AL Insulation Practice Questions - Alabama Insulation Contractor Examination Exam

Alabama is generally in a mixed-humid climate. For wall assemblies, this typically means vapor control design should:

Ignore moisture because humidity is always low Account for both winter inward-to-outward and summer outdoor-to-indoor vapor drives Always use two Class I vapor barriers, one on each side of the wall Prohibit any vapor-open exterior sheathing

Correct Answer:

Account for both winter inward-to-outward and summer outdoor-to-indoor vapor drives

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