There are two completely different warranties on every roof, and most homeowners only ever hear about one of them.
This covers defects in the shingles or roofing material itself — not installation errors, and not storm damage. Most manufacturer warranties on quality shingles run 25-30 years, but here's the part that matters: many are prorated, meaning the manufacturer only covers the full replacement value for a limited initial period, with coverage declining after that. Read the actual prorated schedule, not just the headline number of years.
This is the one that actually varies the most between contractors, and it's the one worth asking hard questions about. A workmanship warranty covers problems caused by installation error — not material defects, and not storm damage — and terms range enormously, from as little as one or two years to a lifetime warranty, depending entirely on the contractor. This warranty is only as good as the company standing behind it still being in business when you need it.
That last question is worth asking directly rather than assuming — the answer genuinely varies by contractor and by manufacturer.
Both matter, but for different failure modes. Material defects are relatively rare with quality shingles; installation errors are the more common real-world problem, which makes the workmanship warranty — and the contractor standing behind it — arguably the more practically important one.
No — storm damage is an insurance matter, not a warranty matter. See our insurance claim guide for how that process actually works.
A workmanship warranty is only as good as the company behind it — if the contractor closes, that warranty typically becomes unenforceable, which is exactly why longevity and reputation matter as much as the warranty terms on paper.