Question: How Many Layers Of Plywood Do You Need For A Subfloor?

How do you fasten underlayment for plywood?

When installed with staples, the underlayment sheets are fastened every 2 inches along the edges of the sheet and every 4 inches in the field area.

Screws and nails may be spaced farther apart.

Sheets can be butted together (just touching, not forced tightly together) or they can be gapped about 1/8 inch, or so..

What is the difference between subfloor and underlayment?

Underlayment is the third layer, residing just above the subfloor. While a subfloor provides structural support, the underlayment serves as a sound barrier and can protect your flooring from moisture and heat. … Underlayment can help protect laminate from moisture that may rise from below.

What type of plywood is used for bathroom subfloor?

CDX plywoodTraditionally, 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.

What kind of plywood do you use for subfloor?

Oriented Strand Board OSB can be used for subfloors, although it is not as common as CDX. For 19/32-inch-thick panels, the joists should be 20 inches on center. For 23/32-inch-thick panels, the joists should be at least 24 inches on center.

Is it better to nail or screw subfloor?

When you use a nail gun to attach subfloor sheathing to the floor joists, the nail sometimes misses the joist. … Remember, nails can pull up; screws don’t. This gives us stronger floors that will not move or squeak.

Can I put plywood over subfloor?

Plywood is made up of several layers of wood veneer glued together with adjacent layers that form a composite substance. … Mobile home subfloor thickness may be of some concern, and installing plywood over this subfloor can give you a stronger base for your hardwood, laminate or carpeting.

Is Advantech better than plywood?

Advantech is 62 percent stronger than typical plywood when it comes to bending power.

What thickness is 23 32 plywood?

Plywood is often sold in 1/4“, 1/2“, or 3/4” nominal thicknesses, but the actual thickness is often 1/32” thinner. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. A 3/4” sheet is actually 23/32” thick. A 1/2” sheet is actually 15/32” thick.

What is better for subfloor OSB or plywood?

The National Tile Contractors Association and the Resilient Floor Covering Institute both recommend plywood for subflooring and underlayment, because it doesn’t have the risk of swollen edges that OSB does. Plywood also has a slight advantage in stiffness, which means that subflooring panels need not be quite as thick.

How thick should Plywood be 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.

Do I need 2 layers of subfloor?

The end joints must fall on a joist. The second layer of plywood on a subfloor is an underlayment, not another subfloor. If you do replace your subfloor with 3/4″ T&G CDX, you won’t need an underlayment and you can maintain a nominal elevation of flooring throughout.