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Commercial Flat Roof Replacement

Reasons for roof replacement include roof failure, leakage, aged and worn out materials or a recently purchased property that requires updates. Installing an A/C unit on the roof, a plumbing stack, an exhaust vent, a skylight, or other such additions may also necessitate roof replacement. Should your roof require renewal, depending on its state and your aims, it may be advisable to replace the entire rooftop, or to explore options for partial replacement.

There exists three systems for commercial flat roof replacement. The first can be combined and patched with the second, while the third can only be combined with itself. Your objectives and your budget will determine the best option to meet your needs.

Commercial Flat Roof Replacement

Tar and Gravel System

This is an older, tried and true system which is less common today, but most effective in protecting a flat roof from improper drainage, or ponding. A tar and gravel roof doesn’t have a manufacturer, but is made with four layers of boiled tar and felt, with a “flood coat” of tar on the top and gravel spread evenly over that. A tar and gravel roof can be submerged under water for long periods of time and still last, as there are no seams or cracks where water may seep through.

If you choose to do patchwork on a tar and gravel system, there is a good chance we will opt for a 2-ply system. The 2-ply rolls will effectively adhere to the roof’s protection board as the surrounding tar is torched to help melt the patch into place.

Modified Bitumen 2-Ply System

This system consists of three-foot rolls with a three-inch overlap at the seams and a cap sheet that may be exposed to the sun. This system is more cost-effective than the first, but leaves the building vulnerable to eventual potential leakage issues, as it cannot remain submerged underwater over a long duration due to the creases. If your flat roof has a gentle slope which aids with drainage, and you are diligent about roof maintenance, this may be the option for you. This system may only be repaired with the same system.

1-Ply System

This system consists of only the cap. While it’s the most cost-effective option, it has overlap seams, meaning it does not fare well over long periods of submersion under water.

Contact us for pricing, which varies based on your area as well as your roof’s requirements for reparations and the system you decide to choose.

7 Benefits of Hiring Integrity Roofers for Commercial Roof Replacement

Enhanced Work Safety

We know that accidents happen, and in the roofing business, it isn’t if; it’s when. Attention to detail involving potential risks and hazards is part of the approach when roofers prosecute roofing problems. A roofing contractor will train their staff to be vigilant and identify issues before they can cause injury. If an injury or accident occurs on-site, a roofing contractor holds insurance to prevent property owners’ liabilities from causing financial distress.

Quality Materials

A roofing contractor has access to the best materials money can buy, and the materials will last for many years. That is important because a roofer’s name is his brand, and the materials keep the building protected so the contractor won’t buy cheap building materials. Because roofers buy in bulk, they can ensure lower prices for better products, lowering costs for the building owner.


Suppose you don’t have access to high-quality roofing materials, professional-grade tools and the experience to provide an effective solution to your roofing problems. In that case, you are not a professional roofer. Leave the work to those who have the expertise and equipment to initiate a quality roof replacement that reduces time and the costs associated with the work.

Quality Installation

When hiring a contractor for your roofing system, look for one with years of experience in the roofing business. Experience is the best teacher, and professional roofing contractors have seen it all. They are uniquely placed to fulfill the promise of the work necessary to correct any roofing problems your building has. After-the-fact problems like leaks are eliminated when choosing to go with a seasoned contractor who knows their business.

Fast And Smooth Service Execution

Remember that when you hire a roofing contractor, you need to do your due diligence to find the best available contractor who has a background in your roofing problems. A contractor who excels at their business will execute a roofing solution within a prescribed amount of time and within budgetary constraints. Hiring a lesser contractor with limited experience can lead to problems because they encounter situations where they have had no exposure.


At Integrity Roofers, we provide two warranties for any work we do on-site. The first warranty covers our work at your facility and the second warranty is a materials warranty for products we install. We follow the manufacturer’s guidelines for installation to maintain a valid warranty. Without following the guidelines, your product warranty can be voided without notice. If our work is defective, we will follow up and make things right with any building owner because we stand behind everything we do as Toronto’s top commercial roofing company.

Certifications And Awards

At Integrity Roofers, we hold the prestigious designation of Quality Masters and Shingle Applicators from CertainTeed – one of the largest roofing supply companies in North America. We have worked in the roofing business for over two decades, and we have the knowledge and expertise to enact the right solution at the right time for your building. We carry $2M worth of liability insurance to protect your investment and our team in the event of a problem.

Trust Us for Commercial Roofing Services

Every building is different, and roofing solutions vary based on the needs of the building. When you need a professional roofing contractor, call us for an estimate that will be tailor-made to suit your facility. Costs associated with roofing work vary based on the needs of the building and roofing system you choose, so you need the good counsel of a professional roofing company like ours at integrity Roofing. We use digital evidence to demonstrate the weaknesses of your current roofing system, and we will make recommendations to correct the problems. To request a quote for your roofing needs, click on the estimate page and provide your contact details for all the information you need to make an informed decision. If you need immediate help with any roofing problems you are experiencing, please call our office today at Integrity Roofers at 647-504-2121.


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