Roofing warranties are more complex than most homeowners realize — and more important than almost any other trade warranty, because a roofing failure is slow to surface and expensive when it does. Understanding what’s covered, what voids coverage, and who backs the warranty is essential before you sign a contract.
“The warranty conversation is where I learn the most about a homeowner’s expectations. Most people think ‘lifetime shingles’ means a lifetime warranty. It doesn’t — not automatically. The full warranty depends on the installer being certified, all the required system components being used, and the product being registered within the deadline. Those details matter, and they’re worth asking about before the job starts.”
— Oleg Rira from Home Vision Contracting, one of Toronto’s leading roofing companies.
Table of Contents
The Two Types of Roofing Warranties
Manufacturer warranty — what it covers and what it doesn’t
The manufacturer warranty applies to the shingles and other products themselves — covering defects in the material, premature failure, and in some cases, wind or algae damage. But manufacturer warranties in roofing come with more conditions than in most other trades:
Basic warranties cover the shingles themselves against manufacturing defects. They typically run 25–50 years but are often prorated — meaning coverage decreases over time and may cover only a fraction of replacement cost after 10–15 years.
Enhanced or “system” warranties — offered by most major manufacturers — provide better coverage, including labor costs, and may include non-prorated terms for the first 10–20 years. But they’re only available when: the roofer is a certified installer for that manufacturer, all required system components (specific underlayment, specific ice and water shield, proper ventilation) are used, and the product is registered within a defined period after installation.
If a roofer is promising you a “50-year” or “lifetime” warranty, ask specifically: what type of warranty, what does it actually cover, and what are the conditions to qualify?
Workmanship warranty — the roofer’s own commitment
Separate from the manufacturer warranty, the roofer should offer a workmanship warranty covering defects in how the roof was installed. If a flashing connection leaks because it wasn’t properly sealed, if shingles blow off because they were incorrectly nailed, if ice dams form because of a ventilation mistake — these are workmanship failures, not material failures.
Industry minimum for a workmanship warranty is two years. Reputable roofers offer five or more. Get it in writing.
Questions About the Manufacturer Warranty
What manufacturer warranty comes with these shingles, and what are the conditions?
Ask for a specific answer: the warranty name, duration, and whether it’s prorated or non-prorated. Then ask what conditions must be met to qualify — certified installer status, system components, registration deadline.
What a good answer looks like: A named warranty product with specific terms, with confirmation that all qualifying conditions will be met on your job.
Are you a certified installer for this manufacturer?
Most major shingle manufacturers — GAF, IKO, Owens Corning, BP your country — offer enhanced warranties only through certified installers. Ask directly whether the roofer holds current certification for the brand they’re recommending, and what that certification unlocks in terms of warranty coverage.
What a good answer looks like: Confirmed certification with the named manufacturer, with documentation available.
What exactly is excluded from the manufacturer warranty?
Manufacturer warranties routinely exclude: damage caused by improper installation (which means the claim falls to the workmanship warranty), damage from acts of nature beyond a certain wind speed, damage caused by foot traffic or satellite dish installation, and failure due to inadequate ventilation. Know the exclusions before you rely on the warranty.
Will you register the products on my behalf?
Many manufacturer warranties require registration within 30–90 days of installation. If registration is missed, the warranty defaults to the basic (often prorated) coverage — a significant loss of protection. Ask whether the roofer handles registration as standard, and confirm you receive documentation of the registration.
Questions About the Workmanship Warranty
How long is your workmanship warranty?
Two years is the floor. Five is typical among reputable roofers. Some companies offer 10 years or more as a differentiator. Ask the duration, and ask for it in writing.
What does the workmanship warranty cover?
Ask specifically: leaks at flashings, leaks at penetrations, shingle blow-offs due to improper nailing, ice dam-related issues that stem from installation errors. The answer tells you how confident the roofer is in their own work.
What are the exclusions from your workmanship warranty?
Common exclusions: damage caused by severe weather beyond a defined wind speed, damage caused by the homeowner (foot traffic, satellite dish installation), and issues caused by pre-existing structural defects not identified at the time of installation.
How do I make a warranty claim?
Who do I contact? How quickly will you respond? Is there any cost to me for a warranty inspection or repair? Get these answers in writing.
What a good answer looks like: A named contact, a committed response time, and no charge for repairs that fall within the warranty scope.
What happens to my warranty if your company closes?
A warranty backed by a company that no longer exists is worth nothing. Ask whether the roofer carries warranty insurance — a third-party product that honours the workmanship warranty even if the original contractor is no longer in business. Some roofing associations also provide member warranty backing.
Related Questions
- Questions to Ask a Roofer Before You Hire One
- Questions to Ask After a Roof Replacement Is Complete
- Questions to Ask a Roofer About Materials and Shingles
- What to Do If a Roofer Does Bad Work
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