Foundations are susceptible to moisture wicking into the building through capillary action from footings and foundation walls or through slabs. This can be controlled through the installation of a capillary break between the top of the footing and the foundation wall or piers, and a ____ barrier below the concrete slab floor or over the dirt floor of the crawl space.
A. vapor
B. moisture
C. silicon
D. wooden
Answer: A
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