New Roof Installation & Roof Replacement in St. George, Ontario
Every roof reaches a point where repairs stop being the most practical long-term answer. Years of weather exposure, worn shingles, recurring leaks, aging flashing, and ventilation problems can all add up until the roof is no longer protecting the structure the way it should. When that happens, a roof replacement is not just about new materials on the surface. It is about restoring the full roofing system so the home is protected properly moving forward.
At Aucoin Roofing, we provide roof replacement services in St. George for homeowners and property owners who need more than a basic tear-off and re-shingle approach. We inspect the full system before recommending replacement, looking at visible wear, roof details, ventilation performance, and signs of hidden moisture issues below the outer material. As a CertainTeed ShingleMaster™ certified contractor, we install roofing systems to manufacturer-approved standards designed to support long-term durability, energy efficiency, and reliable warranty protection.
A Full-System Approach to Roof Replacement
A new roof performs best when every part of the assembly works together. Shingles alone do not determine how well a roof will hold up over time. Underlayments, flashing, decking condition, ventilation balance, water shedding, and installation quality all contribute to whether the finished system performs the way it should.
That is why Aucoin Roofing does not treat roof replacement as a surface-level upgrade. Before any new system is installed, we assess the condition of the existing roof and identify the details that need to be addressed as part of the replacement. In some homes, that may involve aging flashing or roof transitions. In others, it may include ventilation corrections or damaged decking that would otherwise shorten the life of the new roof. Our work is completed by trained in-house crews, and every replacement reflects the same accountability and workmanship that have helped build trust across Southern Ontario. Aucoin Roofing is fully licensed, insured, and WSIB compliant, and every roof replacement is backed by our written 15-year workmanship guarantee.
Roof Replacement Options for Different Property Needs
No two replacement projects are exactly the same. Roof design, building type, and long-term ownership goals all influence which roofing system makes the most sense. At Aucoin Roofing, we provide replacement solutions designed to fit the structure properly and perform well over the long term.
Asphalt Shingle Roof Replacement:
For many homes in Norfolk County, asphalt shingles remain the most practical and popular roofing choice. We install high-quality shingle systems that offer strong weather protection, curb appeal, and reliable long-term performance when installed as part of a complete roofing system.
New Roof Installation for Homes:
Whether you are replacing an aging roof or upgrading after years of wear, we install new roof systems designed to protect the full structure. That includes proper underlayments, flashing details, ventilation components, and manufacturer-approved installation methods that support long-term durability.
Metal Roof Replacement:
For homeowners or property owners looking for a long-lasting upgrade, metal roofing offers a durable option with strong performance and a distinct appearance. Aucoin Roofing provides metal roofing solutions where the property and roofing design are a good fit for that system.
Low-Slope and Flat Roof Replacement:
For residential and light commercial low-slope applications, Aucoin Roofing focuses on two-ply modified bitumen systems. These are a dependable choice for flat and low-slope roof areas where water control, seam integrity, and long-term durability matter most.

Roofing Solutions That Fit St. George Conditions
Roofs in St. George deal with more than simple age. Over time, snow, wind, rain, humidity, and freeze-thaw movement all place stress on shingles, flashing, drainage details, and attic ventilation. That is why a proper roof replacement in St. George should be based not only on what the roof looks like today, but also on how it has handled years of local exposure.
Some homes in St. George may have older roof details, worn decking, outdated airflow, or transitions that should be corrected as part of the replacement process. Others may include additions, low-slope areas, or roof penetrations that require more careful planning. At Aucoin Roofing, each replacement project is tailored to the home, the roof layout, and the conditions the property faces so the finished system is built for dependable long-term protection.
The Aucoin Signature 5-Step Process
Every roof replacement follows a structured system to ensure long-term performance, not short-term patchwork.
1. Consultation:Every project starts with a detailed on-site inspection. We assess the full roofing system, explain what we are seeing, and provide a clear quote that helps you understand exactly what is being recommended and why.
2. Preparation & Property Protection: Before the replacement begins, we take steps to protect the surrounding property. That includes areas like landscaping, decks, windows, and other vulnerable surfaces so the work can move forward safely and cleanly.
3. Certified Installation & Complete Roofing System Approach: As a CertainTeed ShingleMaster® approved contractor, Aucoin Roofing installs roofing systems to manufacturer-approved standards. We approach every new roof as a full protective system, not just an outer layer of material.
4. Controlled Debris Removal & Thorough Jobsite Cleanup: We use the right equipment to manage tear-off debris and keep the site under control throughout the project. Ongoing cleanup and magnetic sweeps help keep the property safe and tidy during and after installation.
5. Final Review, Warranty & Long-Term Protection: Once the installation is complete, we do a final walkthrough to make sure every part of the project meets our standards. Your roof replacement is then backed by a written 15-year workmanship guarantee for added confidence moving forward.

Certified Expertise & Guaranteed Workmanship
Aucoin Roofing is a CertainTeed ShingleMaster approved contractor and fully licensed, insured, and WSIB compliant. Every project is completed to strict manufacturer and industry standards and backed by a written 15-year workmanship guarantee, giving homeowners and property managers long-term confidence that their investment is protected by both certified installation practices and our commitment to quality.
Serving St. George Homeowners & Property Owners
If you are considering a roof replacement in St. George, Aucoin Roofing brings the experience and system-based approach needed to do the job properly. We understand that replacing a roof is a major investment, and most property owners want straightforward advice, quality workmanship, and confidence that the new system will hold up well for years to come.
If your current roof is showing its age, developing leaks, or no longer performing the way it should, our team can help you understand the condition of the system and the best next step. Aucoin Roofing provides roof replacement services in St. George designed to protect your property and deliver long-term value.
Frequently Asked Questions
A proper new roof installation includes more than just new shingles. It may include tear-off of old materials, inspection of the roof deck, underlayments, flashing updates, ventilation components, and the final roofing material itself. At Aucoin Roofing, we approach replacement as a full roofing system so the finished roof is built to perform, not just to look new.
Most residential roof replacements can be completed within a short timeframe, often in as little as one to a few days depending on the size of the roof, weather conditions, and project complexity. Larger homes, steep rooflines, and properties with additional repair needs may take longer. During your quote, Aucoin Roofing can give you a better idea of the timeline based on your specific roof.
If the damage is limited to one small area, a repair may still make sense. But if the roof is aging, leaking in multiple areas, losing shingles, or showing widespread wear, a full roof replacement is often the smarter long-term investment. At Aucoin Roofing, we inspect the full system and give honest recommendations based on the roof’s overall condition, not just the most visible issue.
The cost of a new roof in Hamilton depends on the size of the roof, the material being installed, the pitch and complexity of the structure, and whether any decking or flashing repairs are needed during the replacement. A straightforward shingle roof replacement will cost less than a more complex project involving multiple rooflines, steep slopes, or low-slope sections. The best way to get an accurate number is with an on-site inspection and written quote based on the actual condition of the roof.
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Magnet Clean clean-up
We perform a multi-point inspection and use industrial magnets to ensure your driveway and lawn are free of nails and debris. Aucoin Roofing doesn’t leave a mess!

Aucoin Roofing is a certified Velux® Intsaller

Aucoin Roofing is a certainteed® ShingleMaster™ Roofing Contractor




