What is the function of sheathing in wall construction?

Sheathing plays a crucial role in wall construction by creating a structural connection between the studs. It is typically made from materials like plywood or oriented strand board (OSB) and is attached to the exterior side of the wall studs. This connection enhances the overall stability of the wall assembly, helping to distribute loads and resist lateral forces such as wind. By securing the studs together, sheathing adds rigidity to the wall frame, reducing the likelihood of buckling or warping.

While sheathing does contribute to moisture resistance and can assist with insulation, its primary purpose is not insulation or serving as the exterior finish. Additionally, although it helps in preventing some water infiltration, that is not its main function; rather, other materials like house wrap or weather barriers are typically employed for effective moisture management. Thus, the most accurate description of sheathing's role in wall construction is its ability to provide structural integrity by connecting the studs.