What is the primary purpose of sheathing installed on a wall?

The primary purpose of sheathing installed on a wall is to add strength to the structure. Sheathing, typically made from materials like plywood or oriented strand board (OSB), provides rigidity to the walls, which is essential for maintaining the structural integrity of a building. It helps resist lateral forces caused by wind, earthquakes, or other loads, ensuring that the walls remain stable and aligned.

While sheathing can contribute to other functions, such as providing a surface for insulation or protection against moisture and pests, its fundamental role is to enhance the overall strength of the wall system. This strength is critical for supporting the framing and roofing components and ensuring that the home can withstand various stresses over time.