Reference Guide

What Is Supplement Analysis for Roofing Contractors?

A complete explanation of how supplement analysis works, what items carriers commonly miss, and how roofing contractors recover thousands of dollars per claim.

The short definition

Supplement analysis is the process of comparing a roofing contractor's scope-of-work estimate against the insurance carrier's Explanation of Review (EOR) to identify line items that were missed, underpaid, or incorrectly scoped.

The output of the analysis is a supplement packet — a formal submission to the carrier requesting payment for the identified items. The contractor reviews the packet and submits it to their adjuster.

Supplement analysis is not the same as disputing a claim or hiring a public adjuster. It is a structured, evidence-based review of the carrier's math against the contractor's documented scope — identifying items the carrier's estimate simply did not include.

What is an EOR?

An EOR (Explanation of Review) is the document a carrier sends after reviewing a roofing claim. It shows what the carrier agreed to pay for each line item, what was denied, what was adjusted, and the total payout amount.

EORs are typically generated using Xactimate — the same estimating software contractors use. This means a direct line-by-line comparison is possible: the contractor's Xactimate estimate against the carrier's Xactimate EOR.

The gaps between those two documents are where supplement opportunities live.

Why do carriers miss line items?

Carrier adjusters review hundreds of claims. EORs are generated under time pressure using standardized templates. Several categories of items are systematically underrepresented in carrier estimates:

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Code-required items: Local building codes require items like drip edge, ice and water shield, and permits that carriers do not always include by default. The contractor is required by code to install them — the carrier is required to pay for them.
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Overhead and profit (O&P): Standard industry practice includes a 20% markup (10% overhead + 10% profit) for general contractor work on insurance claims. Carriers routinely omit or reduce this figure.
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Waste factors: Roofing materials require cutting and field waste. The correct waste percentage depends on pitch, material, and roof complexity. Carriers frequently apply incorrect (low) waste factors, resulting in insufficient material quantities being approved.
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Incidental items: Satellite dish removal and replacement, pipe jack flashings, soft metals, ridge cap, and starter strip are frequently absent from carrier estimates despite being genuine line items in the scope of work.
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Trade-specific scope: On combined trades (roofing + gutters + siding), carriers sometimes scope only the dominant trade and miss secondary trade items entirely.

Most commonly missed line items

These are the items Supplement Desk identifies most frequently across roofing claims:

Code	Item	Why it's missed
O&P	Overhead and Profit	Carriers omit or reduce. Industry standard is 10%+10%.
DRIP	Drip Edge	Code-required in most jurisdictions. Not included in default carrier templates.
IWS	Ice and Water Shield	Required by code in cold climates. Carrier templates often default to felt only.
PERMIT	Permit Fee	Contractor-required by municipality. Frequently absent from EOR.
WASTE	Waste Factor Adjustment	Carriers apply flat waste percentages regardless of pitch or complexity.
SAT	Satellite Dish R&R	Present on most residential roofs. Routinely absent from carrier estimate.
PJACK	Pipe Jack Flashings	Per-unit items often estimated as one when multiple are present.
STEP	Step Flashing	Required where roof meets a wall. Missed on complex rooflines.
RIDGE	Ridge Cap (upgraded)	Carriers often price standard ridge cap when high-profile was installed.
STARTER	Starter Strip	Separate line item from field shingles. Frequently missing.

This list is not exhaustive. Every claim has a unique scope. The items above represent the highest-frequency misses across residential roofing claims.

How supplement analysis works

A complete supplement analysis involves five steps:

Document collection

The carrier EOR, the contractor's estimate, and claim photos are collected. These three documents are required. The estimate and EOR must be in comparable formats (both Xactimate-based is ideal).

Line-item comparison

Each line item in the carrier EOR is compared against the contractor's scope. Items present in the contractor estimate but absent from the EOR are flagged as supplement candidates. Items present in both but at different quantities or unit prices are flagged for review.

Code and standard verification

Flagged items are checked against applicable building codes (by jurisdiction), NFVA waste factor standards, and Xactimate pricing conventions to confirm they are legitimate supplement items with defensible support.

Packet assembly

Confirmed supplement items are assembled into a formatted packet with the claimed amount, the supporting evidence (code citation, photo reference, quantity calculation), and the argument for why each item should be funded.

Review, submission, and negotiation

The contractor reviews the findings, sets parameters, and authorizes submission. The analysis service submits the packet to the adjuster on the contractor's behalf and manages carrier responses. The contractor is the final authority — they can close the file or override any step at any time.

How much can contractors recover?

Recovery varies by claim size, carrier, adjuster, and how thorough the original EOR was. Across typical residential roofing claims:

$3,000–$8,000

Average supplement recovery per claim

$60K–$320K

Annual recovery potential for a 20–40 claim/year contractor

48 hours

Typical turnaround from complete documents to packet

These figures represent recoverable supplemental amounts — money the contractor is entitled to under the policy for work that was genuinely performed or required. Supplement analysis does not manufacture claims; it finds what the carrier's initial estimate omitted.

Supplement analysis vs. public adjusters

Public adjusters represent the insured (typically the homeowner) in negotiating with the carrier. They charge 10–15% of the total claim settlement — including amounts the carrier already agreed to pay, not just the supplement amount.

Supplement Desk works directly with the roofing contractor. We analyze the carrier EOR, build the supplement packet, and submit and negotiate on the contractor's behalf under a signed service agreement. Our fee applies only to the supplement recovery — the delta between what the carrier originally offered and what was recovered.

On a $20,000 total claim where $5,000 was recovered through supplementing: a public adjuster might charge 12% of $20,000 ($2,400), while Supplement Desk charges 10% of $5,000 ($500). The contractor keeps significantly more.

Ready to see what your last claim is missing?

Supplement Desk reviews your first claim for free. Upload your carrier EOR, your estimate, and photos — we'll show you exactly what we find.

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