Asphalt shingle batch problems (poll)

(Kenton Shepard, CMI) #1

Without looking up the answer, do you know what asphalt shingle batch problems are and how to identify them?

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(Roy Lewis, CMI - North Florida Inspector) #2

I have taken your shingle courses.
1) installing shingles from different batches on the same roof.

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(Bradley K. Toye, CMI) #3

I call them lot numbers, but I guess it's the same thing. Sometimes very prominent on roofs. You can definitely tell if the install was stepped or racked from the street.:shock:

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