Insurance Estimate Lower Than Your Contractor's Bid — What to Do

The insurance estimate is written from a 20-minute rooftop inspection, generic assumptions, and last month's regional price list. Your contractor's bid is written after measuring the actual roof, looking at the actual decking, pricing at this month's supply invoices, and adding labor rates their crew will accept.

The gap often comes from three places: missing line items on the insurance estimate, quantity errors (measurements off by a few squares), and unit-price gaps where the regional price list is behind current material costs.

Signing a contract at the low insurance number to 'just get started' locks you in. If tear-off reveals rotted decking or your contractor discovers the estimate missed drip edge, you own the difference personally.

The correct order is: get the estimate corrected first, then sign the contract at a price the corrected scope actually covers.

'Supplement' is the industry word for 'update the estimate to match reality.' Your contractor writes a supplement identifying: (a) line items missing from the insurance estimate that are required for a complete job; (b) quantity corrections with a measurement report; (c) unit-price corrections where documented (invoice, supplier quote, published price list).

The supplement is sent to your claim rep with photos and documentation. Re-review timing varies by carrier and how complete the submission is. Well-documented supplements are typically processed faster.

Supplements get approved on documentation, not argument. What works:

If your supplement is denied and you disagree, a common escalation ladder is: (1) request a re-inspection with your contractor present; (2) ask for the claim to be reviewed by a claims supervisor, in writing; (3) consider invoking your policy's Appraisal clause if one is included (each side picks an appraiser, they pick a neutral umpire, and the umpire's decision on the amount of loss is typically binding under that clause); (4) file a complaint with your state Department of Insurance, which typically prompts a formal response and re-review.

Appraisal is generally not litigation and is available under many — but not all — Replacement Cost policies. Read your specific policy language and consider consulting a licensed attorney or public adjuster before invoking it.

For a straightforward roof-only supplement, most homeowners can handle the process themselves with a good contractor. Public adjusters usually take 10–15% of the settlement and are more common on larger, mixed-trade claims (roof + interior water + contents).

An attorney may be worth it when the carrier appears to be acting in bad faith — unexplained denials, ignored requests, or misrepresentation of policy language. Some state statutes allow homeowners to recover attorney fees if the carrier is found to have handled the claim improperly; the specifics vary by state.