You received your insurance claim approval and reviewed the adjuster's estimate. Something seems off — the total seems lower than your contractor's quote. Before you assume there's a problem, understand that adjuster estimates routinely miss legitimate line items. The supplement process is the standard mechanism for correcting those omissions.
What Is a Supplement?
A supplement is an additional claim submission that requests payment for items not included in the insurer's original scope of repair or replacement. Supplementing is legal, standard, and expected — experienced contractors and public adjusters submit supplements on the majority of residential roof claims.
This is not fraud. Supplements capture legitimate costs that the adjuster's initial estimate missed, priced inaccurately, or applied incorrect quantities to. The goal is accuracy — an estimate that reflects the actual cost of repairing or replacing the covered damage.
Most Commonly Missed Line Items
| Item | Typical Value | Why It Gets Missed |
|---|---|---|
| Disposal / haul-away | $150–$500 | Adjusters sometimes omit or undervalue |
| Overhead and profit (O&P) | 20%+ of labor/material | Applied when GC coordination is involved — often omitted on direct contractor jobs |
| Ice and water shield upgrades | $300–$800 | Code requirements not reflected in initial scope |
| Drip edge / metal edge | $200–$600 | Frequently omitted from initial scope |
| Pipe boot replacements | $50–$150 each | Not counted or counted incorrectly |
| Ridge cap LF (linear feet) | Varies | Measured incorrectly in aerial estimates |
| Additional damaged slopes | Varies significantly | North slopes not accessed in initial inspection |
| Permit fees | $150–$500 | Required by local code; sometimes omitted |
| Premium material pricing | Varies | Adjuster prices standard; contractor uses specified product |
How the Supplement Process Works
- Contractor reviews the adjuster's estimate — line by line against their own scope and pricing
- Discrepancies are documented — specific line items that were missed, underpriced, or miscounted are identified with supporting documentation
- Supplement is submitted to the insurer — typically through the claims adjuster, with written justification and supporting documentation for each item
- Insurer reviews and responds — some items are approved immediately; others may require negotiation or additional documentation
- Approved supplement added to claim payment — either as additional check or adjustment to existing payment
The process can add 2–4 weeks to total claim timeline. On larger claims, the additional payment frequently justifies the wait.
Overhead and Profit: The Most Disputed Item
Overhead and profit (O&P) is a line item reflecting the project management and business overhead costs of the contractor coordinating a restoration project. Insurers apply it when a general contractor (rather than a direct trade contractor) manages multiple trades. The debate between contractors and insurers over when O&P applies is one of the most common sources of supplement disputes.
If your roofing contractor is managing the entire repair project — including coordination with other trades for any interior damage, code upgrades, or accessory work — O&P is typically appropriate. Your contractor can advise whether it applies to your specific claim.
When to Use a Public Adjuster for Supplements
On complex claims or where the initial estimate was significantly below the actual damage scope, a public adjuster can be worth their fee (typically 10–15% of claim). Public adjusters specialize in identifying missed items and negotiating with insurers on your behalf. They're most cost-effective on claims where the supplement opportunity is $3,000+.
The initial adjuster estimate is almost always a starting point, not a final answer. A contractor experienced in insurance claims will review the estimate, identify legitimate missed items, and submit supplements as a standard part of their service. This is expected, legal, and often recovers $500–$3,000 in additional payment on a typical residential replacement.
Our team handles the supplement process as part of our insurance claim assistance service — no extra charge. Get a free inspection or call (800) 555-0100.