How to Write a Roofing Supplement Letter
```htmlHow to Write a Roofing Supplement Letter
A roofing supplement letter needs to clearly state what the adjuster missed, include photo evidence, and reference specific line items from the original estimate. Your goal is to document legitimate additional damage or scope items the insurance company didn't initially approve, with supporting evidence that makes it hard to deny.
Start with the Basics: Header and Reference Info
Put your company letterhead at the top. Include the claim number, policy number, insured's name, and property address in the first few lines. Reference the original estimate date and adjuster's name.
This sounds simple but I've seen contractors lose $2,400 supplements because they forgot to include the claim number. Adjusters handle 50+ files. Make their job easy.
Add a clear subject line: "Supplemental Request - [Address] - Claim #[Number]". Direct. Professional. Gets opened first.
Document What Was Missed
List each additional item in a numbered format. For each one, explain:
- What the item is (drip edge, valley metal, decking)
- Why it wasn't on the original estimate
- Why it's necessary (code requirement, hidden damage, safety)
- How much it costs (reference Xactimate line items)
Example: "Item 3: Additional roof decking replacement - 12 sheets. During tear-off, we discovered water damage to decking not visible from exterior inspection. See attached photos from 3/15/25. This is a safety issue and required by code before new shingles can be installed."
Most contractors using tools like JobNimbus ($619+/mo) or AccuLynx ($250+/mo) still write these letters manually. In Roofing OS, we built templates that auto-populate your claim data and link directly to your photo documentation. Saves about 20 minutes per supplement.
Check out our roofing supplement checklist for Xactimate for the most commonly missed line items.
Include Photo Evidence
Photos win supplements. Period.
Take clear, dated photos of every additional item. Close-ups and wide shots. Show the damage, the location, and context. Label each photo in your letter.
Reference specific photos: "See Photo A attached - shows exposed, water-damaged decking in northwest corner." Don't make the adjuster hunt for what you're talking about.
If you're using CompanyCam ($99/mo), you already have decent photo organization. The key is connecting those photos to specific supplement line items. We built this workflow directly into Roofing OS so your field crew can tag photos to claim items in real-time.
For more on tracking the full claim process, read how to track roofing insurance claims.
Close with Clear Next Steps
End your letter with a specific request: "Please approve the attached supplemental estimate totaling $3,200 for the additional scope items documented above."
Include your contact info. Phone and email. Tell them when you'll follow up if you don't hear back (usually 3-5 business days).
Keep the tone professional but firm. You're not asking for a favor. You're documenting legitimate work that needs to be done.
Attach your revised estimate, all photos, and any relevant code references. Make it a complete package.
One letter. One email. Everything they need to approve it.
Frequently Asked Questions
How long should a roofing supplement letter be?
Keep it to one page if possible, two pages max. Adjusters are busy. A concise letter with clear line items and good photos gets approved faster than a three-page essay. Focus on facts, not storytelling.
Should I send the supplement letter before or after completing the work?
Send it as soon as you discover the additional items during tear-off or inspection. Don't wait until the job is done. You want approval before you front the costs. Take photos immediately, write the letter that day, and send it within 24 hours.
What's the average approval rate for roofing supplements?
Well-documented supplements with photos typically get approved 70-80% of the time. Supplements without photos or vague descriptions? Maybe 30%. The difference is in your documentation quality. If you show clear evidence of damage or code requirements, adjusters usually approve it.
Can I use the same supplement letter template for every claim?
Yes, use a standard template for your header and format, but customize the specific items for each claim. Every roof is different. Copy-pasting the same scope items across multiple claims will get you flagged. Templates save time on structure, not on content.
Want to stop writing these letters from scratch every time? Try Roofing OS free — takes 4 minutes. roofingos.dev
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