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

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Under IBC Section 1907.1, what vapor retarder is required between an interior concrete floor slab and the base course or subgrade (unless an exception applies)?

A 6-mil polyethylene vapor retarder with joints lapped not less than 6 inches, or another approved equivalent No vapor retarder is required under any interior slab Building paper (asphalt felt) lapped 2 inches A coat of curing compound on top of the slab in place of an under-slab retarder

Correct Answer:

A 6-mil polyethylene vapor retarder with joints lapped not less than 6 inches, or another approved equivalent

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