Thickness Of Plywood For Subfloor

There are many types sizes and configurations of plywood.

Thickness of plywood for subfloor.

A subfloor is a wooden structural substrate to which durable finished flooring is attached. When installing a plywood subfloor on top of the slab at grade. Plywood comes in a variety of thicknesses beginning at 1 8 inch and increasing to 1 inch. The thickness of plywood panels in a subfloor is regulated by the spacing of the joists.

For joist spacing of more than 16 inches up to 19 2 inches on center the minimum thickness for both plywood and osb is 3 4 inch. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. Plywood is usually used as subfloor today. Plywood is the most common type of subflooring.

Different plywoods use various materials and methods of manufacture depending on the application for which they re intended. Is there a code or minimual thickness for subfloors. For joists spaced more than 19 2 inches on center the minimum thickness for plywood is 7 8 inch and for osb 1 inch. Typically made of plywood or osb and ranging in thickness from 19 32 to 1 1 8 thick the subfloor is truly structural second only to joists in this respect.

Subfloor holds up all of the above layers of flooring as well as everything in your house people dogs cats pianos furniture. This number is known as a span rating. Floor joists 16 on center.