Most GTA homeowners assume their roof is fully protected after a new installation. The reality is more complicated — and knowing the difference could save you thousands.
You just spent $10,000–$18,000 on a new roof. The contractor hands you a warranty document and tells you you're covered for 25 years. You feel good about it. But when a problem shows up three years later, you call to make a claim — and suddenly nothing seems to be covered.
This is one of the most common frustrations GTA homeowners face. The problem isn't that warranties are fraudulent — it's that most homeowners don't understand what they actually bought. This guide breaks it down in plain language so you know exactly where you stand.
Every new roof comes with (at most) two separate warranties. They cover completely different things, and it's critical to understand which is which.
This covers the shingles themselves — the physical material. If a shingle cracks, granules fall off prematurely, or the product fails under normal conditions, the manufacturer is responsible for replacing the material (not the labour). Most major shingle brands — IKO, CertainTeed, GAF, BP Canada — offer warranties ranging from 25 to 50 years, with some offering a "lifetime" warranty.
The catch: manufacturer warranties are prorated. That means after a certain number of years, you only receive a percentage of the original value. A 30-year shingle with a claim in year 20 might get you 30 cents on the dollar — and only for the material, not for tearing off the old roof and reinstalling.
This covers how the roof was installed. If a leak develops because flashing was improperly installed, a valley wasn't done right, or nails weren't driven correctly — that's a workmanship issue. This warranty comes from your contractor, not the manufacturer.
Workmanship warranties vary significantly: some contractors offer one year, some offer five, some offer ten. At Ultimate Home Services, we offer a 15-year workmanship warranty — one of the strongest in the GTA. This is one of the most important questions to ask before hiring anyone. A contractor who stands behind their work offers a strong, written workmanship warranty. One who offers none — or buries limits in the fine print — is telling you something.
Under Ontario consumer protection rules, verbal warranties are difficult to enforce. Always get your manufacturer warranty registration confirmation and your contractor's workmanship warranty as a signed, written document before final payment. Keep both on file — you'll need them if you ever sell your home or make a claim.
Even within the manufacturer warranty, coverage is narrower than most homeowners expect. Here's what's typically included — and what's not.
This is the single most common reason manufacturer warranties get voided — and GTA homeowners are especially vulnerable.
Shingle manufacturers require proper attic ventilation as a condition of their warranty. If your attic doesn't have adequate airflow — whether from a poorly designed system, blocked soffit vents, or an insufficient number of roof vents — heat and moisture build up. That accelerates shingle aging, causes premature failure, and creates conditions for ice dams and mold.
When you try to make a warranty claim, the manufacturer will inspect and, if they find your ventilation is below their required standard, they'll deny the claim entirely. We've seen homeowners left with nothing after spending tens of thousands on a roof, purely because the ventilation wasn't up to spec — often because the original installer didn't address it.
Always confirm that your contractor is addressing ventilation as part of the installation. It's not optional — it's a warranty requirement.
Ontario's winters create a specific risk for roofs: ice dams. When heat escapes through the roof deck and melts snow at the surface, water backs up behind the ice and can get under shingles. This causes leaks, rot, and significant interior damage.
The Ontario Building Code requires ice and water shield on the first three feet from the eave on any new or replacement roof. This self-adhering membrane is your primary defence against ice dam damage. If it wasn't installed — or wasn't installed correctly — neither your manufacturer warranty nor your homeowner's insurance will cover the resulting damage as a roofing defect.
Ask your contractor to confirm: How many feet of ice and water shield are being applied? On a home in Aurora, Vaughan, or anywhere north of the 401, we typically recommend extending to six feet for added protection given the climate.
Most major shingle manufacturers offer "enhanced" or "contractor-tier" warranties for homeowners who use certified installers. For example, IKO's Dynasty and CertainTeed's SureStart programs extend coverage, add labour costs, and sometimes include non-prorated periods.
These enhanced warranties are only available through certified, manufacturer-approved contractors. If your contractor isn't certified, you can't access them — even if you're using that brand of shingle. It's worth asking your contractor: "Are you certified with this manufacturer, and does that unlock a better warranty for me?"
Many homeowners confuse their insurance policy with their roof warranty. They're not the same thing. Your homeowner's insurance typically covers sudden and accidental damage — a tree falls on your roof, a windstorm lifts shingles. It does not cover gradual wear, pre-existing defects, or damage caused by poor installation or lack of maintenance.
Your roof warranty covers product failure and workmanship defects. If your shingles start curling at year 8 on a 25-year product, that's a warranty issue, not an insurance claim. Knowing which to call first will save you time and frustration.
In Ontario, real estate transactions increasingly require sellers to disclose warranty documents and remaining coverage on major systems including the roof. A transferable manufacturer warranty adds real value. Make sure you have your warranty registration number, installation date, and contractor information in your home documents file before listing.
We include a 15-year written workmanship warranty on every roof, backed by manufacturer product warranties. We make sure your ventilation and ice and water shield are done right — so your warranty actually holds up when you need it. Serving Aurora, Thornhill, Richmond Hill, Vaughan, Markham, and the GTA.
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