What is the purpose of exterior sheathing in residential construction?

The purpose of exterior sheathing in residential construction primarily includes serving as a moisture barrier and providing structural support. By acting as a moisture barrier, sheathing helps protect the wooden framing of the house from water infiltration, which can lead to structural damage and mold growth over time. This moisture resistance is critical for maintaining the integrity of the building.

In addition to its moisture-protective qualities, exterior sheathing adds to the structural stability of the wall assembly. It helps to distribute loads and can add rigidity to the walls, assisting in resisting lateral forces such as wind pressure. This structural support is essential for ensuring that the overall framework is sound and that the building adheres to safety standards.

While insulation, soundproofing, aesthetic enhancement, and pest prevention are important aspects of residential construction, they are not the primary functions of exterior sheathing. Insulation typically involves separate materials designed specifically for that purpose, while aesthetics and pest barriers are managed through other means in the construction process.