Where is sheathing placed on a building?

• A. Over exterior wall studs or roof rafters
• B. Inside interior walls only
• C. Under the foundation
• D. On interior ceilings

Answer: (A)

Sheathing is the exterior layer fastened to the building’s framing, giving structural rigidity and a surface to attach siding and roofing. It is placed over exterior wall studs and roof rafters, forming the outer skin of the structure. This layer also provides a backing for weather barriers and insulation. It isn’t used inside interior walls, under the foundation, or on interior ceilings, which are finished with other materials.