How thick should floor plywood be?

the subfloors need to be thicker. 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. For joists spaced more than 19.2 inches on center, the minimum thickness for plywood is 7/8 inch and for OSB, 1 inch.

Thickness of Plywood 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.

Also Know, what type of plywood is used for flooring? While OSB is the most popular structural panel, CDX plywood is the most popular type of traditional or “veneer” plywood. CDX plywood is like other laminate plywoods, but the outer layers of laminate are grades “C” and “D,” which means they are cosmetically rough and contain many imperfections, thus lowering their cost.

In this regard, how thick should a floor be?

In a typical home, the entire structure between levels can be about 12 to 14 inches thick, depending on the type of joists used and the finish materials for the floor and ceiling.

How thick should subfloor be for hardwood floors?

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 specific applications. Using tongue-and-groove plywood can reduce squeaks, as the sheets will seat together better.

How thick should Plywood be to walk on?

No matter what the spacing is on your ceiling joists, 3/4-inch plywood should be used if you plan on walking on it. If you plan on placing the plywood around the perimeter of the opening or door and using it only to store light boxes or materials, 1/2-inch-thick plywood should suffice.

Do I need to glue plywood to subfloor?

On the 3/4″ subfloor, you have the right idea. Use subfloor adhesive, and screw 8″ at edges, 12″ in field. For the 1/2″ underlayment, ideally, you want to screw every 6″ all across the panel. Adhesive will help you here, as the subfloor plywood will have voids in spots that will not hold a fastener.

How many layers of plywood do you need for a subfloor?

Floating subfloor: There are two common methods for this. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top.

Do plywood floors hold up?

Durable for Any Environment Because it is engineered with many layers, plywood flooring is strong, stable and durable.

How much does plywood flooring cost?

Plywood Subfloor Cost Plywood costs around $22 per 4′ x 8′ panel. That equates to around $1.50 per square foot for a 5/8″ panel. For a 306-square-foot room, that’s a total of $459.

What is the best material for 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 thick should a subfloor be?

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. All houses have subfloors.

Can floor joists be 24 inches on center?

Proper Spacing. As with the joist size, the building code for your structure will stipulate the proper spacing between floor joists. Given that 2x8s are actually 1-¾ inches wide, it works out to be 14-¼ inches between each joist. With some structures, floor joists are required to be 12 or 24 inches apart on center.

Can I put new subfloor over old subfloor?

One of the benefits of removing the old flooring is it allows you the chance to fix any loose subflooring or squeaks by re-securing the main subfloor to the floor joists prior to installing the new flooring. With all that being said though the answer is YES you can install New Wood Flooring over the old.

Do you have to use tongue and groove for subfloor?

For subflooring, you use tongue and groove plywood. The tongue and groove are only along the 8 foot edges. On the four foot edges, your seams will fall on joist tops, so no need for tongue and groove.

What is the space between two floors called?

An interstitial space is an intermediate space located between regular-use floors, commonly located in hospitals and laboratory-type buildings to allow space for the mechanical systems of the building.

What is the best subfloor for a bathroom?

Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Plywood is made by gluing alternating layers of wood veneer. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity.