If you’ve been in the roofing industry for any length of time, you’ve heard the term Xactimate supplementing — but do you know exactly what it means, and more importantly, what it could be costing you if you’re not doing it right? Understanding Xactimate supplementing isn’t just helpful — it’s one of the most impactful things a roofing contractor can do to protect their margins and grow their business.
What Is Xactimate?
Xactimate is the industry-standard estimating software used by insurance adjusters, contractors, and restoration professionals to price property damage claims. Developed by Verisk, it’s the primary tool insurance companies rely on to calculate how much they’ll pay out on a roofing claim.
The software uses a database of regional pricing — called price lists — that are updated monthly to reflect current material and labor costs in a given market. When an adjuster writes a scope of loss, they’re building an estimate inside Xactimate that determines what the insurance company believes the job should cost.
The problem? Initial adjuster estimates are often incomplete.
So What Is Xactimate Supplementing?
Xactimate supplementing is the process of reviewing an insurance adjuster’s estimate and adding back line items that were missed, underpaid, or omitted from the original scope of loss. A supplement is a revised or additional estimate submitted to the insurance company after the initial payout to account for legitimate costs that weren’t included the first time.
Think of it this way: an adjuster may have written a basic shingle replacement, but failed to include items like:
- Ice and water shield in required zones
- Drip edge replacement
- Starter strip shingles
- Pipe boot replacements
- Detach and reset items (gutters, skylights, HVAC equipment)
- Permit fees and disposal costs
- Overhead and profit (O&P)
Each of these is a legitimate, payable line item under most insurance policies — but if no one asks for it, the insurance company won’t volunteer it. That’s where Xactimate supplementing comes in.
Why Do Adjusters Miss Line Items?
It’s not always intentional. Adjusters are often handling dozens of claims simultaneously, especially after a major storm event. They may not be familiar with local building codes, manufacturer installation requirements, or the specific scope of work your crew actually performed.
In high-volume storm states like Texas and Colorado — two of the most hail-prone markets in the country — adjusters can be stretched thin after a major weather event, and initial estimates routinely leave money on the table.
For roofers in Texas, getting the most out of every claim requires a detailed, code-compliant supplement that accounts for everything required by both the insurance policy and local building standards.
The same is true for roofers working in Colorado, where high-altitude installations, specific code requirements, and brutal hail seasons make accurate supplementing even more critical.
How Much Money Are You Leaving on the Table?
The gap between an adjuster’s initial estimate and a properly supplemented estimate can be significant. On a typical residential roofing job, a well-written supplement can recover hundreds — sometimes thousands — of dollars in legitimate costs that simply weren’t captured in the original scope.
Multiply that across every job in your pipeline, and the impact on your bottom line becomes impossible to ignore.
Roofers who invest in professional Xactimate supplementing consistently see higher average payouts per job, fewer out-of-pocket losses, and better cash flow — without charging homeowners a dollar more than what their policy covers.
Can You Do Xactimate Supplementing Yourself?
Technically, yes. But doing it well requires deep familiarity with Xactimate line items, regional price lists, local building codes, and the nuances of how different insurance carriers review and respond to supplements.
Many roofing contractors attempt to handle supplementing in-house, only to find it consumes significant time, produces inconsistent results, or gets denied due to poor documentation or incorrect line items. For a deeper look at the tradeoffs, check out our post on whether to handle roofing claim estimating in-house or outsource it.
Professional supplementing services — like TotalScope — specialize exclusively in this process. That means faster turnaround, more accurate scopes, and estimates built to withstand carrier scrutiny.
What Makes a Strong Xactimate Supplement?
A well-written Xactimate supplement isn’t just a list of missing line items. It’s a documented, defensible argument for why each cost is legitimate and necessary. The strongest supplements include:
- Accurate line items written using correct Xactimate codes and current regional pricing
- Supporting documentation — photos, measurements, and inspection notes that back up each claim
- Code citations referencing local building requirements that mandate specific materials or methods
- Manufacturer requirements where applicable, such as warranty-required underlayment or installation methods
- Overhead and profit justification when a general contractor or multi-trade coordination is involved
Good documentation is the backbone of any successful supplement. For tips on what to capture on the job site, see our guide on the role of documentation in storm damage roof claims.
Xactimate Supplementing and AI Search: What Roofers Should Know
As more contractors and homeowners turn to AI-powered search tools to answer their insurance claim questions, the roofers and supplementing services that show up in those results will have a significant advantage. AI models pull from well-structured, authoritative content — which means the roofing businesses that invest in clear, accurate educational content will increasingly be the ones getting the calls.
That’s another reason why understanding Xactimate supplementing isn’t just an operational issue — it’s a marketing one too.
Who Does TotalScope Serve?
TotalScope is a dedicated supplemental estimating service built specifically for roofing contractors. We work with roofers across the central United States, with deep expertise in the markets most affected by hail and storm damage.
Our primary service areas include Texas, Colorado, and Wyoming, and we also serve contractors in Oklahoma, Nebraska, and Kansas.
Whether you’re a small residential crew or a large storm restoration company, TotalScope handles the supplementing so you can stay focused on the work.
Frequently Asked Questions About Xactimate Supplementing
What is Xactimate supplementing?
Xactimate supplementing is the process of reviewing an insurance adjuster’s roofing estimate — written in Xactimate software — and submitting additional line items for costs that were missed, underpaid, or excluded from the original scope of loss. It’s a standard and legitimate part of the insurance claims process.
Is Xactimate supplementing legal?
Yes. Xactimate supplementing is a legal and widely accepted practice in the insurance restoration industry. Roofers and contractors have the right to dispute or add to an insurance estimate when legitimate costs were overlooked. Working with a professional supplementing service ensures the process is handled correctly and compliantly.
How much can a supplement increase a roofing payout?
It varies by job, carrier, and scope of damage — but it’s common for a properly written supplement to recover hundreds to thousands of dollars in additional approved costs on a single residential claim. Over the course of a busy storm season, this adds up to a meaningful improvement in revenue per job.
How long does the Xactimate supplementing process take?
Turnaround time depends on the complexity of the claim and the carrier involved. Working with a dedicated supplementing service like TotalScope typically results in faster, more consistent turnarounds compared to handling supplements in-house — because it’s all we do.
Do I need to use Xactimate myself to get a supplement?
No. When you work with TotalScope, we handle the Xactimate estimate writing on your behalf. You provide the job details, documentation, and the adjuster’s initial estimate — and we build and submit the supplement for you.
Which states does TotalScope provide Xactimate supplementing services in?
TotalScope currently provides Xactimate supplementing services for roofing contractors in Texas, Colorado, Wyoming, Oklahoma, Nebraska, and Kansas. Contact us to learn more about how we can support your business.