Sheathing

Definition

Sheathing is the rough covering applied to the outside of the roof, wall, or floor framing of a structure. In clay tile or wood shingle/shake roofs, it generally consists of narrow boards laid with a space between them according to the length of a shingle or tile exposed to weather.

Purpose

The purpose of sheathing is to provide a structural surface to which roofing, siding, or flooring materials can be attached, enhancing stability and weather resistance.

Examples of Use

• In residential construction, plywood or OSB sheathing is used on exterior walls to provide a solid base for siding.
• Roof sheathing supports roofing materials like shingles or tiles and helps distribute loads.
• Floor sheathing provides a stable base for finished flooring materials in homes and commercial buildings.

Related Terms

• Substrate: The underlying surface to which sheathing is applied.
• Plywood: A type of engineered wood used for sheathing.
• OSB (Oriented Strand Board): An engineered wood similar to plywood, used for sheathing and subflooring.

Notes

Proper installation of sheathing is critical for the structural integrity and weather resistance of buildings, providing a base for various finishes and coverings.