Read the Date Code on the Bundle Before the Crew Opens It

The bundles on your driveway have wrappers, and the wrappers carry more information than most homeowners read. Atlas and Malarkey shingles are labeled with the product name, the color, and manufacturing details that show where and roughly when the bundle was made. Before the first course goes on, it is worth ten minutes with the bundles on the ground to read what is printed, to compare it with your order, and to know what to ask if the details do not line up with what your contract says.

What the wrapper is telling you

Each bundle is wrapped with a label that names the product line, the color, and a production code. The code is printed in a format set by the manufacturer, and the format is not something a homeowner needs to memorize. What matters is that every bundle on your roof should show the same product line and the same color, and that the production information should be consistent from one bundle to the next. If the color name on your contract is one thing and the wrapper says another, stop there and sort it out before anything goes up.

The production code is the part people skip. It tells you which plant made the shingle and roughly when, which is the information you need to judge how long the bundle sat before it reached your house. A bundle made a few months ago and stored in a warehouse is a different object from one that has been sitting in a supplier's yard through a hot summer. Ask the crew to show you the code on each bundle, not just on the top one of the stack, because a pallet can be made of more than one production run.

Why the date matters on a St. Louis roof

Asphalt shingles are sensitive to heat while they are stored. A bundle that spends weeks in direct July sun on a driveway can soften, and the sealant strip on the back of each shingle can pick up dust, grit, or the impression of the shingle beneath it. The sealant strip is what bonds the shingles to each other after the roof has been warmed by the sun, and a strip that has been damaged in storage does not seal the way the manufacturer intended. That is why the crew should stack bundles flat, keep them out of standing water, and avoid leaving them open to the weather. The sealant point is covered in more detail elsewhere on this site, but the storage point belongs here, because it is the reason the date code matters at all.

St. Louis adds two storage problems that do not exist in every market. In summer, the heat builds fast on a driveway, and a closed truck bed can get hotter than the air. In winter, bundles that have been sitting in cold weather can be stiff, and stiff shingles crack when they are handled roughly. Neither problem is an emergency, and a crew that stores bundles well will not have trouble with either one. The point is that a bundle's age and the conditions it has seen are part of the material you are paying for, and the code is the only record you have of that history.

Matching the lot across the whole roof

Shingles from different production runs can differ in color, even when the label says the same thing. The difference is often small, and it can be hard to see in a bundle on the ground. It becomes visible when the shingles are laid across a roof slope, in a band that runs from the eave to the ridge, and it is most noticeable on a slope that catches the morning light. A roof built from two lots can show a line where one lot ends and the next begins. For that reason, the crew should try to draw every bundle for your roof from the same production run.

You do not need to become an expert in color variation to ask for this. You only need to ask the crew to confirm, in writing, that the bundles on your order come from one code range, and to tell you how many bundles of each code they expect to use. If the supplier cannot fill the order from a single lot, ask how the crew will mix the lots, which slope they will be laid on, and whether the lots will be spread across the roof or kept in clean sections. A straight answer to those three questions is more useful than a brochure on the color range.

What to check on delivery

1. Count the bundles against the order and write the count on the delivery slip before the driver leaves.
2. Read the product name and color on several bundles, including bundles from the middle and bottom of the stack.
3. Note the production code on each bundle and compare the range across the pile.
4. Look for crushed corners, torn wrappers, or bundles that feel soft or warm to the touch.
5. Photograph the labels and the stack before the crew moves anything, so you have a record of what arrived.

Do this with the crew present if you can, or ask for the photos afterward. A bundle that arrives with a torn wrapper is not automatically a bad bundle, but it is a bundle whose history you can no longer see, and that is a reason to ask questions before it goes up.

What to ask before the work starts

• Which product line and color are on the order, and does the wrapper match both?
• What production code range will the bundles on my roof come from?
• How many bundles are on the order, and how many are spare?
• Where will the bundles be stored until they are installed, and how are they kept out of direct sun?
• If a bundle arrives with a code outside the range we agreed on, who is told, and before what step?
• Will you give me the photos of the labels and the stack in writing?

The answers should be specific. A crew that knows its materials can name the product line, show the code, and explain the storage plan without a pause. If the answers are vague, that is a sign to ask the same questions again before the first bundle is opened.

When the codes do not match your order

If a bundle does not match the order, the crew should stop, hold the affected bundles, and call the office before any shingle goes on the roof. Keys Roofing can be reached at (314) 220-2333. Swapping a shingle line for a different one without telling you, or quietly mixing a different lot into the roof, is the kind of change that should be written down and agreed to before the work continues. The contract should say who makes that call and how you will be told.

Keep the wrapper photographs with your copy of the scope. If a question about the material comes up later, whether during the job or after it, those photographs and the written count are the simplest record you will have of what was delivered and when.