A roofing quote says:
“Lifetime warranty.”
Another says:
“15-year warranty.”
One sounds dramatically better.
But those numbers are almost meaningless until you answer:
Warranty on what?
Roofing can involve several different types of coverage.
The most common distinction is between:
- Manufacturer/material warranty
- Contractor workmanship warranty
- Additional product or treatment warranty
IKO explicitly advises homeowners to understand both manufacturer and workmanship warranties because they protect against different types of problems.
1. Manufacturer Warranty
This generally relates to the roofing product.
For asphalt shingles, manufacturer limited warranties typically deal with qualifying manufacturing defects under their stated terms.
IKO notes that standard manufacturer warranties generally cover material defects, while the extent and duration of coverage vary by manufacturer and product.
That distinction matters.
A manufacturer warranty does not automatically mean:
“Anything that ever goes wrong with the roof is covered.”
Weather damage, installation problems, alterations, maintenance requirements, transfer rules, and other exclusions can matter.
Always read the actual document.
2. Workmanship Warranty
This comes from the contractor.
It relates primarily to how the roofing system was installed.
Examples could include qualifying installation-related problems involving:
- Fastening
- Flashing
- Detail work
- Other workmanship
IKO recommends favouring contractors that provide a clear workmanship warranty in addition to manufacturer product coverage.
Ask:
- How long is it?
- What exactly is included?
- What isn’t?
- Who handles a claim?
- Does another contractor working on the roof affect it?
Get the answer in writing.
3. Roof-Rejuvenation Warranty
A roof-rejuvenation system introduces a different type of product and coverage.
NanoTech currently markets its GoNano roof-rejuvenation service with long-term warranty protection. GoNano states that available limited warranty duration can depend on factors including the roof’s age, condition, geographic location, and treatment system.
The key point:
Do not assume every rejuvenated roof receives identical coverage under identical terms.
Ask what applies to your specific roof and product.
Why “Lifetime” Can Be Misleading
Homeowners naturally hear “lifetime” and think:
“I will never pay for roofing again.”
That is not how most limited warranties work.
The warranty document defines:
- What “lifetime” means
- Who qualifies
- Whether coverage changes with time
- Transfer provisions
- Covered products
- Exclusions
- Claim procedures
GAF similarly notes that warranty terminology and eligibility depend on the qualifying products, property ownership, and specific warranty terms.
Read the conditions, not only the headline.
Product Failure vs. Installation Failure
Imagine shingles fail because of a verified manufacturing defect.
That may fall under manufacturer coverage.
Now imagine the material itself is fine, but flashing was incorrectly installed.
That is a different issue.
IKO specifically warns that manufacturer warranties and contractor workmanship coverage are not interchangeable.
This is why the better roofing question is not:
“How long is the warranty?”
It is:
“What event does this warranty protect me from?”
7 Warranty Questions to Ask Before Signing
Ask:
- Who issues the warranty?
- What specifically is covered?
- What is excluded?
- Does coverage become prorated?
- Is workmanship separate from material coverage?
- Is the warranty transferable?
- What documentation must I keep?
IKO also recommends ensuring warranty terms and promises appear in the written contractor agreement.
Keep Your Roofing Records
Save:
- Contract
- Product information
- Warranty certificate
- Installation date
- Contractor invoice
- Treatment records
- Photos
- Repair history
Years later, these documents can matter far more than remembering what the salesperson said at the kitchen table.
A Long Warranty Isn’t Automatically a Better Warranty.
Coverage matters more than the number printed in large type.
NanoTech’s role is to help homeowners understand both what the roof needs and what protection applies to the recommended solution.
Before choosing replacement or rejuvenation, ask NanoTech to explain the applicable warranty in plain language—and get the terms in writing.
