Plywood Flooring Thickness

The thickness of your plywood subfloor depends on the joist spans.

Plywood flooring thickness.

The thickness of plywood panels in a subfloor is regulated by the. A 3 4 sheet is actually 23 32 thick. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance.

The subfloor is the decking installed on top of flooring joists. Plywood flooring thickness is important for proper weight distribution. Plywood comes in a variety of thicknesses beginning at 1 8 inch and increasing to 1 inch. It adds proven performance and durability to new homes room additions and renovations.

The most common plywood uses include support for floors walls roofs and garages in residential construction. The finished floor is then installed on top of the subfloor. It is rot resistant with knots replaced with football shaped plugs to give it a smooth moisture resistant surface. Plywood is the most common type of subflooring.

The plywood must be exterior grade for all wet areas and it has to be installed in such a way that the joints between each layer do not line up using what is known as a stagger pattern to keep the pieces from ever lining up. The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. This type of plywood won t sag when used on a 12 inches joist structure. Some experts suggest that 15 32 inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less but slightly thicker 3 4 inch plywood should be used for joists spaced further apart.

Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. The recommended thickness of the plywood subfloor is governed by the spacing of the joists. The recommended shed floor plywood thickness is 3 4 inch pressure treated exterior grade cdx plywood. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor.

The most common thickness of plywood is 1 2 inch but plywood thickness can range from 1 8 inch to 3 4 inches. Plywood flooring thickness is important for proper weight distribution. What is the actual thickness of a sheet of plywood.