Yes! Clean it well, vacuum it, and add subfloor screws to the subfloor so it’s secure to the joists. Then you can lay down some pL400 and another layer of plywood. Screw that down too, into the joists as well.
Can I put plywood over subfloor?
Plywood is a great underlayment to install over a subfloor. It is strong and durable and often very smooth without a lot of imperfections or knots.
Is 3/4 plywood OK 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.
What is the best thickness for plywood for a subfloor?
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.
What wood do you put over subfloor?
A wood subfloor should be OSB or plywood of 3/4″ or thicker for a hardwood floor installation. Particle board and chipboard are unacceptable for solid hardwood installations, but may be used in an engineered flooring install.
Can you put plywood on top of plywood?
Install a layer of at least ½” or preferably 5/8” ply over the existing planks. This is particularly important if your old sub floor has lumps and bumps in it. If you don’t respect this thickness of ply, then you’re highly likely to see rises and falls in your new flooring.
How do you attach plywood to plywood subfloor?
Quote from the video:
Quote from Youtube video: Remember to leave an eighth to a quarter inch expansion joint between the panel. And the wall. Stand on each panel during fastening to ensure full contact with the subfloor fasten.
Do you need plywood on top of subfloor?
Plywood underlayment is typically needed when a floor material must have a very smooth, flat surface. For example, if you install resilient tiles or sheet flooring over a subfloor, any bumps, dips, or voids in the subfloor may be evident in the finished flooring.
Do I need 2 layers of subfloor?
That’s the usual approach. Almost no one puts down double-thick subfloor in residential applications (for cost and handling reasons), and both layers need to be fastened to joists. Only thin underlayment can be fastened just to the subfloor.
Should subfloor be 2 layers?
The subfloor has to be attached to the joists, and two subfloor layers glued together or just nailed through to the joists, is no different than one thicker subfloor layer.
Can you put plywood over wood floors?
Subfloor Options
Plywood is the best subfloor choice to lay on top of the pine because it nails in securely and creates a flat, even surface for the new floor to adhere to. When laying it over an existing floor, a thinner plywood panel is acceptable; it should be at least 1/4 inch thick.
What do you put on top of a subfloor?
Underlayment: Some types of flooring can be installed directly on top of the subfloor, such as vinyl flooring. Other types need a middle layer, called underlayment, such as laminate,carpet and tile.
How thick does the subfloor need to be for hardwood flooring?
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.
What size screws 3/4 plywood subfloor?
The proper steel screw sizes for securing 3/4-inch plywood to the floor joists are #8, #10 and #12 screws. The number refers to the thickness of the screw. Each is available in lengths from 1 1/4 to 3 inches. Typically, the 3-inch variety is used to secure plywood subfloors.
Is it better to use OSB or plywood for subfloor?
OSB has a lower resale value than plywood due to its lower strength. For this reason, few homeowners prefer OSB in their homes. Apart from costs, plywood is superior in all the other areas, such as the strength of the structure. For this reason, it’s a superior material for use on the subfloor.
Which way do you lay plywood subfloor?
Install plywood underlayment smooth side up. To avoid damage to the surface, install underlayment immediately before laying the finish flooring.
Should subfloor be screwed or nailed?
Ideally, nail down your subfloor using corrosion-resistant nails that will securely hold it in place and last a long time. Screws are a great alternative that you can easily remove, but they are not as sturdy. Screws are superior in terms of reducing floor squeaks, but the installation is slower.
Should you stagger plywood flooring?
The end joint is where one board or plywood sheet butts up against another. In almost every situation, it’s important to stagger these joints to avoid straight lines that extend in a perpendicular direction across the lengths of the boards.
Do you stagger plywood flooring?
More plywood sheets are nailed down, staggering seams for a stronger fit. When you build, you always stagger. It’s what makes a pile of boards and materials into a solid structure. Stagger stagger.
How many layers of subfloor should you have?
Most floors in residential homes consist of four layers.
Do you need a moisture barrier on wood subfloor?
Do I need a vapor barrier for hardwood floors?” The answer is YES! Moisture can destroy hardwood flooring. It causes cupping, warping, and even mildew if not treated. You must install a moisture barrier to protect your flooring from water wicking up from below.
