structural damage to the decking, or your roof is old, we may recommend flat roof replacement. Our experienced flat roofing experts will perform a thorough roof inspection to assess the nature and extent of the roof damage. We’ll also recommend repairs, or partial or complete replacement with a Duro-Last or the Canada-made Goliath roof system. Here’s why we recommend these systems for flat roofing projects.

Installation Options

Overlay/Retrofit

Duro-Last and Goliath flat roofing systems are versatile and allow for various installation methods to match different roofing needs. For instance, if a property owner is proactive in replacing their roof and the existing substrates have not become saturated with water due to excessive roof leaks, our roofing professionals can cap-over the existing roofing substrates in an overlay/retrofit installation.

Overlying or retrofitting allows our roofers to install the Duro-Last or other Canada-made roofing membranes like the Goliath system directly over an existing roof substrate. This roofing approach saves significant money on the necessary materials and labor. It also minimizes disruption to your facility’s daily operations and generally leads to a faster installation.

Full Replacement

Suppose the existing roof substrate is saturated with water or shows signs of extensive damage. In this case, our roofing professionals may recommend replacement. Such a roofing project requires us to remove all existing roofing materials and insulation before installing a Duro-Last single-ply system or Goliath roof assembly.

Extended Roof Life

Retrofitting or overlaying an existing roof with a Duro-Last or Goliath roof system extends the lifespan of the existing roofing susbstrates and delays the need for another full replacement. Duro-Last and Goliath flat roofing membranes are known for their durability. Thus, they provide consistent protection against harsh weather for decades.

This long-term performance reduces ongoing maintenance costs and the need for frequent flat roof replacement. Therefore, using top-quality, time tested, flat roofing materials offers real financial value to industrial and commercial building owners.

Energy Efficient & UV Resistant Roofs

Goliath and Duro-Last flat roofs are engineered for energy efficiency. These roofing systems have UV-resistant, reflective surfaces that reduce heat absorption and keep buildings cooler in summer. This lowers overreliance on HVAC systems, resulting in reduced energy use and lower utility bills.

In addition, commercial flat roofs require minimal maintenance because the membrane is resistant to mold, mildew, and algae growth. Their smooth surfaces also prevent debris buildup and drainage system issues. When maintained properly, these roofs are energy efficient and durable.

No Wastage of Roofing Materials

Capping over an existing roof with a Duro-Last or Goliath retrofit or overlay roof assembly helps conserve resources by extending the service life of your current roofing system. Instead of completely tearing off your existing roof, the overlay method allows us to install the new roofing membrane on top of the existing substrates (if they’re in good condition), preserving their value.

This flat roof installation method enhances performance and durability without requiring large quantities of new roofing materials. Therefore, it lowers the overall environmental footprint of a roofing project. Remember, we only recommend complete roof tear-off and replacement if, after a thorough inspection, we determine that your flat roof is extensively deteriorated.

Recyclable Flat Roof System

The “Recycle Your Roof” initiative from Duro-Last gives property owners an environmentally responsible option for roof disposal. Instead of sending old roof membranes to landfills, this program collects and recycles them for reuse in new products.

The program keeps old roofing materials away from the waste stream. Thus, it supports a circular approach to flat roofing, a process that gives used roofing membranes a second life. This reduces landfill burden and demonstrates a clear commitment to sustainability.

Top-Quality Flat Roofing Systems

The Duro-Last roofing system and Canada-made Goliath roofing assemblies we recommend are engineered to withstand even the harshest weather conditions. For instance, the Duro-Last and Goliath systems have heat-welded seams and a watertight design that offers superior protection against leaks.

Unlike most flat roof systems with vulnerable joints and seams, Duro-Last an Goliath flat roof assemblies offer a watertight barrier against water leaks and moisture infiltration. Thus, your commercial property or industrial facility will be protected from water damage. Remember, the PVC membrane is resistant to tears, punctures, and other forms of roof damage.

Ready for a new roof?

At Watertite Roofing, we’re committed to offering superior flat roof replacements and other roofing solutions that combine innovative technology with quality craftsmanship. We leverage our 50 years of combined experience and wealth of flat roofing knowledge to ensure that owners of industrial facilities, commercial properties, and residential homes can get the best value for their investments in flat roof replacement.

Our Flat Roof Inspection Can Save You Thousands

A proper flat roof inspection is the first step to keeping your property protected year-round. In Ontario, flat roofs face heavy rain, snow buildup, and rapid freeze-thaw cycles that test every roofing seam. A professional inspection helps identify issues like clogged drains, trapped moisture, and weak membrane areas before they cause costly leaks or structural damage.

Our roofers check every section for water pooling, cracks, and improper slope that can slow drainage. They also inspect vents, flashing, and joints to ensure water moves freely toward drains or scuppers. Modern drainage systems are designed to prevent standing water and extend roof life.

Whether your building uses internal drains or external downspouts, keeping them clear is essential for long-term performance. Regular inspections every spring and fall can save thousands in repairs and keep your roof performing at its best.

Flat Roof Installation in the Ontario Winter

Modern flat roofing systems and cold-weather compatible materials allow our roofing contractors to complete installations safely and effectively, even in freezing temperatures. The key is preparation, precision, and using products built to handle the season.

A cold-weather flat roof installation follows a careful process:

• Site Preparation: Clear snow, ice, and debris to create a clean surface.
• Moisture Control: Ensure the substrate is dry before applying any roofing layers.
• Material Selection: Use flexible membranes designed for cold application.
• Temperature Monitoring: Work during daylight hours when conditions are most stable.
• Seam Sealing: Thermally weld roofing seams with computerized hot-air welding units.
• Inspection and Cleanup: Double-check seals, flashing, and drainage paths before leaving the site.

When managed by the experienced roofers at Watertite Roofing, winter installations offer the same strength and weather protection as those done in warmer months. For Ontario businesses that can’t afford downtime, this is a reliable and efficient solution to keep projects on schedule and roofs in good condition year-round.

What’s the Flat Roof Replacement Cost in Ontario?

Whenever you think there’s an issue with your roof, let our roofing experts carry out a thorough flat roof inspection. In many cases, targeted flat roof repairs can fix small leaks or other forms of isolated damage and restore your roof’s performance.

When to Repair Your Flat Roof

Here’s when we recommend flat roof repairs:

• Minor cracks, minor flashing issues, and other forms of isolated damage
• Your roof isn’t old and hasn’t developed membrane buckling or widespread leaks
• The roof’s membrane, insulation, and the underlying substrate are still in good condition
• No structural roof damage, and most roof issues are limited to the membrane’s surface

When to Replace Your Flat Roof

There are times flat roof repairs won’t cut it. Any minor leaks and small cracks we identify during regular inspections can be fixed through targeted repairs. However, when your flat roof has deep structural issues or the system has surpassed its service life, we may recommend a full flat roof replacement. Here’s when complete replacement makes sense.

• Large blistered sections, widespread leaks, and extensive damage to your roof
• Extensive water damage to the insulation, damaged decking, and other structural issues
• Old roof (over 20 years) that requires costly maintenance
• Multiple, recurring leaks that indicate structural roof problems

The specific materials you need for your roofing project will significantly affect the total cost of your flat roof replacement. Work with our team to determine the specific materials you need, their cost, and how to source them.

Ready to Replace Your Flat Roof?

Whether you need a flat roof replacement for your commercial, residential, or industrial building, you can count on us to use high-quality materials to ensure your new roof is durable. Contact us for an initial roof inspection and an accurate estimate for costs and project timeline.

Schedule a free consultation today and let our professional roofers assess your roof.

FAQs