What are date codes on roofing bundles?

• A. The warranty period for the shingles.
• B. The color code for the shingles.
• C. The lot number printed on individual shingles.
• D. Date of manufacture printed on bundles.

Answer: (D)

Date codes show when the bundle of shingles was manufactured. This tells you how fresh the material is and helps with stock control, warranty eligibility (many warranties require installation within a certain window from production), and assessing how long the shingles may have been exposed to storage conditions. They’re not the warranty period itself, not a color code, and not simply a lot number printed on each shingle. The date code on the bundle specifically marks the production date of that batch, which is the key point for planning installs and managing material quality.