Insurance supplements are one of the most misunderstood—and most valuable—parts of the storm restoration roofing business. For contractors who get the process right, supplements can add 15–30% to an already-approved job value. For those who don't, they leave thousands on the table on every storm claim.
This guide covers everything you need to know about roofing insurance supplements: what they are, when to request them, how to document them, and how to track them across dozens of active jobs.
What Is an Insurance Supplement?
A supplement is an additional claim request submitted after the initial insurance estimate is approved. It covers work, materials, or line items that were missed, underpriced, or not included in the original adjuster's scope of loss.
Think of it this way: the adjuster estimates the cost to restore your customer's roof based on what they see at inspection. They may miss items like:
- Overhead and Profit (O&P) — many adjusters omit O&P on roofing projects even when it's clearly warranted
- Code upgrades — if local building code requires drip edge, ice and water shield, or upgraded decking, that's a supplement
- Starter strip — frequently omitted from initial estimates
- Ridge cap material and installation — often underpriced vs. actual cost
- Permit fees — adjusters regularly omit permit costs
- Dumpster/haul-away fees
- Crew safety equipment — tarping, scaffolding on steep-slope roofs
- Underlayment upgrades driven by code requirements
Each of these is a legitimate supplement item. The insurance company is obligated to pay for the full cost to properly restore the property to pre-loss condition. Your job is to document it correctly and request what's owed.
When to Submit a Supplement
There are two types of supplements: pre-production and post-production.
Pre-Production Supplements
Submitted before installation begins. These are ideal because you're requesting additional funds before doing the work — so if denied, you can negotiate before committing resources. Common items: code upgrades, permit fees, O&P, material cost increases since the initial estimate.
Post-Production Supplements
Submitted after the job is complete. These cover items discovered during installation that weren't apparent during inspection — rotted decking, unexpected flashing complexity, additional square footage discovered. Requires thorough photo documentation during installation.
How to Document a Supplement Request
Documentation is everything. A supplement request without proper documentation will be denied. Here's what you need for each item:
- Code requirements: Printed local code language or a letter from the building department specifying the requirement
- Material cost differences: Supplier invoice or current price quote showing the actual cost vs. what was estimated
- Additional damage discovered during installation: Photos taken during tear-off showing the condition before covering
- O&P: A brief written explanation of why the project requires general contractor coordination (managing crews, materials, permits, inspections)
- Permit fees: The actual permit receipt or a screenshot of the permit fee schedule from the municipality
Writing a Supplement Letter
Your supplement letter should be professional, specific, and evidence-based. Avoid emotional appeals — stick to facts, codes, and costs. A strong supplement letter includes:
- The claim number, insured name, and property address at the top
- A brief opening: “We are submitting a supplement request for items not included in the original estimate dated [date].”
- Each supplement item listed separately with: item name, reason for inclusion, supporting documentation reference, and the amount being requested
- Total supplement amount and a closing request for written approval
Keep it factual, keep it organized. Adjusters review dozens of supplements — the clearer you make it, the faster it gets approved.
Common Items Adjusters Miss
These are the most frequently missed supplement items — the ones experienced restoration contractors know to check on every job:
- O&P (10% overhead + 10% profit) — Most adjusters include it on interior claims automatically but resist on roofing. It should be included whenever you're coordinating a general scope of work.
- Starter strip — Often missing from estimates entirely
- Step flashing — Underpriced or missing in initial scopes
- Drip edge (all edges) — Many adjusters only include one slope
- Ice and water shield — Required by code in many climates, often omitted
- Ridge cap (labor separate) — Sometimes estimated as materials only without installation
- Pipe boot flashings — Frequently underpriced
- Satellite dish detach/reset
- Material price increases — If material costs have risen since the estimate date, you can supplement the difference with a supplier quote
Tracking Supplements Across Multiple Jobs
One supplement is manageable. Twenty supplements across different carriers, different adjusters, and different approval timelines is a system problem. Without a way to track the status of every open supplement, you will lose money — requests expire, follow-ups get missed, approvals slip through.
For each open supplement, you need to know:
- What was requested (amount and items)
- When it was submitted
- Which carrier and adjuster it went to
- Current status (pending / in review / approved / denied / partial approval)
- Amount approved (if partial)
- Next follow-up date
A CRM with built-in supplement tracking (like Ketterly) keeps all of this organized per job. You can see every open supplement across your entire book of business in one report, sorted by status and days pending.
How Long Does a Supplement Take?
Typical timelines vary by carrier and market conditions. In non-catastrophe conditions: 2–4 weeks for simple supplements, 4–8 weeks for complex or disputed ones. In catastrophe-declared markets after a major storm event, timelines can stretch to 8–16 weeks as carriers are overwhelmed.
Follow up at the 10-day mark if no response, then every 5–7 business days thereafter. Always follow up in writing (email) so you have a record.
Key Takeaways
- Supplements are the most consistently under-claimed revenue opportunity in storm restoration
- Document everything during inspection and installation — photos, code references, receipts
- Submit supplements in writing with organized supporting documentation
- Track every supplement in a system — you cannot manage this in your head or in email
- Follow up consistently and professionally — persistence with documentation wins
Go Deeper: Insurance Supplement Resources
- What Is a Roofing Insurance Supplement? — Plain-language explanation of when and why to file a supplement
- How to Document a Roof for an Insurance Claim — Photo and field documentation checklist
- Insurance Supplement Items Adjusters Miss — The most commonly overlooked line items on every job
- How to Write a Roofing Supplement Letter — Template and best practices for supplement requests
- Xactimate for Roofers: Beginner Guide — How to read and work with adjuster estimates
- Insurance Supplement Approval Timeline — What to expect from major carriers, carrier by carrier
- How to Track Supplement Status Across 50+ Jobs — System and tools for managing active supplements at scale
- How to Negotiate with Insurance Adjusters — Strategies, common objections, and what not to do
- Roofing Supplement Software Comparison — Tools rated for storm restoration companies
- Ketterly Insurance Supplement Tracking — Supplement log, status pipeline, and document storage built into every Ketterly job record