Why Every Roofing Contractor Should Be Supplementing

There are two types of roofing contractors when it comes to insurance restoration work. The first type receives the insurance estimate, orders materials, does the install, and collects the check. The second type receives the estimate, reviews it for missing scope, submits a supplement for what wasn't included, and then does the install and collects a larger check. Both do the same quality work. One gets paid more.

Supplementing isn't a trick. It isn't gaming the system. It's the process of requesting payment for legitimate work that the original insurance estimate didn't include. Insurance carriers expect supplements — they have entire departments dedicated to reviewing them. The process exists because everyone in the industry knows that original estimates don't capture everything.

The math is simple

If the average supplement on a residential reroof recovers even a few hundred dollars beyond the original estimate, and your company does a hundred jobs a year, that's tens of thousands of dollars in annual revenue that was already owed to you. You're not charging more than the job is worth — you're collecting what the job actually costs to do properly.

The contractors who supplement consistently have higher revenue per job, better margins, and more money to reinvest in their business. The contractors who skip it are subsidizing the gap out of their own profit.

Why contractors skip it

The most common reason isn't that contractors don't believe in supplementing. It's that the process takes too long. A thorough supplement review means going through the estimate line by line, cross-referencing building codes, looking up Xactimate codes, writing justification verbiage that explains why each item is needed, and packaging it all for submission. For a single job, that can take two to three hours.

If you're a smaller company without a dedicated supplement specialist, that's your project manager or even you personally spending half a day on paperwork instead of running jobs. The ROI math doesn't feel right — especially when you're not sure how much you'll actually recover.

So the supplement gets skipped, or done partially, or done inconsistently. Some jobs get supplemented when someone has time. Most don't. Revenue walks out the door on every single one.

The companies that grow are the ones that supplement every job

Talk to any roofing company that's scaled past a few million in annual revenue doing insurance restoration, and they'll tell you — supplementing is not optional. It's built into their process. They have dedicated people or systems handling it on every single job because the revenue impact is too significant to leave to chance.

This isn't about being aggressive or adversarial with insurance companies. It's about thoroughness. A proper, code-compliant roof installation requires specific materials, specific labor, and specific methods. If the insurance estimate doesn't account for all of it, the contractor either eats the cost or requests the additional payment they're owed. There's no third option.

What makes a good supplement

Adjusters approve supplements that are well-documented. That means three things: the right Xactimate codes so the line item matches their system, a clear justification explaining why the item is needed (building code citation, manufacturer requirement, or physical job site condition), and photo documentation where applicable.

A supplement that says "add drip edge" with no further context is easy to deny. A supplement that says "drip edge is required per IRC R905.2.8.5, was not present on the existing roof per field inspection, and is necessary for a code-compliant installation" with a photo of the eave showing no existing drip edge — that gets approved.

The documentation is the work. Finding what's missing, pulling the right codes, writing the right verbiage, attaching the right photos. That's what takes hours. That's also what separates the contractors who collect from the ones who don't.

Start with your next job

If you're not currently supplementing, start with your next insurance job. Before you order materials, sit down with the estimate and ask: does this cover every item needed for a proper, code-compliant installation? Check for underlayment, starter, drip edge, pipe jacks, flashing. Check that removal is priced where existing material needs to come off. Check that items appear on every elevation where they're needed.

You'll find something. You always do. Submit it with the right codes and justification, and see what comes back. Once you see the first supplement check, the question stops being "should we supplement" and becomes "why weren't we supplementing every job."