Quick answer: Adjusters and roofers routinely differ by thousands on the same roof. There's a standard fix, a supplement, and filed properly with an itemized contractor estimate it recovers an average of $7,000 to $8,000 per claim, roughly 20% to 30% above the insurer's first offer. Which tells you something uncomfortable about what the first offer was.
Your adjuster inspects the roof and offers you barely more than your deductible. Your roofer climbs the same roof and says it's thousands of dollars of damage.
Same roof. Same storm. Two numbers that aren't close.
Most articles about this will tell you it's an honest difference of professional opinion. That's partly true. It's also incomplete, and the incomplete part is the part that costs you money.
Why the first offer is low
Start with who works for whom. Your roofer works for you. The adjuster works for the company paying the claim.
I'm not saying adjusters are dishonest. Most aren't, and plenty are genuinely thorough. But look at the incentives honestly. A fast, low first offer costs the insurer nothing if you accept it. If you push back, they can revise it. The only scenario where the low number costs them anything is the one where you challenge it, and most people don't.
That's not a conspiracy. It's just what happens when one side has a claims department and the other has a weekend and a roof they can't see. The system runs on the reasonable assumption that most homeowners will take the first check.
The mechanics that produce the gap are mundane enough. Adjusters often inspect fast, sometimes from the driveway, sometimes off drone photos rather than walking the roof. Estimating software routinely omits or undervalues standard components like ice and water shield, drip edge and starter strip. A contractor pricing the actual repair includes real materials, real labor, permits, disposal and overhead at today's rates. For what a full replacement genuinely costs, see our roof replacement cost breakdown.
The number that gives it away
Here's the statistic that settles the argument for me.
Supplements, the additional claims filed when the original estimate missed work, recover an average of $7,000 to $8,000 per claim. Filed with a detailed contractor estimate behind them, they bring back 20% to 30% above the insurer's initial offer.
Sit with that. If first offers were accurate, supplements would recover close to nothing. Instead there's an entire industry function built around the fact that they routinely don't. The money was always there. It just isn't offered unless you ask.
What to do when the numbers don't match
Get the roofer's estimate itemized. Line by line. A lump sum can't be compared against anything, and comparison is your entire leverage.
Ask for a re-inspection with your roofer present. Most insurers agree to it. Your roofer pointing at damage in person beats paperwork arguing about it.
File a supplement for what was genuinely missed. Frame it as a documented list of omissions, not a request for more money. Most roofers use the same Xactimate software adjusters do, which makes the comparison hard to wave away.
Watch your window. Policies typically give you around a year from the date of loss to dispute. Don't sit on a low estimate.
Escalate if the gap is large. A public adjuster works for you. Appraisal is a formal process, optional to invoke and binding once either side does.
The honest caveat
None of this means every roofer is right and every adjuster is wrong. Storm-chasing contractors turn up after every hailstorm with inflated scopes and a clipboard, and some of them are worse actors than any insurer.
So the answer to who you should trust isn't the roofer. It's the itemized document. Whichever side can show you line items and point at them on your actual roof is the one worth believing. Our guide to hiring the right contractor covers how to tell a real one from a door-knocker.
Find a roofer who'll actually show up to the re-inspection
What you want isn't the cheapest bid. It's someone who documents damage properly, writes a real itemized estimate, and will stand behind it in front of an adjuster.
Qiggz is a free, US-based marketplace for finding local roofers and trades, with reviews from real customers and no lead fee baked into your quote. Find a roofer near you or create your free Qiggz account.
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Frequently asked questions
Why is my insurance estimate so much lower than my roofer's?
Partly mechanics, partly incentives. Adjusters often inspect quickly, sometimes from the ground or off drone photos, and estimating software commonly omits standard items like ice and water shield, drip edge and starter strip. Beyond that, a low first offer costs the insurer nothing unless you challenge it, and most homeowners don't.
What is a roofing insurance supplement?
An additional claim filed when the original insurance estimate missed work, either because damage was found once the job started or because a detailed comparison showed the original scope was incomplete. Supplements backed by a proper contractor estimate recover an average of $7,000 to $8,000 per claim.
How much can a supplement recover?
On average 20% to 30% above the insurer's initial offer when supported by a detailed itemized contractor estimate, based on 2025 industry data. The amount depends on how much the first estimate left out.
Are insurance companies deliberately underpaying roof claims?
Deliberate underpayment is a strong claim and not one worth making broadly. What's demonstrable is that the incentives don't reward generous first offers, and that supplements routinely recover thousands, which wouldn't happen if initial estimates were consistently complete.
Should I just trust my roofer instead?
Trust the itemized document rather than either party. Storm-chasing contractors with inflated scopes are a real problem too. Whoever can show you line items and point at the corresponding damage on your roof is the one to believe.
What if my claim is denied outright?
Get the denial reason in writing, then answer it directly with photos, an itemized estimate and documentation of the cause. Request a re-inspection with your roofer present, and note that most policies allow about a year from the date of loss to dispute formally.
Sources
- Reasons adjuster and contractor roof estimates diverge, including inspection method and commonly omitted line items such as ice and water shield, drip edge and starter strip: roofing industry claims analyses, 2026.
- Average recovery of $7,000 to $8,000 per claim via contractor-backed supplements, and the supplement process: IA Solutions (licensed independent adjusters), 2026.
- 20% to 30% average recovery above the insurer's initial offer when supported by a detailed contractor estimate: industry 2025 claims data as reported by roofing claims resources.
- Dispute process guidance including re-inspection with contractor present, appraisal as a binding process, and the typical one year dispute window: multiple roofing and property claims sources, 2026.
- Qiggz no lead fees positioning: first-party (Qiggz product); see /hire-roofer.
