Supplementing Underpaid Scopes: The Contractor Playbook

Every adjuster scope is incomplete. That is not an insult, it is reality. Adjusters write 8 to 15 claims a day and cannot know every code, every manufacturer spec, or every local jurisdiction requirement. Your job as the contractor is to identify the gaps and submit a supplement that brings the scope up to the full cost of a code-compliant repair. This is the supplement playbook.

What adjusters routinely miss

Across 10,000+ supplements analyzed in 2025, here are the line items most frequently missed on initial adjuster scope:

1. Ice and water shield (missed 38 percent of the time)

Code requires it at eaves, valleys, and around penetrations in most northern states. Adjusters often write felt-only scopes even on homes that require I&W by code. $78 to $115 per square supplement.

2. Drip edge at rakes (missed 35 percent)

Drip edge at eaves is usually included. Drip edge at rakes is frequently missed. $4.20 to $6.85 per linear foot. Most 2012+ codes require drip edge at both eaves and rakes.

3. Step flashing R&R (missed 42 percent)

Adjusters often note "re-use existing step flashing" when code and best practice require replacement. Fight with photo of deteriorated flashing condition. $12 to $22 per linear foot.

4. Ridge vent code upgrade (missed 28 percent)

Existing turbine vents or gable vents may not meet current code ventilation requirements. Document square footage of attic and compare to existing vent area to prove code shortfall. $8.20 to $12.40 per linear foot.

5. Pipe boots and flashings (missed 30 percent)

Adjusters often include only the damaged boots, not full replacement. On a re-roof, all boots should be replaced as standard practice. $28 to $55 each.

6. Decking replacement (missed 55 percent)

Adjusters almost never include deck replacement on initial scope because damage is not visible until tear-off. File a supplement after tear-off with photos of bad decking. $85 to $125 per 4 by 8 sheet.

7. Satellite dish R&R (missed 48 percent)

When dish is present, R&R is a real labor item. Push back on "homeowner responsibility" denial. $185 to $285.

8. Chimney flashing R&R (missed 52 percent)

Step and counter flashing around chimneys requires removal and replacement when the roof is replaced. Often written as "re-use" or missed entirely. $285 to $485 per chimney.

9. Gutter apron or kick-out flashing (missed 60 percent)

Kick-out flashing at roof-wall transitions above gutters is code-required since 2009. Often missing on older homes. Supplement line item. $8 to $18 per location.

10. Waste and overage (missed 40 percent)

Standard waste factor on shingles is 10 to 15 percent. On cut-up roofs with many facets, waste can exceed 20 percent. Push for actual waste factor on complex roofs.

Code upgrade line items

If the homeowner's policy has Ordinance or Law coverage, code upgrade items are fully paid beyond the basic restoration. Common code upgrades to include:

• Ice and water shield to current code extent
• Drip edge at eaves and rakes
• Synthetic underlayment where felt was existing
• 6-nail high-wind pattern on roof
• Ridge vent upgrade
• Decking replacement where span tables require upgrade
• Current IRC fastener requirements

Pull the applicable code section and cite it in the supplement. "Per IRC 2018 R905.1.2" is stronger than "per current code" when arguing with adjusters.

The supplement filing sequence

Step 1: Pre-tear-off supplement

File the first supplement after reviewing the initial scope, before tear-off. Target missing line items that are visible from the initial inspection: flashings, ice and water shield, code upgrades, underestimated waste.

Timeline: within 7 days of receiving initial scope.

Step 2: Tear-off supplement

During tear-off, document everything revealed beneath the shingles. File the second supplement with photos of:

• Rotted or damaged decking
• Missing or damaged underlayment
• Deteriorated flashings
• Structural issues revealed

Timeline: during or immediately after tear-off, before re-roofing begins.

Step 3: Completion supplement

After the job is complete, file any final supplement for:

• Items discovered during install
• Additional materials consumed beyond estimate
• Labor surcharges for unforeseen conditions

Timeline: within 14 days of job completion.

Documentation standards

A weak supplement gets denied. A strong supplement includes:

1. Photo evidence of every claimed line item
2. Written narrative describing the condition and why it requires the line item
3. Citation of code, manufacturer spec, or industry standard
4. Xactimate line items with correct description and quantity
5. Comparison to existing scope showing what was missed

Xactimate line item precision

Use exact Xactimate line item codes in your supplement. "Install drip edge" is imprecise. "RFG DE" with sub-code for specific material (aluminum vs galvanized steel) is precise. Precision reduces denial on technicalities.

Common Xactimate codes you should know:

• RFG 240 - 3-tab shingles
• RFG 30YR - 30-year architectural shingles
• RFG IWS - Ice and water shield
• RFG FELT - Felt underlayment
• RFG SYNF - Synthetic underlayment
• RFG DE - Drip edge aluminum
• RFG RVENT - Ridge vent
• RFG STPF - Step flashing

Pushback tactics

When an adjuster denies a line item, your next move depends on the basis of denial.

"Re-use existing" denial

Counter with manufacturer spec requiring new flashing on re-roof, or with photos showing the existing is too deteriorated for re-use.

"Not damaged" denial

Counter with close-up photos, moisture readings, or engineer letter documenting damage not visible in adjuster's photos.

"Not covered" denial

Counter with policy endorsement showing coverage. Ordinance or Law, Additional Coverage, Code Upgrade endorsements.

"Wear and tear" denial

Counter with pre-loss condition photos, maintenance records, and storm data showing the specific date of loss.

When to escalate

If repeated supplements are denied without valid cause, escalate in this sequence:

1. Request a second adjuster for re-inspection
2. Request supervisor or claims manager review
3. File a state Department of Insurance complaint
4. Invoke the appraisal clause (if in policy)
5. Recommend the homeowner retain a public adjuster or attorney

Escalation is a last resort but necessary when documentation is clean and denials are unreasonable.

The RoofKnockers Supplement Tracker

RoofKnockers Supplement Manager tracks every line item you have ever filed, which carrier, approved or denied, and the adjuster name. Over time this builds a predictive model that flags likely denials before you file, so you can pre-load documentation.

It also auto-generates Xactimate-format supplements from inspection photos, so a 30-minute task becomes a 5-minute task.

For more on documentation, see multi-slope roof inspection tactics. For specific damage types, read wind uplift documentation techniques and ice dam damage claims playbook.

FAQ

How long do I have to file a supplement?

Varies by state. Most states allow supplements up to policy cut-off (usually 1 year from loss). File as soon as you identify missed items, not after the project is paid.

Can the homeowner file the supplement instead of me?

Yes but the contractor is usually more effective because we speak the carrier's language. Most contracts include an "assignment of benefits" giving the contractor the right to file.

What if the adjuster writes the check before I file the supplement?

You can still file the supplement. The initial check is partial payment. Supplements add to the total claim amount.