Question: What Kind Of Plywood For Subfloor?

What size plywood is best for subfloor?

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 plywood or OSB better for a subfloor?

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.

What is best material for subfloor?

Plywood. Plywood is considered the most popular material used for subflooring, it has been used since the 1950s and remains one of the top choices for contractors. Standard plywood works perfectly fine as a subflooring material, but the best option is ¾” tongue-and-groove plywood subflooring.

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What size screws 3/4 plywood subfloor?

The 3/4-inch-thick subfloor takes a 2-inch screw. A thicker subfloor takes a 3-inch screw. Use a heavy-duty drill to drive Phillips head wood screws through the subfloor into the floor joists. Drive the screws approximately 8 inches apart.

Is it OK to use OSB for subfloor?

Most local codes allow OSB to be used for subflooring. It’s always best to check with your local permitting office before using OSB for your subfloor. One advantage that OSB has over plywood is its larger formatting. For plywood, 8-foot and 10-foot long sheets of plywood are standard.

Should you lay plywood over plank subfloor?

Take time to make sure your existing planks are well secured in place. Repair any broken planks. Install a layer of at least ½” or preferably 5/8” ply over the existing planks. Like all wooden flooring products, it’s a good idea to acclimatise your plywood before laying it.

Is it OK to use treated plywood for subfloor?

Under the IRC this 19% or less moisture content lumber is called kiln-dried-after-treatment lumber and is perfectly acceptable to be used in structural sheathing, subflooring, or framing.

Can you use MDF as subfloor?

Since MDF is a hard underlay with a smooth finish, you can place it underneath vinyl, LVT tiles, or carpet. It’s not uncommon to see treated MDF used as a flooring surface. You could also use MDF as an underlay for a floating wood floor, but you’ll want a foam or rubber membrane for extra softening.

Do you have to use tongue and groove plywood 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.

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What is stronger MDF or plywood?

MDF is ideal for cutting, machining and drilling, since it does not chip easily. On the other hand, plywood is a much more stronger material, which can be used for doors, floors, staircases and outdoor furniture.

Should you nail or screw subfloor?

Using code-approved screws rather than nails is the best option for avoiding movement. If using nails for subfloor installation, stick with ring-shank nails; smooth nails may withdraw easier, leading to squeaks.

What do you fasten subfloor with?

When time is of the essence, nailing is the quickest fastening option when installing subfloor. Regardless of firing mode, an air nailer lets you drive nails within seconds of each other, which saves time compared to using a screw gun.

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