As with all major construction projects, you should consider consulting a professional before attempting a job like this on your own. A 3/4 inch sheet of plywood weighs approximately 75 lbs. Fasten your first layer plywood subfloor as you normally should. The subfloor is typically made from plywood or oriented strand board (OSB). This is made easier if you have a caulk gun designed for subfloor installation like the one shown below. Charlie: Or super glue. Concrete slabs should be flat, use a leveling compound to fill any depression or voids. Charlie: Okay. (There is a picture of this below.) These chalk lines run the entire depth of the Momplex, perpendicular across each floor joist, every four feet. If the house is out of square, it will make it exceedingly difficult to get the plywood straight on the joists. Select the smooth side of the plywood to be facing up. We started first with a 1/2 sheet. Remember, plywood only has a tongue and groove on the sides, not on the edges, since these will be nailed into the joist. (See our wood joist comparison.). At 16″ on center, there will be 7 joists under each piece of plywood, and each piece will end in the middle of the next joist. Steps to Install 3/4 Inch Plywood Subfloor Step 1: Get the plywood to the right level of the house. Shellac is not a long term solution to prevent the plywood subfloor from delaminating under the elements; however, it does provide some additional weather protection in the short term, and is worth the relatively small time and money investment for a project like this where it could be several weeks before the floor is under roof. Step 2: Measure and dry-set the first piece. How to Install a Subfloor on Joists Submitted by Ana White on Thu, 10/13/2011 - 00:50 We put the upstairs floor joists up, and I thought the very next day I'd be getting a sun tan on a roof top deck. Then when we went to put the remaining piece in, everything keeps to the pattern, fitting just right, like a perfect puzzle, only the pieces are 48" x 96" and weigh 90 pounds. Did you leave any expansion gaps between the short ends of the plywood? It was getting pretty late when we finally finished up. Installing wood subfloors over concrete how to install a plywood subfloor one installing wood subfloors over concrete how to install a subfloor on joists how to install subfloor panels 9 common subfloor mistakes and how to. Never go longer unless you have rechecked the spanning distance on the plywood and joists you are installing, as this could create a weak spot in the floor. This is particularly important if your old sub floor has lumps and bumps in it. Conclusion. It's what makes a pile of boards and materials into a solid structure. 7.2 - Measure and cut the plywood panels so interlocking joints meet at the center of the sleepers. You can see in this picture that the plywood sheets making up the subfloor in this house are tightly joined together. If you tighten the plywood down to the joists near the edge, it is much more difficult to install the sheet. So it is critical that the second sheet of plywood stagger those weaks spots to get maximum rigidity in the floor prior to tiling. I build and share smart, stylish diy projects. Although OSB (orient strand board) is sometimes used, the most commonly used type of wood is C-D grade tongue and groove plywood. All Rights Reserved. Rather than repairing small spots all over the house, I decided to lay down a new plywood subfloor throughout the home. Article quote from - Position of Underlayment to Prevent Cracked Tile … Step 4: Set the plywood on the construction adhesive with the tongue oriented towards the groove of the adjacent sheet. Dry-setting is important. Make sure the plywood is square. The right glue is very important here, it's what keeps your floor from squeaking. Errors tend to compound as you work through these steps. Replacing Entire Subfloor With new 5/8″ Plywood. ⚛ The information about How To Install Plywood Subfloor Over Joists Easy Steps For Installation is completely presented here. Step 2: Measure and dry-set the first piece. Many manufacturers recommend applying a continuous ¼-inch-diameter glue bead to framing members and using a serpentine pattern for supports that are 3½ inches or wider. If you did this without a block, it would destroy the groove and make fitting the next row of plywood very difficult. Laying your first piece in the outside corner of the floor you want the long dimension of the plywood to lay across six joists with the final edge ending up in the center of the 6th joist. Dry fit components first to make sure sheets land on the center of joists. We did this by simply starting with a 1/2 sheet of plywood on the first row, followed by a full sheet of plywood on the next row. On the four foot edges, your seams will fall on joist tops, so no need for tongue and groove. https://vinawoodltd.com/wp-content/uploads/2020/09/logovinawoodsmall1-1.png, https://vinawoodltd.com/wp-content/uploads/2020/11/trim-edge-of-plywood-subfloor.jpg, Copyright © 2020 VINAWOOD Co., LTD. Headquarter: 92 Thien Duc, Yen Vien, Gia Lam, Hanoi, Vietnam | Hotline: +84-83-333-2333 | Email: Email: plywood@vinawoodltd.com |, Consider both load bearing capacity and deflective properties when selecting subfloor materials. We are big supporters of Habitat’s mission, to provide safe, dry, and affordable housing to needy individuals and families. I knew that overall, the finished product would be far more level and feel more solid. Always install plywood or OSB long-ways across the joists. 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