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What thickness plywood do you use for flooring?

By Isabella Wilson

What thickness plywood do you use for flooring?

The recommended thickness of the plywood subfloor is governed by the spacing of the joists. 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.

Is 18mm plywood suitable for flooring?

structural 18 mm ply is fine ,you may have to add some timber noggins to offer further support at edges where butting up to chipboard on joists and adjoining edges .

What thickness subfloor is recommended?

The minimum thickness of plywood for subflooring is about 5/8 inch. Since it does not hold fasteners as well as plywood, OSB must be a little thicker, or at least 23/32 inch. There are several factors that determine what subfloor thickness is optimal for added benefits like insulation.

Is 18mm thick enough for flooring?

With the thickness of the floor being at least 18mm, you can be sure it is stable enough to go over joists. Fitting over joists can add extra pressure to your hardwood floor, but structural wood has the correct load bearing properties to cope with this.

Is plywood OK for flooring?

Interior plywood is ideal for rooms not exposed to moisture, such as bedrooms, and makes a good subfloor for carpeting, tiles, vinyl, engineered wood laminate flooring and hardwood flooring. Marine plywood is the strongest and most water-resistant type of plywood, making it a good choice for bathrooms and basements.

What’s the minimum thickness of plywood to use on a floor?

The minimum thickness allowed for ceramic tile installations is two sheets of 5/8-inch thick plywood. 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.

What kind of plywood do you use for a subfloor?

Joists are what supports the floor. They’re typically 2×8, 2×10, 2×12 or engineered lumber and 16 inches on center. A plywood subfloor is glued and screwed directly to the joists. This is usually OSB, CDX or regular plywood.

How big should the joist be for plywood flooring?

Joist span is very important when calculating the thickness of a plywood floor. Typically, new floor joists are spaced at 16″ on center. However many older homes used 24″ o.c.

What kind of plywood do I need for carpet?

As such, a single sheet of 3/4-inch material is all that is required for carpet installations as long as the joists are the same distance apart as for hardwood floors. Joists farther apart will require an additional sheet of plywood to add more support.

What is the thickest plywood I can buy?

The thickest sheets of plywood are typically 3/4 inch. Fiberglass, on the other hand, is 3/4 inch thick at its thinnest, and is available in widths of up to 1 1/2 inches.

What size plywood do I use for a subfloor?

The thickness of your plywood subfloor depends on the joist spans. The National Wood Flooring Association recommends a minimum plywood panel thickness of 7/8-inch for joist spans of 19.2 to 24 inches, and a minimum plywood panel thickness of 5/8-inch for joist spans of 16 inches or less.

What type of plywood to use for a subfloor?

Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring.

How do you use plywood for flooring?

There are two ways of applying plywood flooring, either as a sub-floor for other finishes and as a visible, working surface. Sub-floors are typically applied in full sheet form on joists secured with screws or nails. The sheets are then clad with carpeting, cork, vinyl, or ceramic tile.