Most homeowners think the adjuster's estimate is the final word. It almost never is.
Your roof got hit. An adjuster came out, walked it, took some photos, and a few days later an estimate showed up in your inbox with a number at the bottom. That number felt official — it came from the insurance company, on insurance company letterhead, with line items and codes and math.
Here's what nobody tells you: that estimate is a first pass. It was written by a person who spent maybe forty minutes at your house, working from a checklist, under pressure to move on to the next claim. They are not trying to cheat you. They are working fast, and fast work misses things.
A supplement is the formal process of going back to the insurance company and saying: here are the items your estimate left out, here is the documentation proving they're needed, and here is what they cost. It is not a complaint. It is not a dispute. It is a normal, expected, built-into-the-system part of how insurance claims work — and if nobody files one on your claim, the money simply stays with the insurance company.
The estimate is an opening position, not a final offer
Insurance estimates are written in software called Xactimate, which prices work by line item. Every single thing that has to happen to your roof needs its own line — the shingles, the underlayment, the drip edge, the ridge cap, the starter course, the vents, the flashings, the tear-off, the disposal.
A complete roof replacement can run fifty or sixty line items. When an adjuster writes an estimate in the field in under an hour, some of those lines don't get written. Not out of malice — out of volume.
The insurance company pays what's on the estimate. So the question that decides your claim isn't "is my damage covered." It's "is everything that needs to happen actually written down."
What actually gets missed
The same items go missing over and over, because they're the ones you can't see from the ground.
Ridge cap is the single most commonly underpaid item on a roof. Adjusters routinely write it at a lower grade than what's actually on the house, or write the wrong quantity.
Drip edge and starter course get left off entirely on a regular basis, even though you physically cannot install a roof without them.
Steep and low-slope charges apply when part of the roof is too steep to walk or too flat for shingles. Both cost more to work on. Both need their own line.
Layers. If your roof has two layers of shingles, the second one costs money to tear off and haul away. If it isn't documented before it comes off, it's gone and unprovable.
Code-required items — ice and water barrier, decking thickness, ventilation — vary city to city. An adjuster covering a wide territory won't know every local requirement.
None of these are gray areas or judgment calls. They're the physical requirements of installing a roof correctly. They just have to be documented and asked for.
Documentation is the entire game
A supplement is not an argument. It's a package.
When we file one, it contains the specific line items being requested, the reason each one is needed, and photographs proving the condition. That's it. No rhetoric, no pressure, no "we think you owe us more."
This matters because of how the adjuster's side works. The adjuster reviewing your supplement often has to get manager approval to release additional money. If your supplement is well documented, they forward it and it gets approved. If it's thin — vague photos, missing overview shots, items requested with no proof — they have to come back and ask, which means days of delay, and sometimes a denial that's really just a request for information wearing a costume.
We've had adjusters tell us directly that they've processed twenty of our supplements without a single issue, specifically because the photos were always there. That's not a compliment about our personalities. That's the difference between getting paid and getting a request for more information.
What it means for you
If you're a homeowner: you are not being difficult by asking whether your estimate is complete. You're doing the thing the system assumes someone will do.
If you're a contractor: this is the difference between eating the cost of items the insurance company didn't write, and getting paid for the work you're actually doing. Every unwritten line item comes out of your margin or the homeowner's pocket.
The first estimate is where the claim starts. Not where it ends.
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