How to Write a Roofing Insurance Supplement Request

What Is a Roofing Insurance Supplement?

A supplement request is a formal document sent to an insurance carrier requesting additional payment for scope items or pricing discrepancies not included in the original insurance estimate. For roof replacement claims, supplements commonly address missing items like tear-off, underlayment, drip edge, and ice & water shield.

Unlike a dispute or complaint, a supplement is a technical document. It states facts, references standards, and provides justification. The tone should mirror what adjusters use internally: "standard scope," "manufacturer installation requirements," and "code compliance."

Supplement Request Format

Professional supplement letters follow a consistent structure that adjusters expect. Here are the sections every supplement should include:

1. Claim Reference & Overview

Open with the claim number, property address, insurer name, and a one-sentence description of what the supplement addresses. Keep it factual.

2. Scope Discrepancies

List each line item where the contractor estimate and insurance estimate disagree. For each item, show the insurance amount, contractor amount, and the variance. Include a brief technical justification for the contractor's pricing.

3. Missing Scope Items

List items present in the contractor estimate but completely absent from the insurance estimate. For each, include the dollar amount and a technical reason why the item is required — ideally referencing the specific IRC code section.

4. Building Code Compliance

This section is critical. Cite specific IRC code sections that require the missing scope items. Adjusters take code-backed requests more seriously than opinion-based arguments. Common codes for roofing supplements include:

• IRC R905.2.7 — Underlayment required beneath all asphalt shingle coverings
• IRC R905.2.8.5 — Drip edge required at eaves and gables
• IRC R905.2.7.1 — Ice barrier required in cold climate zones
• IRC R905.2.6 — Starter strip required at eave and rake edges
• IRC R806.1 — Attic ventilation requirements
• IRC R905.2.8.3 — Flashing at wall intersections and roof openings

5. Requested Revisions

State the total supplement amount clearly and request a revised estimate. Keep it to one or two sentences. Do not argue or repeat justifications.

Common Mistakes to Avoid

• Argumentative language — adjusters ignore emotional appeals. Stick to facts and standards.
• Missing code citations — without IRC references, missing scope claims are just opinions.
• Vague line items — always include specific dollar amounts and descriptions.
• No variance breakdown — show the insurance amount, contractor amount, and difference for every discrepancy.
• Math errors — double-check that line items sum to your stated total.

How ClaimLeak Automates This

Writing supplements manually is time-consuming and error-prone. ClaimLeak automates the entire process: upload your insurance and contractor estimates, and the system identifies every discrepancy, flags missing scope items, cites the relevant IRC codes, and generates a professional supplement letter — ready to send.