FAQ: How To Install A Plywood Subfloor?

Do 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.

Can I put plywood over subfloor?

To add an extra layer of plywood over a subfloor, you will need to clean the floor to ensure there is no dirt and grime. After cleaning, you will install the plywood over the subfloor one sheet at a time. However, you need to make sure the plywood seams are over the subfloor so that it provides adequate stability.

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.

Can I use screws for subfloor?

Screws need to be twisted into the subfloor, which takes more time than simply shooting a nail into subfloor material. However, some screw guns, like the Senco DuraSpin DS440-AC, are auto-fed. A collated strip of screws in this case makes screwing subfloors a little faster, although it’s not as swift as nailing.

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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.

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.

What is the best plywood for underlayment?

Poplar or Birch Plywood with a fully sanded face and exterior glue. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. There is a wide variety of quality and species classed as lauan.

Is it better to use OSB or plywood for 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 the difference between subfloor and underlayment?

Basically, subfloors are a structural part of your home that provide strength and rigidity to your home’s flooring. Underlays, on the other hand, protect your floor covering from moisture, help soundproof your floor, and offer cushioning and comfort underfoot.

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Do you install subfloor before framing?

If you use a product like DriCore for the subfloor, they even explicitly recommend you frame on top of their subfloor product. They do, however, recommend you screw the framing through the subfloor into the concrete with something like 3″ Tapcons spaced every 4 ft through the bottom sill of the framing.

What is underneath a subfloor?

A subfloor is the solid material beneath your floor covering. It is attached to your home’s floor joists and acts as a base for your finished flooring, such as carpet, hardwood, laminate, tile, etc. Typically, a subfloor is made of plywood or oriented strand board (OSB) panels.

Do you screw down DRIcore?

Remember that DRIcore must be installed as a floating floor. Normally it is not recommended to nail, glue or screw DRIcore panels to the concrete surface. In some instances, we suggest minimal fastening of the panels to the concrete surface.

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