What is the purpose of a capillary break in a building enclosure assembly?
Correct Answer
A) To interrupt moisture wicking through small paths
A capillary break interrupts liquid-water wicking through pores or narrow contact paths. It can use an appropriate separating material or an air gap large enough to interrupt that path. It does not by itself establish structural capacity, fire resistance or complete control of vapor and bulk water. Source: https://basc.pnnl.gov/information/building-science-introduction-moisture-flow
Why This Is the Correct Answer
A capillary break interrupts liquid-water wicking through pores or narrow contact paths. It can use an appropriate separating material or an air gap large enough to interrupt that path. It does not by itself establish structural capacity, fire resistance or complete control of vapor and bulk water. Source: https://basc.pnnl.gov/information/building-science-introduction-moisture-flow
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