Subfloor screws also come in varying thicknesses or diameters. RIDGID 3 in. Again, use spacers to leave gaps between panels and at the. What type of fastener should I use for installing 3/4" plywood on top of floor joists? If you are using inch plywood, you would want to use screws that range from 1 and inches to 2 inches in length. Serrated Flat Head Star Drive Cement Board Screws (575-Pack) $31.30. Drive in the nails working from one corner toward the corner at the opposite end. To find out which length of screw you'll . Use #10 2 inch wood screws to fasten, spacing them six inches apart . Thread Starter. When you're installing an interior subfloor using 3/4-inch plywood, you're going to want screws that are labeled #8, #10, or #12. Thanks. Step 4: Acclimate Plywood. I am thinking #8 length 1-1/4 inch, but I am really not sure. Place these screws no more than 18 inches apart to keep it from warping. Steps to Install 3/4 Inch Plywood Subfloor. Subfloor is currently 1/2 in plywood with particle board over that (previous flooring was carpet). It also means that no one screw is under too much pressure. This can lead to weaker connections, an inability to withstand the burden reliably, warping during periods . What screws to use on plywood? For instance, the smaller threads on a ring shank nail can come loose in a plywood subflooring panel. CDX plywood should be a minimum of 7/16 inch thick. So, you'll need 12 screws down the 8-foot length of OSB or plywood. Depending on the exposure to moisture, two types of screws are used to secure plywood subfloors. Steel screws are also the most common, and most recommended, screws used for subfloor installation. GRK 772691020697 R4 Screws have always been the highlight of GRK's product range. Used to stop a squeaking plywood subfloor before putting down a hardwood floor on top. Location: USA. Different types of screws:An array of subfloor screws is widely available in the market. No matter what the . Hoping for some advice on a ceramic tile installation over 5/8 plywood subfloor on the second floor of our 1974 split level house. Check the uneven plywood subfloors for loose nails, screws, and staples that stick up above the surface and remove these. This will give the wood room to breathe if it needs to and prevent the finished flooring from warping. Use the above specs as minimums and upgrade to screws to avoid squeaks. Besides staggering the plywood subfloor seams, screwing and gluing the subfloor down is considered the correct method of installation by construction professionals. If the plywood subfloor you're placing is 5/8 of an inch thick, you need a screw about 1 5/8 inches long. Hamilton Tile of Woodstock, GA fixes this rotten sub floor in this master bathroom in Marietta, GA and we explain our system for screwing down the plywood su. Position the nails at '' apart along the edge and 2'' on the center of the . The shortest ones are 1 1/14 inches, while the longest are 3 inches. The exact measurements can vary depending on what type . Some of the info I have seen says to use decking screws. Plywood underlayment is the layer of plywood that is fastened over the structural subfloor. As part of the prep process I am adding screws to supplement the plywood sub-floor nails. Secure the plywood on the subfloor using wood screws. The new Strong-Drive WSV Subfloor screw has been developed for fastening subfloor sheathing using the Quik Drive auto-feed screw driving system. They are square drive, yellow zinc, and range from 1-1/2" to 3". Assuming a remodel, this is going to involve bringing the plywood to the location by hand, as opposed to assistance by a crane. Step 1: Get the plywood to the right level of the house. They are also very strong and durable, they won't warp, break, or move around for a very long time. Measure the dips using the ruler or tape measurer. When securing OSB or plywood subflooring, you should use a screw every 8 inches along the floor joist or truss. Bathroom Subfloor Questions for Ceramic TIle. The edges that are perpendicular to the joist cannot. If your floor joists or trusses are 16 inches on center, you'll need 48 screws per 48 sheet. - When using screws to install plywood, you may want to drill pilot holes to help keep the plywood from splitting. WSV screws can be easily backed out, allowing for future access to floor cavities. Posts: 174 Received 1 Vote on 1 Post Plywood sub floor - Nails or Screws. Who gives so many options? Are staples and glue an acceptable way to secure the second layer of plywood, or should it be screwed down? Drive screws through the subfloor into floor joists to replace any loose nails. Nailing plate needed to be added over that drain. These numbers indicate the diameter or thickness of the screws. It creates a uniform, smooth surface for resilient flooring, vinyl tile, ceramic tile, carpet, engineered flooring, and wood floors. The 3-inch steel screws are used in plywood subfloors. Don't stack too much plywood on the same set . 8-10" in the field is sufficient. Check wood subfloor . Measure the dips using the ruler or tape measurer. If you space the joists farther apart than that, you will want inch plywood and 1 inch OSB. On this size plywood, . B. Drive screws through the subfloor into floor joists to replace any loose nails. Subfloor is typically screwed 6" +/- on the edges- which there is only 2. Upvote # 3 08-14-14, 01:14 PM A amateurplumber Member Thread Starter Join Date: Mar 2013 Posts: 116 My contractor said he'll replace the particle board with 1/4 in plywood and secure it using staples and glue. This is awesome, right. So if your subfloor is 3/4 of an inch thick, any screw about 1 3/4 inches long will do the trick. What size number and length of screws should I use to screw 1/2 plywood underlayment to subfloor? Meanwhile, I looked on the Senco website and found screws designed for securing plywood to wood. Amazon.com: Senco 08F200Y Duraspin# 8 by 2" Subfloor Collated Screw (1, 000per Box) : Everything Else . And use construction adhesive between the joist and subfloor, too. Use a " spacer between the plywood and the wall and a 1/8" spacer between panels. Their wide variety of screws has proved to be both functional and durable for users. When installing plywood subflooring, you typically screw the sheets down every 12 inches along the edges and every 6-8 inches in the field. Check the uneven plywood subfloors for loose nails, screws, and staples that stick up above the surface and remove these. 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. You should also make sure that you are leaving about " between the underlayment and the wall. Along the edge, space out the fasteners '' apart and 2'' apart on the rest of the plywood. 3. And here is the proper way to identify what length you need: Identify the thickness of your subfloor. Worked flawlessly with the Metabo HPT SuperDrive which is another back saving device that made the project a quick one with a lot less sweat and sore . Plywood and OSB have a strength axis that should run across the joists. A 3/4 inch sheet of plywood weighs approximately 75 lbs. This will ensure that the subfloors are stable and secure. This item: #8 x 1-3/4 in. Most construction experts use 3-inch steel screws for plywood subfloors. a guide to buying determining spans and spacing for wall shelves. $169.00. Thread Tools Search this Thread #1 05-19-08, 09:18 PM J. jaspers95. Backer-On #9 x 1-5/8 in. Underlayment Underlayment goes on top of the subfloor, and you don't necessarily need it for structural integrity. A screw of 1 5/8 inches is perfect for a 5/8 inches plywood subfloor. How many screws are in a 4x8 sheet of subfloor? Next, lay a second layer of plywood at a 45-degree angle to the first layer. 1 5/8 inches should be good enough. This is an unusual size but still, the size of the screw should be chosen carefully. This includes - steel, galvanized, and many more. The only rule of thumb applies for the depth of screw, not spacing. Instead of turning the top layer, simply stagger its joints with respect to those of the subfloor. 23/32 subfloor: A subfloor of 23/32 inches should have 1-1/4 screws attached to them. The thicknesses are as follows: 7/16-, 15/32- and 1/2-inch-thick panels require . 2. However, if you are installing an extra layer of plywood over an existing subfloor, you will need to screw the new plywood down every 4-6 inches. For the most comprehensive selection of nails look for Grip-Rite Fasteners. Plywood sub floor - Nails or Screws. Join Date: Jul 2006. It should not be so long that it penetrates the combined thickness of the plywood underlayment and subfloor. Top 12 Best Plywood Screws In 2021 1. The holding power of WSV screws pulls the subfloor to the joist, virtually eliminating floor squeaks. To install a floated subfloor system, first place a layer of plywood subfloor panels with the edges parallel to the wall. Use a spirit level on the subfloor to assess the entire floor where uneven spots exist. . Part of the reason for this is because they keep the plywood from breaking and cracking while they are being installed. If your joists are spaced between 16 and 19.2 inches apart, you should utilize inch plywood and OSB. Yellow Subfloor Collated Screw (1000-Count) $38.98. The length of the selected fastener should be a minimum of 5/8. Product Overview. Sure looks like you tried to add to a 2 X 4 under the subflooring on the right, useless. Some are specialized for indoor and some for the exterior parts. As far as spacing, I used the "nailing" configuration shown in the bottom right of the detail below. Plywood Sub-Floor Screws jimmiem | Posted in Construction Techniques on August 23, 2013 07:29am I'm replacing the wall-to-wall carpeting in my house with solid hardwood flooring. They are labeled as #8, #9, #10, and #12, which are the recommended diameters if you are working with -inch thick plywood. Blocking should have been added between the joist. Start with a ripped half sheet and stagger the butt joint by two joists. See our complete plywood underlayment installation video at www.InstallSurePly.com. . If a wood subfloor has any loose or squeaky boards, screw them to the floor joists (or nail using ring shank nails). Last edited by ctwindow; 12-31-2014 at 09:26 AM.. 12-31-2014, 11:31 AM QIS : 920 posts, read 4,861,051 times Reputation: 576. Now, if you are going over this subflooring with another layer, no glue and intentionally miss the joists with the next set of screws. The fasteners should not protrude out of the bottom side of the subfloor. I'd use 2-1/2" where your screwing through the plywood down into floor joists, and 2" where your just screwing the 2 plywood sheets together (not screwing down into the floor joists). Member. The best suggestion for this is to use a shop vac because you can use it for both wet and dry materials. You should use deck screws with no less than an inch . The spacing of the screws may seem like a small and silly detail, but it is a surprisingly important one. No announcement yet. This particular screw model of R4 has been on the top of popularity charts ever since its release. You can choose 3-12 lengths of screws compatible with the size of plywood you are using. 2 First, I'd counter your plans to orient the second layer perpendicular to the subfloor. When installing subfloors, you will want to space the screws every 6-8 inches apart. As far as fastening, for a subfloor it is recommended to apply construction adhesive along each joist, then lay the panel on the joist. Be careful! Still, this is slower than the pneumatic nailgun. You'll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it. Underlayment covers subfloor flaws for the best possible results. I calculate I will have to drive 3000 of them, necessitating the use of a collated screwdriver. Drywall and Deck Collated Screwdriver. Plywood underlayment is typically needed when a floor material must have a very smooth, flat surface. So that's 1-1/4" thick. Between using nails or screws to put down a subfloor, screws are more durable and have the capacity to stay and hold longer than nails. Glue is sprayed between each layer and the sheet is hot pressed. Subfloor should have been cut out with a toe kick saw even with the bottom plates or at least a sawsall. I expect the screws to cost more, too. In addition, you'll find that steel screws come in a number of different lengths. For 3/4 inch plywood, it would be best to step up to a 2-inch wood screw to account for the added thickness. Return to the starting corner and drive fasteners through the 4 foot edge. +1, I feel like when we used to do this, we used 4" on the perimeter and 8" on the field, but we also joked that the local airport had to realign their compass when we finished a project. You can also use screws to remove a squeak in the subfloor caused by the subfloor moving against the nails. If you have inch quarter wood, then the best size screws to go with this type of material range between 1 and inches long up until around 2 and a 1/2 inches in length. Use a spirit level on the subfloor to assess the entire floor where uneven spots exist. 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. First, be sure that the floor is completely clean from all nails, screws, glue, staples, carpet fibers, dust, and thinset. Partially threaded will tend to pull the wood down to the joists better. Now you're ready to install the new underlayment or subfloor. The center of the subfloor as a rule without using adhesive is 8" in the field and the joist span dictates the dimension the other way. Inch, but I am thinking # 8 length 1-1/4 inch, but am. First layer plywood and the wall and a 1/8 & quot ; spacer between the joist subfloor. 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