When it comes to your home, your roof is your first line of defense. At Guaranteed Roofing and General Contracting, we’ve spent over 30 years protecting Ontario homes with durable, high-quality roofing systems built to last.
As a fully insured, award-winning, family-owned company, we don’t just install roofs – we deliver peace of mind. We take pride in clear, personal communication and hands-on service from start to finish. With decades of experience behind us, we bring the skill and knowledge to handle every aspect of residential roofing with confidence and care.
We’re not your average roofing company. Every inspection and estimate is completed personally by Rob, our founder and owner, ensuring exceptional quality, accountability, and attention to detail on every project.
Quality and integrity are our focus – and experience is what makes the difference.
Full roof replacement using premium materials designed for long-term durability and performance in Ontario’s demanding climate. We approach every replacement with precision, care, and honest recommendations. Protecting your home with a roof built to last.
Professional new roof installation for homes, additions, and custom builds. Every project is completed with expert workmanship, attention to detail, and materials selected for long-term performance – ensuring your new roof is done right from day one.
Fast, reliable roof repairs focused on solving the problem at its source – not just covering it up. From leaks and missing shingles to flashing failures and storm damage, we provide honest assessments and long-lasting repairs you can trust to protect your home.
Roof repair services that we provide include:
Preventative roof care designed to extend the life of your roofing system and protect your home year-round. Our maintenance services include roof rejuvenation treatments, seasonal inspections, gutter and eavestrough cleaning, debris removal, and snow removal — helping you avoid costly repairs before they start.
We have been proudly serving our community since 1994, bringing proven expertise to every project. Owner, Rob, has more than 35 years of hands-on roofing experience and personally oversees inspections, estimates, and training to ensure uncompromising standards.
As a family-owned and operated company, we are committed to delivering quality customer experience defined by craftsmanship, transparency, and premium materials. Every project is guided by integrity, attention to detail, and a commitment to exceeding expectations - not just meeting them.
We specialize in complete roofing systems - from ventilation and underlayment to shingles and finishing details. Every layer is installed with precision for lasting durability and protection. As IKO RoofPro Select Contractors and Certified Velux Installers, we uphold the highest standards through ongoing training and industry best practices.
We maintain full WSIB coverage and comprehensive liability insurance, with safety as a non-negotiable standard on every job. Our team is professionally trained in fall protection, safety compliance, and best-practice installation methods to ensure every project is executed with precision and care.
Roofs in Ontario face snow, ice, rain, hail, and high winds. Our roof systems are designed for durability, water resistance, and year-round protection.
Not every roofing problem requires a complete replacement. Our team begins with a thorough assessment of your roof and overall roofing system to determine its condition. We look at the shingles, flashing, ventilation, underlayment, and other components to identify the cause of the problem and recommend the most appropriate solution – whether that’s a roof repair, rejuvenation, or full roof replacement.
The lifespan of a roof depends on the roofing materials, quality of installation, ventilation, maintenance, and other factors. Depending on materials chosen, modern asphalt roofing systems can last between 30-50 years. At Guaranteed Roofing, we pride ourselves on installing a total roofing system that will protect your home and maximize the life of your roof. We also offer Roof Rejuvenation services which focus on extending the life of your existing roof without the cost of full replacement.
Every home and roofing project is different, so there is no one-size-fits-all price. The cost of a residential roof depends on factors such as the size and slop of the roof, roofing materials, ventilation, etc. Rob, the owner of Guaranteed Roofing, completes all inspections and estimates personally. We pride ourselves on leading with honesty and integrity – providing detailed assessments and transparent estimates so you understand what is included in your roofing investment.
In many cases, yes. If the existing roofing system is still a good candidate for repair or roof rejuvenation, we may be able to extend its life rather than recommending replacement. Our goal is to provide an honest recommendation based on the condition of your roof.
Yes. We provide emergency roof repair for storm damage, active leaks, and urgent roofing issues to help protect your home and prevent further damage.
A proper roof replacement or installation involves much more than just shingles. Components of a roofing system work together to protect your home from the top down. We are experts in all aspects of roofing systems from roof decking, underlayment, flashing, ventilation, insulation, eavestrough, shingles, and more. We take a whole-system approach to residential roofing to ensure your home is protected for decades to come.
Proper attic ventilation helps manage heat and moisture within your roofing system. Inadequate ventilation can contribute to premature shingle deterioration, moisture problems, rotting plywood, ice damming, and other issues. As part of our roofing assessment, Rob inspects your roofing systems ventilation to help ensure your roof is designed and installed to perform properly.
Yes. In addition to residential roof replacement and installations, Guaranteed Roofing provides roofing repairs and maintenance services to help homeowners address issues and protect the longevity of their roofing systems. Regular attention to your roof can help identify potential problems before they develop into more costly repairs. Contact us to learn more about our annual inspections and maintenance programs.
Yes. Rob, the owner of Guaranteed Roofing, personally completes all roof inspections. A leader in the industry, Rob has over 40 years of experience in the field and is known as the “Leak Whisperer”, renowned for finding and fixing leaks no other contractors can. Whether you are experiencing a leak, considering a roof replacement, looking into roof rejuvenation, buying or selling a home, or simply want to understand the condition of your roof – an inspection from Guaranteed Roofing can provide valuable information about your roofing system.
Guaranteed Roofing is a family-owned and operated roofing company with more than 30 years of experience. We believe a roof should be treated as an entire system – not simply a layer of shingles. Our team takes the time to assess your roof, identify underlying concerns, communicate our recommendations clearly, and complete the work with quality and integrity. Our goal is to provide homeowners with a roofing system they can rely on for years to come.
Serving York Region, Simcoe County, Muskoka, Almaguin, and Beyond!
York Region:
King Township, Kettleby, Schomberg, Nobleton, Pottageville, King City, Newmarket, Aurora, East Gwillimbury, Holland Landing, Georgina, Sharon, Mount Albert, Richmond Hill, Stouffville, Uxbridge, and surrounding communities.
Simcoe County:
Bradford, West Gwillimbury, Tottenham, Alliston, Innisfil, Barrie, Oro-Medonte, Orillia, Collingwood, and surrounding communities.
Muskoka/Almaguin:
Gravenhurst, Bracebridge, Huntsville, Muskoka Lakes, Port Sydney, Utterson, Emsdale, Burk’s Falls, Magnetawan, Sprucedale, Kearney, and surrounding communities.
Wherever you are in our service area, every homeowner receives the same premium materials, expert installation, and attention to detail – from the first inspection to the final nail. That is the standard Guaranteed Roofing is known for.