What is sheathing plywood?

Sheathing plywood is a type of plywood that is specifically designed for use as exterior sheathing on buildings. It is typically made from softwood veneers that are glued together with exterior grade adhesives. Sheathing plywood is typically graded for quality based on the number of defects in the veneer layers and the overall strength of the panel.

Sheathing plywood is commonly used as a structural panel for walls, roofs, and floors in residential and commercial construction. It is often used as a base for siding, roofing materials, and insulation. Sheathing plywood is usually designed to be water-resistant and can withstand exposure to moisture, making it suitable for exterior use.

Common thicknesses of sheathing plywood include 1/2 inch, 5/8 inch, and 3/4 inch, with 4x8 sheets being the most common size. It is important to use the correct type and thickness of sheathing plywood for the specific application to ensure structural integrity and performance. Additionally, sheathing plywood should be installed according to building codes and manufacturer guidelines to ensure proper installation and long-term durability.