Writing a roofing supplement that gets approved.
A supplement is not a negotiation tactic. It is a documented statement that the job requires work the original scope could not see — and the ones that get approved all look the same.
The one rule this entire page runs on
A supplement exists for one reason: work that is genuinely required and genuinely performed, that the original estimate did not include. Tear-off exposes a second layer. The decking is spaced or rotten. The adopted code requires a component the estimate omitted. Those are real costs, and the carrier owes them.
Everything else is fraud with better vocabulary. Billing a line item you did not perform. Inflating a quantity. Claiming a second layer that was not there. Adding “damage” found after the adjuster left that you cannot show existed before. Building the homeowner’s deductible into the number. These carry criminal exposure and license loss, and they are the reason legitimate supplements from honest roofers get scrutinized as hard as they do.
The working test: for every line you add, you should be able to point at a photograph, a measurement, a code section, or a manufacturer instruction and say “here is why, and here is what it cost.” If you cannot, the line does not go in.
Why the gap exists
The original scope was written blind. That is normal.
Roofers sometimes read a short scope as bad faith. Usually it is not. An adjuster writes from what could be seen on the day — often from the ground, from an aerial measurement report, or from a twenty-minute walk during a week where they are handling forty files. Four things are effectively invisible at that moment:
- What is under the shingles. Layer count and decking condition do not exist as facts until tear-off.
- What the local code requires. Adopted code editions and local amendments vary jurisdiction to jurisdiction, and a national estimating template does not know yours.
- What the manufacturer requires. Installation instructions are the governing document for a valid warranty, and they differ by product line.
- Accessories and back-slope conditions. Detached items, low-slope sections that price differently, and damage on the elevation nobody photographed.
So the supplement is not an adversarial act. It is the mechanism the process provides for closing a gap that the process itself creates. Treat it that way in your tone and your file, and your approval rate goes up.
Anatomy
Five parts. Every approved supplement has all five.
Weak supplements are a list of line items and a total. Strong ones answer the desk adjuster’s questions before they are asked, so the file can be approved without a phone call.
The line item, in their language
Name it the way the carrier’s estimating platform names it, with the same unit of measure. “Ice & water barrier — SF” lands. “Extra waterproofing at the bottom” does not. If you are unsure of the exact line, quote the description from their own estimate and add yours beneath it.
Why it is required — the authority
Every added item traces to one of exactly four authorities: a field condition (found at tear-off), the adopted building code, the manufacturer’s published installation instructions, or an omission from the carrier’s own scope. Say which one, in one sentence. Vague necessity is what gets a file kicked back.
The proof
Photograph, measurement, code section, receipt, or the manufacturer’s document. Label each exhibit with the address, the date, and the slope or elevation. A desk adjuster reviewing sixty files should not have to work out which roof they are looking at.
The quantity, and how you measured it
State the number and the method — “92 LF of eave, measured on site and confirmed against the aerial report”. Quantity disputes are the majority of supplement disputes, and showing your method resolves most of them without a second round.
The ask, in plain terms
One sentence: what you want added, at what quantity, and that you are available to walk it. No ultimatums, no threats of appraisal in the first submission. You are asking a person with a queue to say yes to something well-documented.
Reference
Line items that get legitimately missed — and how each one goes wrong.
The left column is why an honest roofer supplements it. The right column is the version that ends careers. Both are on this page on purpose.
| Line item | When it is legitimate — and what proves it | What makes it fraud |
|---|---|---|
| Ice barrier at eaves and valleys | Where the adopted code requires an ice barrier and the estimate omitted it. Proof: the adopted code section, plus in-progress photos of the membrane installed to the required distance inside the exterior wall line. | Billing full-roof coverage when you installed it only at eaves and valleys, or billing it at all in a jurisdiction that does not require it and where you did not install it. |
| Drip edge | Required at eaves and rakes under recent code editions for asphalt shingle roofs, and frequently absent from the original scope. Proof: code section, photo of the existing condition, photo of new metal installed. | Billing new drip edge on runs where you reused the existing metal, or billing eave and rake footage you did not install. |
| Starter course | Manufacturer installation instructions generally require a starter at eaves and often rakes, and some product lines will not warrant a field-cut substitute. Proof: the manufacturer’s current published instructions plus product photos. | Billing manufactured starter strip when you cut three-tabs on site. |
| Ridge and hip cap | Routinely under-measured, especially on cut-up roofs. Proof: your own linear-foot takeoff by run, cross-checked against the aerial report. | Measuring hips as ridge to reach a higher unit price, or padding linear feet that no one will climb up to recount. |
| Additional layer tear-off and disposal | A second or third layer that was not visible before tear-off. Proof: a photo at a rake edge or penetration showing the stacked layers, taken before the layers were removed. | Claiming a second layer that did not exist. This one is easy to disprove from your own dumpster and disposal weight tickets. |
| Decking replacement | Sheets actually replaced because of rot, delamination, or spacing that will not hold fasteners. Proof: photos as found, a count, and the material receipt. | A flat “decking allowance” billed regardless of what was replaced, or a sheet count higher than what you bought. |
| Steep and high charges | The actual pitch and story count, applied only to the areas that qualify. Proof: pitch gauge photo per slope and an elevation photo showing height. | Applying a steep charge to the whole roof when one slope qualifies, or overstating pitch. |
| Detach and reset — satellite, solar, gutters, lightning protection | Items you physically removed and reinstalled to complete the roof. Proof: before, removed, and reinstalled photos of the same item. | Billing D and R on items you worked around, or on items you damaged and quietly replaced without disclosing it. |
| Ventilation components | Ridge vent or box vents damaged by the loss, or required to restore the ventilation the assembly had. Proof: damage photos and a count matching the original configuration. | Upgrading a homeowner to a better ventilation system than existed and billing the carrier for the improvement without ordinance-or-law coverage or the homeowner paying the difference. |
| Permit and inspection fees, disposal | Actual fees paid and actual disposal incurred. Proof: the receipt. This is the easiest supplement to get approved and one of the most frequently forgotten. | Estimated round numbers with no receipt behind them, or fees for a permit you never pulled. |
| Overhead and profit | Contested and carrier-dependent. The defensible version is a job genuinely requiring coordination of multiple trades — not a roof-only replacement. Proof: the trades involved and what coordinating them required. | Requesting it reflexively on every file. It is not fraud on its own, but it teaches a desk adjuster to distrust the rest of your submission — which costs you the items you were owed. |
Interactive
Supplement documentation checklist.
Tick what you actually have. It builds a documentation index you can paste at the top of your submission — and, more usefully, it shows you what is missing while you can still go back and photograph it.
Claim file readiness
Nothing documented yetRuns entirely in your browser. Nothing is uploaded, stored, or sent anywhere.
After you send it
Submission, follow-up, and knowing when to stop.
Submit once, complete. A supplement that arrives in three instalments gets reviewed three times by three people. Send one package: cover narrative, itemised request with quantities, labelled exhibits, receipts.
Follow the ladder, in order. Field adjuster first — they saw the roof. Then the desk adjuster who owns the file. Then a supervisor or team lead. Escalating past someone before giving them a chance to say yes makes the next person less inclined to.
Put the date on everything. Note when you sent it, to whom, and what you asked. Most files that stall are not denied, they are simply not being looked at, and a dated, polite follow-up moves more of them than pressure does.
When it is denied
Read the denial for what it actually says. There are three different denials wearing the same word:
- “We do not agree this is required.” A scope disagreement. Answerable with a better authority — the specific adopted code section, or the manufacturer’s current instruction page.
- “We do not agree on the quantity.” A measurement disagreement. Answerable by showing your method and offering to re-measure together.
- “This is not covered.” A coverage decision about the policy — not about your roof. That conversation belongs to the homeowner, and if they want to push it, to a licensed public adjuster or an attorney, not to you.
Many policies contain an appraisal clause for resolving disputes over amount. It is the homeowner’s right to invoke, not yours, it resolves amount rather than coverage, and it has real cost and timeline. Raising it as a threat in an early submission mostly signals that your documentation was thin.
And sometimes the right answer is to stop. If an item cannot be documented, if the condition genuinely was not there, or if pursuing it means characterising the job as something it was not — that is where you drop it. One line item is never worth a fraud allegation, a license, or your standing with a carrier you will be filing with every storm for the next decade.
The supplement field kit.
A printable version of the checklist above for the truck, a one-page supplement narrative outline, and the annotated scope-sheet layout — the format that makes a desk adjuster’s job easy. Tell us where to send it.
Goes to a real inbox you can reply to. We don’t sell or share your address.
Build the file
Tools behind the paperwork.
Keep reading
Rest of the roofing portal.
Quick answers
Supplement questions.
How many supplements is too many on one claim?
There is no number. There is only whether each item is documented. One well-supported supplement submitted after tear-off is normal. A trickle of small requests over six weeks looks like fishing even when every item is legitimate — which is an argument for waiting until the roof has told you everything and sending one complete package.
Should I send my estimate or theirs?
Both. Annotate their scope sheet with what is missing and the quantity you measured, and attach your own line-item estimate. It turns the conversation from your opinion against theirs into two documents that can be compared.
What if the homeowner asks me to add something that was already damaged before the storm?
No. Pre-existing damage and wear are not part of the loss, and putting them in makes every other line in your file suspect. If they want the work done, price it as a separate change order they pay for directly.
Is asking for overhead and profit aggressive?
Not inherently — but it is contested and carrier-dependent, and requesting it reflexively on straightforward roof-only jobs trains a desk adjuster to discount everything else you send. Ask where the job genuinely required coordinating multiple trades, and say why.
Do I need software to write one?
No. A clear narrative, an itemised list with quantities and how you measured them, labelled photos, and receipts will out-perform a badly assembled software export. Format is much less important than the four authorities and the proof.