Plywood Thickness Subfloor Carpet

This number is known as a span rating.

Plywood thickness subfloor carpet.

Cdx plywood ranging from 1 2 to 3 4 inch thick and rated a c will serve well for any hardwood flooring installation. When installing a plywood subfloor on top of the slab at grade the. For hardwood finish flooring which average about 3 8 inch to 3 4 inch in thickness 1 2 inch to 3 4 inch thick plywood is the preferred subfloor though there are a variety of grades designed for. Make sure it is screwed and fixed at appropriate points usually a minimum 300mm centres.

Wood and carpet can be installed directly on the subfloor. The subfloor thickness depends on the construction design namely the distance between the floor joists specified in the plans. Plywood is less affected by rain during construction and holds nails and screws better than osb but osb is usually less expensive. Tongue and groove plywood is available to reduce squeaks and help the subfloor fit together better.

It typically comes in 4 x 8 foot sheets. To secure the panels a special subfloor adhesive will be added to the floor joists and each panel will also be nailed down anywhere it touches a floor joist. Once all the subfloor panels are secured your contractor can begin the process of installing the carpet. Most plywood underlayment is about 1 4 inch thick and has square edges and a smooth knot free top face.

For many years the standard option was lauan plywood also called philippine mahogany or luan plywood which is made with an inexpensive tropical hardwood and therein lies its problem. The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. Interestingly the supply of plywood into the uk is extremely inconsistent at present and probably over the last few years. 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 thickness of plywood panels in a subfloor is regulated by the spacing of the joists.