SC Wood Frame Structures Practice Questions - South Carolina Wood Frame Structures Contractor Examination Exam

A wood-frame roof is 3:12. What underlayment application does IBC 1507.2 require beneath asphalt shingles?

No underlayment is required below 4:12 Only ice barrier at the ridge A single layer lapped 2 inches, the same as a 6:12 roof Double underlayment (two layers), because the slope is from 2:12 up to 4:12

Correct Answer:

Double underlayment (two layers), because the slope is from 2:12 up to 4:12

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