What Is a Roofing Supplement? A Complete Guide for Contractors

A roofing supplement is an additional claim submitted to the insurance company for line items that were missed, undervalued, or excluded from the original insurance estimate. For roofing contractors, supplements represent one of the most significant opportunities to recover revenue that would otherwise be lost on every job.

Insurance adjusters typically write their initial estimates quickly, often from the ground or using satellite imagery. The result is an estimate that frequently leaves out code-required items, undervalues labor, or ignores necessary materials. A supplement corrects those gaps with proper documentation, pricing, and code references.

Contractors who submit supplements consistently recover 20-40% more per claim compared to those who accept the original estimate without question. On an average residential job, that translates to $7,000-$8,000 in additional approved funds.

Why Do Insurance Estimates Come Up Short?

Insurance estimates come up short because the initial inspection rarely captures every item required to complete the job to code. Adjusters may spend as little as 30 minutes on a property, and their scope often focuses on the most visible damage rather than the full scope of work.

Common reasons estimates fall short include:

• Time constraints. Field adjusters handle dozens of claims per week and may not climb every roof or inspect every detail.
• Satellite-based estimates. Many carriers now write estimates using aerial imagery, which cannot capture conditions like valley flashing, underlayment, number of layers, inadequate ventilation, or damaged flashing.
• Outdated pricing. Insurance estimates sometimes use pricing that does not reflect current material and labor costs in your market.
• Omitted code requirements. Building code upgrades are frequently left off initial estimates, even when local code mandates them.
• Missing components. Items like ice and water shield, starter strip, drip edge, pipe boot replacements, and step flashing are regularly excluded.

Understanding why estimates are short helps you approach the supplement process with the right documentation from the start.

How Does the Supplement Process Work?

The supplement process follows a straightforward sequence: identify what was missed, document it thoroughly, price it accurately in Xactimate, and submit it to the insurance carrier with supporting evidence.

Here is how it works step by step:

1. Review the original estimate. Compare the carrier's scope of work against what the job actually requires. Identify every missing or undervalued line item.
2. Document the discrepancies. Take detailed photos, measurements, and notes that prove each additional item is necessary. Reference applicable building codes.
3. Build the supplement in Xactimate. Xactimate is the insurance industry's standard estimating software. A well written estimate in Xactimate to match the format carriers expect goes a long way. Each line item needs the correct category, selector, and pricing.
4. Submit to the carrier. Send the supplement package to the insurance company's claims department along with all supporting documentation.
5. Follow up consistently. Carriers rarely approve supplements on the first contact. Persistent, professional follow-up is essential. At IA Solutions, we make our first follow-up call 7 days after submission, then follow up every other business day until there is movement on the file.
6. Negotiate if needed. Some line items may require additional justification or a re-inspection. Be prepared to support every item with documentation and code references.

The entire process typically takes 2-4 weeks from submission to approval, depending on the carrier and the complexity of the claim.

What Is Xactimate and Why Does It Matter for Supplements?

Xactimate is the estimating software used by the majority of insurance companies in the United States to price property damage claims. Developed by Verisk, Xactimate contains a database of material and labor costs organized by geographic market, updated monthly.

Xactimate matters for supplements because insurance carriers expect to receive estimates in Xactimate format. If you submit a supplement using a different format, such as a handwritten estimate or a generic spreadsheet, most carriers will reject it outright or not evaluate it the same way.

Writing an accurate Xactimate estimate requires training and experience. Each line item must use the correct category code, selector, and unit of measurement. Pricing must match the carrier's market-specific database. Errors in any of these areas can delay approval or result in denied line items.

Many roofing contractors do not have Xactimate licenses or the training to write supplements themselves. This is one of the primary reasons contractors partner with supplement companies like IA Solutions. Our licensed Independent Adjusters write every supplement in Xactimate with the correct codes, pricing, and formatting that carriers require.

Learn more about our Xactimate estimating services.

What Is Overhead and Profit, and When Should It Be Included?

Overhead and profit (O&P) is a standard line item in insurance estimates that compensates the general contractor for managing and coordinating a roofing project. O&P is calculated using the industry-standard 10 and 10 formula: 10% overhead plus 10% profit, applied to the total cost of the estimate.

O&P should be included on any claim where three or more trades are involved. For example, a roofing job that also requires gutter replacement and interior drywall repair involves three distinct trades, which qualifies for O&P.

Insurance carriers frequently deny O&P on roofing claims, arguing that the job involves only one trade. In many cases, this denial is incorrect. A thorough review of the scope of work often reveals multiple trades, such as roofing, carpentry (for decking replacement), painting (for touch-up work), and sheet metal (for custom flashing).

O&P can add 20% or more to the total claim value. On a $30,000 roofing claim, that is an additional $6,000. This is one of the most commonly missed items on insurance estimates, and one of the most valuable to recover through supplementing.

For a deeper look at O&P, read our complete guide to overhead and profit.

How Much Money Can a Supplement Recover?

Supplements recover an average of $7,000-$8,000 per residential roofing claim. The exact amount depends on the size of the roof, the extent of missed items, and the carrier's responsiveness.

Here is a comparison of typical outcomes:

| Scenario | Original Estimate | After Supplement | Additional Recovery | |----------|------------------|-----------------|-------------------| | Standard shingle roof (25 squares) | $12,000 | $16,500 | $4,500 | | Roof with code upgrades needed | $15,000 | $22,000 | $7,000 | | Roof with O&P owed | $18,000 | $24,500 | $6,500 | | Complex roof with multiple trades | $25,000 | $35,000 | $10,000 |

These figures represent typical ranges based on IA Solutions' experience handling over 10,000 supplements. Your results will vary based on the specifics of each claim.

For a contractor handling 75-100 roofing jobs per year, consistent supplementing can add up to $600K in annual profits. That revenue is already owed to you for work you are performing. The supplement process simply ensures the insurance company pays for the full scope.

Who Writes Roofing Supplements?

Roofing supplements are written by licensed Independent Adjusters with Xactimate-certifications. The best supplement writers combine insurance industry knowledge with hands-on roofing experience.

At IA Solutions, every supplement is written by a licensed Independent Adjuster with a minimum of 5 years of field experience. Most of our adjusters have 15 or more years in the industry. This experience matters because it means we know exactly what carriers look for, what documentation they require, and how to present a supplement that gets approved.

Some roofing contractors attempt to write supplements in-house. While this is possible, it requires an Xactimate license (approximately $200-$300 per month), training on the software, and time spent away from sales and production. Then there's the follow up. Tons of calls trying to chase down the adjusters for updates and praying they get it right the first time. Did you know the average claim needs 2-3 separate supplements submitted to get an accurate scope. Many contractors find that partnering with a supplement company is more cost-effective than building an internal supplement team.

How Long Does It Take to Get a Supplement Approved?

Supplement approval timelines vary by carrier, but most supplements receive a response within 2-4 weeks of submission. Some carriers respond faster, while others may take 30 days or more.

IA Solutions submits completed supplements within 48 hours of receiving your claim documentation. From there, we handle all carrier communication and follow-up. Our follow-up schedule is consistent: first contact 7 days after submission, then every other business day until the carrier responds.

The most common reasons for delays include:

• The carrier requests a re-inspection
• Additional documentation is needed for specific line items
• The claim is assigned to a new adjuster mid-process
• The carrier's review queue is backed up

Persistent, professional follow-up is the single most important factor in getting supplements approved quickly. Carriers prioritize files that have active communication.

Should Every Roofing Job Be Supplemented?

Not every job needs a supplement, but most do. In our experience, roughly 85-90% of insurance estimates leave money on the table. The question is not whether items were missed, but how many.

You should consider supplementing when:

• The estimate does not include code-required items (ice and water shield, proper ventilation, drip edge)
• O&P was denied on a job involving timing and coordination
• Material or labor pricing is below current market rates
• Necessary items like pipe boot replacements, step flashing, or satellite dish resets were excluded
• Decking replacement was not included despite visible damage

If you are unsure whether a specific claim is worth supplementing, IA Solutions offers a complimentary supplement review valued at $150. We will review your estimate and let you know exactly what was missed and how much additional recovery is possible.

Get your free supplement review

How Do You Get Started with Supplements?

Getting started is simple. You need three things: the insurance carrier's original estimate, your measurements or inspection report, and photos of the roof and any damage.

Send those documents to IA Solutions, and our team will review the claim, identify missed items, and build a complete supplement in Xactimate. We handle the submission and all follow-up with the carrier.

You focus on selling jobs and managing production. We handle the supplement process from start to finish.

Have questions about how supplements work? Visit our FAQ page or contact us directly to speak with a licensed Independent Adjuster.

Schedule a Free Consultation | Call (850) 498-4891