When a shingle or siding product is damaged on only part of a roof or elevation, one of the first technical questions in a claim is exactly what product is already installed. Product identification reports exist to answer that question with more certainty than a visual guess from the ground.
These reports are typically prepared by an independent laboratory or a qualified field examiner who documents physical characteristics of a sample, such as dimensions, color blend, and granule type on a shingle, or profile and texture on vinyl or other siding, and compares those characteristics against manufacturer specifications and product libraries. The result is usually an identification of the manufacturer and product line, and in many cases an approximate window of when the product was made.
That information feeds directly into two practical questions in a claim: can the damaged sections be matched with new material, and is that product still available. Asphalt shingle color blends and siding profiles change over time, and manufacturers regularly discontinue product lines or shift color offerings. A product identification report confirming that a shingle or siding line was discontinued years earlier is often what moves a scope discussion from a partial repair toward broader replacement of a slope, elevation, or in some cases an entire roof or wall.
Product identification also matters when a dispute involves possible pre existing conditions rather than storm damage. Knowing the specific product and approximate age can connect a claim to known manufacturing characteristics of that product line, supporting a more precise, evidence based opinion about what is actually causing a condition observed at the property. This is particularly useful on older homes in the Midwest, where multiple layers of siding or more than one generation of shingles may be present on the same structure, and where a report can help sort out which materials belong to which installation.
For an appraisal panel, a product identification report functions as neutral technical documentation rather than an argument for either party. Appraisers and umpires use it the same way they use code documents or manufacturer installation instructions, as a reference point that helps establish facts about the property, matching availability, and product characteristics that inform the scope of repair. The report does not decide coverage questions, and it does not replace a physical inspection of the damage itself, but it narrows the factual uncertainty around matching and availability that often sits underneath a broader scope disagreement.
Because siding and shingle products can look similar across manufacturers at a glance, especially from the ground or in photographs, a formal identification report is frequently the most efficient way to resolve a factual dispute over whether a proposed replacement product is a reasonable match, rather than leaving the question to opinion.
This article is general education about how the appraisal process commonly works. It is not legal advice, and specific procedures can vary by state and policy.
Russ Lis is a working property insurance appraiser and umpire based in Minnesota, serving clients nationwide. His construction background supports an independent, evidence based opinion on scope and value in property insurance disputes. Contact Appraisal Resolution.