A roof supplement is a formal request to add items the initial adjuster scope missed — like decking, ice & water shield, drip edge, or code-required upgrades. Most supplements are documented per Xactimate line item with photographs.
Key facts
- Common supplemented items: decking replacement, ice & water shield, synthetic underlayment upgrade, drip edge, ridge vent, code-required ventilation.
- Xactimate is the estimating software most carriers use; supplements are typically submitted in the same format.
- Texas Building Code may require ventilation, decking, or flashing upgrades that the original estimate omitted.
- Code coverage (Ordinance or Law) is a separate policy provision that funds code-required upgrades.
- Most supplements are approved when properly documented with photos and code references.
Step-by-step
- 1
Identify missed scope
Compare the carrier's estimate against the actual roof condition and code requirements.
- 2
Document each item with photos
Every supplemented item needs visual justification — close-up photos with reference labels.
- 3
Cite the relevant code or manufacturer spec
If the item is required by code or a manufacturer warranty, cite the section directly.
- 4
Submit in Xactimate format
Match the carrier's estimating software. Use the same line item codes for clear comparison.
- 5
Follow up to approval
Supplements often go through multiple rounds. Persistence with proper documentation typically results in approval.
Frequently asked questions
What is a supplement on an insurance claim?+
A supplement is a formal addition to the original estimate covering items the adjuster missed or undervalued.
Do supplements raise red flags with carriers?+
No. Properly documented supplements are an expected part of the claim process. Carriers explicitly allow them.
Who pays for supplemented items?+
Your carrier, subject to coverage and deductible. Supplements do not increase your out-of-pocket cost.
How long do supplements take?+
Typically 7–30 days from submission to approval, depending on the carrier's review queue.