Should you nail or screw subfloor?

Overall, screws tend to be somewhat more expensive, but like nails, some offer better quality for a higher price. With that said, it’s imperative you choose a fastener compatible with your subfloor thickness and material. The quality and correct type of subfloor fastener can literally make or break your floor.

Second, you want to make sure the subfloor is properly glued and screwed to the floor joists; if it’s not, there will be squeaking and creaking. 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.

Also, can I use deck screws for subfloor? Deck screws are a good choice. Don’t use drywall screws; they’re prone to the heads snapping off. You can either drill pilot holes slightly larger than the screw diameter (through the thickness of the subfloor only) or use a self-drilling screw without threads on the top 3/4″-1″.

Furthermore, what screws should I use for subfloor?

Steel Screws 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.

Do I need to glue plywood to subfloor?

On the 3/4″ subfloor, you have the right idea. Use subfloor adhesive, and screw 8″ at edges, 12″ in field. For the 1/2″ underlayment, ideally, you want to screw every 6″ all across the panel. Adhesive will help you here, as the subfloor plywood will have voids in spots that will not hold a fastener.

How many layers of plywood do you need for a subfloor?

There are several methods, including: Floating subfloor: There are two common methods for this. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top.

How do I stop my subfloor from squeaking?

prev. squeaks occur when subfloor separates from joists. use shims for smaller gaps in subfloor and joists. Slide the Shim Into the Gap. use short screws to fasten subfloor and floor. Fasten the Subfloor to the Floor. locate squeak in floor and drive nail into joist. peel back carpet and use screw to subfloor.

Should subfloor be glued?

Glue. Although using a subfloor adhesive is not required by code, it is a standard practice that can help prevent floor squeaks by reducing the chance for movement at the panel-to-joist connection. A quality subfloor adhesive will also increase the overall stiffness of the floor.

How thick should a subfloor be?

Typically made of plywood or OSB and ranging in thickness from 19/32″ to 1 1/8″ thick, the subfloor is truly structural, second only to joists in this respect. Subfloor holds up all of the above layers of flooring, as well as everything in your house—people, dogs, cats, pianos, furniture. All houses have subfloors.

How long should a subfloor screw be?

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.

How do you fill gaps in subfloor flooring?

Fill Plywood Subfloor Gaps An effective strategy for filling large gaps is to mix patching compound to a stiff, mortar-like consistency, trowel it into the plywood subfloor gaps and wait for it to stiffen before troweling it smooth. Some sanding may be needed when it sets completely.

How many screws do I need for a 4×8 subfloor?

Use 8d common nails, spaced 6″ apart on edges and 12″ apart in the field. 1 1/8″-1 1/4″ panels.

How thick should Plywood be for flooring?

Thickness of Plywood The National Wood Flooring Association recommends a minimum plywood panel thickness of 7/8-inch for joist spans of 19.2 to 24 inches, and a minimum plywood panel thickness of 5/8-inch for joist spans of 16 inches or less.

Can I put new subfloor over old subfloor?

One of the benefits of removing the old flooring is it allows you the chance to fix any loose subflooring or squeaks by re-securing the main subfloor to the floor joists prior to installing the new flooring. With all that being said though the answer is YES you can install New Wood Flooring over the old.

What is the best material for subfloor?

Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring.

How do you fasten Luan to subfloor?

Start in one corner of the room and lay a full sheet of luan perpendicular to the direction of the subfloor panels. Leave a 1/16 inch gap between the walls and the luan panel. Use a staple gun to insert 1/4-inch crown staples every 6 inches across the plane of the luan panel and every 2 inches along the edges.

How many screws do I need for underlayment?

According to the American Plywood Association installation Guide, they recommend #4 x 1 1/2″ ring shank nails as fastners with spacing 6″ OC along all edges and 8″ OC each way in the field. The underlay is to be installed perpendicular to the subfloor.

What screws for OSB subfloor?

Use OSB panels rated for the distance between the floor joists. Run a bead of construction adhesive along each joist and lay the OSB panel on the joists. Nail the panels with 10d common nails or #10, 2 1/2-inch wood screws spaced 6 inches apart along the edges and 12 inches apart in the middle.