Home Inspection Flashcard #159

Roof, Asphalt Shingle

What's Your Call?

What is the most likely cause of the shingle buckling shown here?

a. Shingles installed using the racking method on the wrong types of shingles.

b. Thermal expansion of roof sheathing.

c. Poorly installed underlayment.

d. Roof sheathing expansion due to moisture absorption.

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