What is the primary purpose of house wrap in construction?

The primary purpose of house wrap in construction is to act as a moisture barrier. House wrap is a versatile material that is installed on the exterior of a building's sheathing. Its main function is to prevent water from penetrating the wall system while allowing water vapor to escape. This is crucial in preventing moisture-related issues such as mold growth, wood rot, and damage to insulation. By keeping moisture out while allowing any trapped moisture to evaporate, house wrap contributes significantly to the longevity and durability of the building envelope.

Insulation, while important for energy efficiency, is not the primary function of house wrap; instead, insulation is typically installed within the wall cavities. The aesthetic appearance of a structure is influenced by siding and other finishing materials rather than house wrap, which is generally not visible once the final exterior is installed. Reinforcing structural integrity pertains more to the building framework and materials rather than to house wrap itself, which serves a different purpose in managing moisture control.