What does the term "structural sheathing" refer to in residential construction?

Structural sheathing is a crucial component in residential construction, as it refers to boards or panels that provide lateral bracing for the building structure. This sheathing helps to distribute loads and resist lateral forces, such as those from wind or seismic activity. By providing stability, structural sheathing contributes to the overall strength and durability of the structure.

The primary role of structural sheathing is to ensure that the walls can adequately support the structural integrity of the building. Materials commonly used for structural sheathing include oriented strand board (OSB) and plywood, which are designed to enhance the rigidity of the walls.

Other choices do not accurately reflect the purpose of structural sheathing. For instance, insulation is used to improve thermal performance rather than providing structural support. Finishing materials serve aesthetic purposes and are applied after the structural elements are in place. Roofing materials primarily protect the building from weather elements but do not provide lateral bracing to walls. Thus, the definition clearly aligns with the correct choice, emphasizing the critical role of structural sheathing in maintaining the stability and safety of residential buildings.