This is an operational description of how supplementing works on a restoration crew. It is not legal advice, and it is not public adjusting. What a roofing contractor is permitted to do on a policyholder’s claim varies by state and in several states is restricted by licensing law. Confirm your own rules with your own counsel before adopting any process described here.
Almost every storm claim is written twice. The first version is what an adjuster could see from a ladder on a single visit. The second is what the roof actually turned out to be once the crew opened it up. The gap between those two documents is what a supplement covers, and on a restoration company of any size it is the difference between running profitably and running busy.
The process below is chronological on purpose. Supplements fail far more often on sequence than on merit — the evidence existed, and it existed at the wrong time.
1. Before anyone climbs: read the scope you were given
The adjuster’s estimate is the document the entire job is measured against. Read it before the crew mobilises, not after, and specifically look for what is absent:
- Line items for tear-off of more than one layer
- Decking replacement, and at what board footage
- Ice and water shield where local code requires it, in the footage the code actually requires
- Drip edge, starter course and ridge — commonly omitted entirely
- Steep and high charges where the pitch or storey count warrants
- Detach and reset on solar, satellite, or gutter
- Permit fees and disposal
An estimate missing five of these is not unusual and is not necessarily bad faith. Adjusters price what they can verify quickly across a very large number of properties after a storm event. The scope is a starting position, and it is written as one.
2. On the roof: document as though you will never be back
This is where supplements are won and lost. The rule is simple and almost universally under-applied — photograph the condition, not the work. A picture of new decking going down proves you installed decking. It does not prove the old decking was bad, which is the only thing the carrier is deciding.
What a defensible photo set contains:
- A wide shot establishing the elevation, so every close-up can be located on the building
- The damaged condition in place, with a tape measure or chalk mark for scale
- The second layer visible at a cut edge, if there is one — a single photograph that frequently carries an entire supplement
- Rot, delamination or spacing on decking, shot before anything is removed
- The code condition — the existing ice and water coverage, the existing ventilation — as it was found
- Date and geotag intact, straight off the device
Crews resist this because it slows a tear-off by twenty minutes. Twenty minutes is cheap against a decking line item that gets denied for lack of evidence.
3. Build the supplement as a difference, not a re-estimate
A supplement that re-prices the whole roof invites the carrier to re-litigate everything, including the parts already approved. Submit the delta only. Each line should be traceable to one of three justifications, and it is worth being explicit about which one you are claiming:
| Justification | What it means | What it needs |
|---|---|---|
| Concealed condition | Not visible at the adjuster’s inspection because something covered it | Photographs of the condition in place, before removal, with scale |
| Code requirement | Local code obliges something the original scope did not include | The code citation itself, plus the permit or inspection record that applies it |
| Omitted necessity | A component the installation cannot be completed without, missing from the estimate | Manufacturer installation instructions, which carry real weight because warranty follows them |
Manufacturer instructions are the most under-used of the three. A material warranty conditioned on a starter course is an argument that the starter course is not an upgrade.
4. Submit through the file, not the phone
Every submission should exist in writing and reference the claim number, the date of loss, and the specific line items being added. Phone conversations move things along and prove nothing. When a carrier reassigns a file — which happens constantly after a large event — the new adjuster inherits the documents, not the relationship.
Expect a cycle. First response, partial approval, a request for more detail on two lines, a revised submission. That is a normal path, not a sign the supplement is failing.
Why supplements actually get denied
In practice, refusals cluster into a short list, and almost none of them are about the merits of the roof:
- The evidence is of the repair. Photographs start after the old material was removed.
- The claim is unlocatable. Twelve close-ups with no wide shot, so nothing can be tied to an elevation.
- Code is asserted, not cited. Saying code requires it is not the same as naming the section.
- It arrived after completion. Nothing left to inspect.
- It re-prices approved work. The carrier now reviews the whole file again.
Four of those five are process failures fixed with a checklist and twenty minutes on a roof.
Where supplement work fits in a restoration business
Supplementing is a margin function, not a sales function, and companies that confuse the two staff it badly. It rewards process discipline, documentation habits and patience — the skills of a production coordinator, not a closer. Once a company is past roughly a crew and a half, the supplement role usually needs to belong to someone who is not also selling.
The volume that makes the role worth staffing comes from the front of the funnel. If your storm pipeline is thin, the fix is upstream: see storm damage leads for targeting after an event, and storm restoration leads for building a pipeline that does not disappear between storms. What material is on the roof matters too, and roofing material statistics covers how that distribution varies by region.
The honest summary
A supplement is a documentation product. The roof either had a second layer or it did not; the code either requires the shield or it does not. Nothing in the process changes those facts — it only decides whether you can still prove them a month later. Companies that treat supplementing as negotiation get worse results than companies that treat it as photography.
Frequently asked questions
What is a roofing supplement?
A request to revise an insurance claim upward after the original scope turned out to be incomplete. The adjuster wrote what they could see on the day they inspected; the crew then found decking damage, a second layer, or a code requirement nobody priced. A supplement documents the difference and asks for it to be added to the claim.
When should a supplement be submitted?
As soon as the gap is documented, and before the work in question is covered up. A supplement submitted after a roof is finished asks a carrier to pay for something nobody can inspect any more, which is the weakest possible position. The strongest supplements are the ones where the photographs still show the condition.
Can a roofing contractor negotiate a claim on the homeowner’s behalf?
What a contractor may do varies by state, and several states draw a hard line between documenting your own scope of work and adjusting or negotiating a claim for a policyholder — the latter typically requiring a public adjuster or attorney licence. Get the rule for the states you work in from your own counsel before your process depends on the answer. Nothing here is legal advice.