How do you screw down a plywood subfloor?

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Quote from Youtube video: Every six inches like so go on go on both sides. 36 next ones up there. We do the same thing over here.

Can I use wood screws for subfloor?

There are many types of screws for plywood and OSB subfloor. You’ll want to use #8 1-1/2 inch wood screws spaced 8 inches apart to secure a 5/8″ OSB subfloor to the floor joist or floor truss. For 3/4 inch plywood, it would be best to step up to a 2-inch wood screw to account for the added thickness.

Should plywood subfloor be nailed or screwed?





For plywood, wood plank, or OSB subflooring, you can use either nails or screws to secure everything and attach it to the joists underneath. You don’t need to use either screws or nails on concrete subflooring because it is poured as a solid reinforced slab.

Is it better to screw or nail 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 screws to use for 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.

What is the best screw for plywood?

Best Wood Screws for Plywood- Buying Guide & Review

  • Kreg SML-C1-500 – Best Screws For Plywood Cabinets.
  • Kreg SML-C125-500 – Screws For Plywood Sheathing.
  • Vigrue M4 Black – Screws For Plywood Wall.
  • Velocity Screws For Plywood – 200PCS Stick Tight Wood Screw.
  • Hard To Find Fastener For Plywood – Philips Flat Twinfast Screws.





What size screws 3/4 plywood?

As a result, you’ll need a longer size wood screw to help secure joints at the end of boards. This is one of the most common types of construction I do in the shop — attaching a sheet of 3/4″ plywood to a carcass made of 3/4″-thick lumber. The #8 x 1-1/4 screw is perfect for bringing these two boards together.

Can you use deck screws for subfloor?

If you’d like to try another kind of screw that isn’t specifically designed as compatible with subfloor projects, you could try using deck screws. Whatever you do, don’t use drywall screws for the subfloor.

How far apart should screws be in plywood?

Generally, nails (6d ring or screw shank, or 8d common) should be spaced 6 inches on center along supported panel edges and 12 inches on center on the panels’ interior supports, or as specified on the construction drawings.

Can you screw down subfloor?



To make the job easier for you and the drill, we suggest that you pre-drill holes before screwing the subfloor down. Use a drill bit slightly smaller than the screw and keep the hole short of the length of the screw. In other words, if using a 2-inch screw, drill only a 1 1/2-inch-deep hole.

What goes on top of 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.

What thickness should subfloor be?

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. There are several factors that determine what subfloor thickness is optimal for added benefits like insulation.

What does a subfloor sit on?



The subfloor is the thick flat surface on which all other layers rest. The subfloor is the bottom-most layer and it rests on the joists. If you have a concrete slab floor, the slab may be considered the subfloor.

How do you add a second layer of a subfloor?

Second Layer Installation



First layer must be dry prior to laying the second layer. Place a layer of 15-lb felt on top of the subflooring prior to installing second layer. Adhesives should not be used to fasten the two layers together. Install second layer on top of the first layer inside of the wall studs.

What are flooring screws?

Flooring screws are suitable to use with a wide range of flooring including softwood, hardwood and fibreboard. They are easy to install, often with no pivot required and they are designed to prevent boards from splitting. Available in a wide range of sizes and finishes for both domestic and commercial projects.

What do you put between subfloor layers?

A felt underlayment for hardwood floors is a wise choice. It’s water resistant and has a vapor shield preventing noxious fumes from transferring into the room, and its thickness creates an effective sound barrier. A 15-pound felt paper under hardwood prevents the hardwood from warping.

What is underneath a subfloor?



Underlayment



The underlayment material is installed below the floor covering and placed on top of a subfloor. Under the visible covering, there is a layer made of soft or foam-like materials with a thickness of between 1/4 – 1/2-inch.

What are 3 common subfloor materials?

Common Subfloor Materials. There are four primary materials used as subfloor: plywood, oriented strand board (OSB), concrete, and high-performance panels. There are other subfloors materials out there, but they are used in more niche situations. The construction industry is constantly evolving.

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. You can think of your floor like a sandwich cookie.