Sheathing
Definition and meaning of Sheathing in real estate.
Sheathing is a layer of boards or panels applied to the outer framing of a house to reinforce the structure and provide a flat surface for finishes. It is typically installed on exterior walls, roofs, and floors to bind the studs, rafters, or joists together.
In more detail
In residential construction, sheathing serves as a structural skin that resists twisting and bending forces, which is especially important in areas prone to high winds or earthquakes. Oriented strand board (OSB) and plywood are the most common materials used for sheathing today. In addition to adding structural strength, exterior wall sheathing acts as a base for securing siding and house wrap, while roof sheathing supports the underlayment and shingles.
Builders must install sheathing with small gaps between panels to allow for expansion and contraction during weather changes.
Key facts
| Category | Property Types & Construction |
|---|---|
| Common Materials | Oriented strand board (OSB), plywood |
| Primary Function | Structural reinforcement and siding support |
| Required by | Most local building codes |
A homebuilder installs panels of oriented strand board over the exterior wall studs of a new house before wrapping the building in a moisture barrier and attaching vinyl siding.
Frequently asked questions
What is the difference between OSB and plywood sheathing?
Oriented strand board (OSB) is made from compressed wood strands and is typically less expensive, whereas plywood is made from glued wood veneers and offers slightly better moisture resistance.
Is wall sheathing required by building codes?
Yes, local building codes in most jurisdictions require sheathing on exterior walls to ensure structural stability and wind resistance.