A vapor retarder is required under
A)all interior concrete slabs- on- ground.
B)all exterior concrete slabs- on- ground.
C)all concrete slabs- on- ground.
D)some interior concrete slabs- on- ground.

Question

Quizplus · Accepted Answer

A vapor retarder is only required under some interior concrete slabs-on-ground, depending on the climate and moisture conditions of the area. In areas with high humidity or moisture, a vapor retarder can prevent moisture from getting into the concrete slab and causing issues such as mold growth or deterioration. However, in arid climates or in areas with well-draining soils, vapor retarders may not be necessary. Exterior concrete slabs-on-ground typically do not require a vapor retarder because they are exposed to the outside air and any moisture that enters can easily evaporate.

A Vapor Retarder Is Required Under