What To Look For When Hiring a Roofing Contractor in Toronto

There is one piece of information the Ontario government publishes about roofing contractors that most homeowners never see. It is on ontario.ca, and it reads: “Roofing contractors are not licensed by the government.”

That single sentence changes how you should approach hiring. If roofing is not a licensed trade in Ontario, a contractor cannot show you a government-issued licence. So what do you actually look at? How do you separate a contractor worth hiring from one who will damage your roof and disappear?

At Seam Roofing, we have been installing and repairing roofs across Toronto and the GTA for long enough to have seen both sides of this. We get calls from homeowners whose previous contractor did not pull permits, used the wrong membrane for their flat roof, or left flashing unsealed. This guide reflects the standards we hold ourselves to on every job we do across Toronto, Mississauga, Oakville, Vaughan, Markham, Brampton, Pickering, Burlington, Richmond Hill, and Hamilton.

Start With WSIB and Liability Insurance

Because roofing is not a licensed trade, these two documents do the job that a licence would do in other industries. They are the actual protection mechanisms, and they are the first thing you ask any contractor for, including us.

WSIB clearance certificate

WSIB stands for the Workplace Safety and Insurance Board. In Ontario, contractors who employ workers on roofing jobs are required to maintain WSIB coverage. A clearance certificate confirms that the contractor is registered and in good standing. If a worker is injured on your roof and the contractor does not have WSIB coverage, you can be held liable as the property owner.

Ask for the clearance certificate before signing anything. You can also verify it independently on the WSIB website. Seam Roofing maintains active WSIB registration and provides a current clearance certificate to every client without being asked twice.

Liability insurance

This covers damage to your property during the job. A minimum of $2 million in general liability coverage is standard in this market, but for commercial and larger residential projects in the GTA, the right coverage is meaningfully higher. Seam Roofing carries $10 million in commercial liability insurance. Ask for the certificate of insurance, not just verbal confirmation.

If a contractor makes you feel like you are being difficult for requesting documentation, that is information about how the rest of the job will go. You can review our credentials on our licenses and certifications page, including our Working at Heights and Zoom Boom certifications.

Local References You Can Actually Call

Generic online reviews are useful context, but they do not tell you what you need to know before a $20,000 to $60,000 roofing project. What tells you more is a list of recent local jobs with contact information for the homeowners. Ask for two or three references from the past twelve months, ideally in your neighbourhood, on a property type and roof system comparable to yours. If you are having a standing seam metal roof installed, ask for references from other standing seam jobs, not shingle work. The skill sets are genuinely different.

When you call, ask specific questions. Not just “were you happy?” but: Did they show up when they said they would? Were there unexpected costs at the end? How did they handle problems when they came up? Is the roof performing the way they described?

Most contractors can produce references. The contractors who cannot, or who only offer recent ones when pushed, often have a reason. At Seam Roofing, you can also browse our completed roofing projects before reaching out, which gives you a sense of the work we do across different roof systems and property types in the GTA.

What a Real Written Quote Looks Like

A proper roofing quote is not a number on a page. It is a document that tells you exactly what work is included, what materials will be used, and what is excluded. Every quote Seam Roofing issues is written to this standard. At minimum, a written quote should specify:

Materials by name and grade

Not “shingles” but the specific product, manufacturer, and warranty. Not “flat roofing membrane” but TPO, EPDM, or torch-on modified bitumen, and the specific thickness and brand. If the quote says “premium materials,” that is a placeholder, not a quote. For shingle jobs specifically, our asphalt shingles page explains the difference between standard architectural shingles and impact-resistant products for Ontario’s climate.

Tear-off and disposal

Will they remove your existing roofing, how many layers, and how will debris be disposed of? This is often where low quotes cut corners.

Underlayment and flashing details

Ice and water shield along the eaves and in valleys is standard in Ontario’s climate. Proper flashing at chimneys, skylights, and wall transitions is where most post-installation leaks originate. If the quote does not mention these, ask why.

Ventilation

New roofing should be accompanied by a ventilation assessment. Installing new shingles over an under-ventilated attic is one of the fastest ways to cut the life of a roof in half. We have written about this in detail in our guide on why roofs fail early in Ontario.

Timeline and milestones

Start date, estimated completion, and what happens if material delays push things back. Most Seam Roofing residential projects are completed within days rather than weeks once we are on site, but the schedule still belongs in writing.

If a contractor gives you a number verbally and asks you to trust the details to them, get it in writing before anything else happens. Ontario’s Consumer Protection Act gives you some recourse on home improvement contracts, but your strongest protection is a clearly written scope of work before the job starts.

Deposit Terms: What Is Normal and What Is Not

Roofing contractors legitimately need some deposit to cover material costs before a job starts. That is standard in the industry. A reasonable deposit in this market is between 10 and 20 percent. Some contractors ask for a third upfront on larger jobs. What is not reasonable is a contractor asking for 50 percent or more before a single piece of material is on your roof.

Full payment before the job is done is a red flag in any trade. If a contractor pressures you to pay cash to get a discount, those are specific patterns that the Ontario Better Business Bureau and WSIB consumer resources flag regularly.

Structure the payment schedule in the contract. A common split is a deposit at signing, a payment at material delivery, and the balance on satisfactory completion. Seam Roofing builds these milestones into every contract, with the final payment held until you have walked the finished roof with us and signed off.

Employees vs. Subcontractors: Why It Matters

This question does not come up enough in conversations about hiring contractors, and it should. Many roofing companies have a sales and management team but subcontract the actual installation to crews they do not directly employ. That is not automatically a problem, but it creates accountability gaps. The crew doing your roof may have never worked for this company before. They may not be trained in the specific system being installed. Their workmanship is not the company’s consistent standard, it is whoever they got that week.

Seam Roofing runs every installation with our own employed crew. Our installers, including Vlad, Terry, and the rest of our team, are full-time employees who work on our roofing systems every working day. When something comes up during a job, we know exactly who is on the roof and what they have been trained on.

When you are talking to contractors, ask directly: who will be doing the installation, are they your employees or subcontractors, and how long have those crews worked with you? The answer tells you a lot about how much oversight you can expect.

Manufacturer Certifications and System-Specific Training

Roofing is not a licensed trade in Ontario, but training certifications from manufacturers are the next best thing. They matter more for some roofing systems than others.

Standing seam metal roofing

Standing seam systems require specialized training and specific equipment. A standing seam roof is mechanically seamed on-site using a portable seaming machine. A crew without the right equipment, or without training on the specific machine, will produce seams that fail. We see this on repair calls regularly: standing seam systems where the seams were hand-folded rather than machine-formed, and are now leaking at the joints. The training and tooling are the system, they are not optional. You can read more about what proper standing seam installation involves on our metal roofing page.

Flat roofing systems

Flat roofing systems also carry manufacturer certifications for TPO and EPDM membrane installation. A certified installer has been trained by the manufacturer on proper seam welding, drainage design, and installation conditions. This matters for the warranty: most manufacturer warranties require certified installation. If your contractor is not certified, your warranty may be void before the job is finished. Our flat roofing page covers the systems we install and what certified installation entails.

Ask what certifications the contractor holds for the specific system you are getting, not for roofing in general. Seam Roofing’s licenses and certifications are documented openly, including WSIB registration, Working at Heights certification, Zoom Boom certification, and the manufacturer-specific training that backs our warranties.

The Quote Without an Inspection

A contractor who quotes a roofing job without visiting the property and physically inspecting the roof is guessing. Some online platforms and app-based services offer satellite-based estimates, and some contractors will quote over the phone based on a rough description.

Those numbers are not real. They cannot account for deck condition, existing damage, ventilation deficiencies, flashing complications, or access challenges. They are optimistic starting points that frequently become much higher once work begins.

Seam Roofing does not quote jobs we have not seen. A proper roofing consultation looks at the roof itself, the deck condition, ventilation, flashing details, and access, and produces a written quote based on what is actually there. Our complete guide to roof inspections in Ontario covers what a thorough assessment looks at and why it produces a more reliable estimate than any satellite measurement can. If a contractor sends a quote significantly lower than others without seeing the roof, that gap is not savings. It is unexamined scope.

Red Flags Specific to the Toronto Market

Toronto has a few conditions that create specific contractor risk patterns worth knowing.

Storm chasers after major weather events

After significant hailstorms or wind events across the GTA, out-of-province contractors move in quickly. They door-knock, claim to have spotted damage from the street, and pressure homeowners to sign contracts before getting a second opinion. Legitimate contractors do not operate this way. If your roof has been genuinely damaged in a storm and you need work done quickly, our emergency repairs team handles urgent situations across the GTA without the pressure tactics.

The permit question

Many roofing jobs in Toronto require a building permit, particularly full replacements on houses in the former city boundaries. A contractor who says “we do not need a permit for this” without confirming it with the city is either cutting corners or does not know what they are doing. The permit should be in the contractor’s name and posted at the job site. Seam Roofing pulls our own permits as part of our project management process, so you are not coordinating with the building department on top of the project.

Heritage Conservation Districts

If your home is in areas like the Annex, Cabbagetown, Rosedale, or Wychwood Park, there are material and aesthetic restrictions on roofing that go beyond standard permit requirements. A Heritage Permit from the city is required before work begins. Our Toronto roofing page covers this in more detail for homeowners in these neighbourhoods.

Cash-only pricing

A meaningful discount offered for cash payment is almost always about avoiding paper trails. It means no HST paid and no documentation of what was agreed, which puts all the risk on you. Pay by cheque or e-transfer and keep records.

Questions to Ask Before You Hire

Here is a practical set of questions to bring to any roofing consultation. A contractor who is worth hiring will answer all of these without hesitation. We answer them as a matter of routine, and we recommend you ask every contractor on your shortlist:

• Can you provide your WSIB clearance certificate and certificate of insurance, and what is the coverage amount?
• Who will actually be on the roof, and are they your employees or subcontractors?
• What specific materials will you use, and can I see the product specifications?
• Does this job require a building permit, and will you pull it?
• What is your workmanship warranty, and what does it cover?
• Have you done this type of roofing system before? Can I speak to a recent client with a similar job?
• What happens if you find damaged decking once the old roofing is off?
• How do you handle site access and debris removal?
• When can you start, and what is a realistic completion date?
• What is your process if I have a concern or problem after the job is done?

You do not need all of these to be perfect. You need to see how a contractor responds when asked direct questions. Good contractors appreciate specific questions. It tells them you are a client who will value their work. Contractors who get evasive or defensive when asked for documentation are telling you something important.

How to Compare Multiple Quotes

Get at least three quotes from contractors who have actually seen the roof. Do not compare on price alone. The lowest quote is frequently not the cheapest job. It may be missing scope, using lower-grade materials, or planning to skip steps that other quotes include. Our roof replacement cost guide covers what realistic pricing looks like for different systems. Pricing also varies across the GTA: what a job costs in Oakville or Mississauga reflects local labour and logistics conditions.

When quotes come back significantly different, ask each contractor specifically what accounts for the difference. A $5,000 spread between two quotes on the same scope means something. The right contractor for your job is the one who explained their scope clearly, produced documentation without friction, showed you relevant local work, and gave you a number that holds when you compare it against what the scope actually requires.

Quick reference: What to verify before signing

What Seam Roofing Does Differently

Seam Roofing is a GTA-based roofing contractor specializing in three systems: metal roofing, flat roofing, and asphalt shingles. We work across Toronto, Mississauga, Oakville, Vaughan, Markham, Brampton, Pickering, Burlington, Richmond Hill, and Hamilton. Our crew are full-time employees who work on one type of roofing system or another every working day. We pull our own permits, carry WSIB coverage and $10 million in commercial liability insurance, hold Working at Heights and Zoom Boom certifications, and we do not quote a job we have not physically looked at.

If you are getting quotes and want to add ours to the comparison, book a roofing consultation and we will come out, look at the roof properly, and give you a written quote you can hold to. You can also browse our completed roofing projects or learn more about our team before reaching out.