The Repair vs. Replace Calculator
Insurance adjusters are trained to write “repair” estimates to save the carrier money. Use the math below to prove when a patch is structurally and legally impossible.
The biggest scam in the insurance industry isn’t the outright denial; it is the “Patch Job.” An adjuster will look at a 15-year-old roof with severe wind damage and offer you $800 to replace exactly 12 shingles. Here is why you must reject that check immediately.
To remove one damaged shingle, a roofer must lift the shingle directly above it to remove the nails. On an older roof, lifting that top shingle breaks its sealant bond and tears the fiberglass mat. You fix one shingle, but you break two more. A “repair” actually destroys the roof.
1. The “Brittle Test” (The Physical Proof)
If your roof is older than 10 years, the asphalt has lost essential oils due to UV exposure. It is baked stiff. You must force the adjuster to perform a Repairability Test (often called a Brittle Test).
The Protocol: The roofer or adjuster must lift an undamaged shingle to a 45-degree angle (the minimum height required to swing a hammer to drive a nail). If the shingle creases, cracks, or fails to reseal, the roof has failed the brittle test. It cannot be patched.
“Before we accept the repair estimate of $800, we require a documented Brittle Test to confirm repairability. Please schedule a time to meet our contractor on-site. If lifting the surrounding shingles causes creasing or material failure, we will require a revised estimate for a full slope/roof replacement based on the inability to effectuate a repair.”
2. The 25% Rule (The Legal Proof)
Even if the shingles are brand new and flexible, local building codes protect you from having a “checkerboard” roof of patches. Many jurisdictions have adopted the International Building Code (IBC) or similar local ordinances.
A common building code explicitly states: “Not more than 25 percent of the total roof area or roof section of any existing building or structure shall be repaired, replaced or recovered in any 12-month period unless the entire existing roofing system or roof section is replaced.”
If the storm damaged 30% of your roof, it is illegal to patch it. The insurance company must pay for a total replacement under your Ordinance or Law coverage.
3. The “Line of Sight” Matching Law
What if your roof is only 5 years old, highly repairable, and only has 5% damage? The carrier might still owe you a new roof if your specific shingle model or color was discontinued.
Certain states (like Ohio, Kentucky, and Florida) have strict matching laws. If the contractor cannot find a patch that is a “reasonably uniform appearance” to the existing roof, the carrier cannot leave you with an ugly, patchwork house. They must replace the slopes in the “line of sight” to ensure uniform curb appeal.
Conclusion
Do not let an adjuster do visual math from the ground. Use our calculator to check the percentages, demand a brittle test, and cite the building code. If they still refuse, it is time to escalate to the Appraisal Clause.