how many layers of plywood for subfloor

While plywood makes an admirable subfloor, it can be expensive, especially when installed in multiple layers, and so less expensive alternatives have been developed. And one of the more crucial layers is one that is almost never seenthe underlayment that is found just under the surface floor covering. I need your help. Laminate Flooring on Two Layers of Plywood Subfloor? While plywood makes an admirable subfloor, it can be expensive, especially when installed in multiple layers, and so less expensive alternatives have been developed. LP Building Products offers Top-Notch, an enhanced subflooring system with an edge coating to prevent water absorption and a self-draining notch design that drains standing water away from the panels (view on Lowe’s). It’s affordable, easy to work with, and durable. … Mobile home subfloor thickness may be of some concern, and installing plywood over this subfloor can give you a stronger base for your hardwood, laminate or carpeting. 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. Should I just stand up nails between the sheets, and then pull them out? One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top. You agree that BobVila.com may process your data in the manner described by our Privacy Policy. Which is the better option, plywood vs. OSB? The second (top) layer of plywood joints should not coincide with the joists and the second layer should not be fastened to the joists. Here are the different components: Joist – the joist of your floor is the bottom-most layer that holds up your entire floor. Your subfloor provides an excellent, level foundation for the flooring of your home. Or if existing planks are in good condition- install hardwood floor on top of it, plywood is nor really needed, it will raise your floor too. The fix is to use water-repellent or water-resistant products in place of ordinary plywood or OSB. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring. we are renovating a 1970 built home and have taken out the existing carpet and linoleum, along with the 5/8" particle board subfloor, leaving only a 1/2" plywood layer, not t&g, over joists 16" oc. I plan to adhere, with thinset, another 5/8" or 3/4" layer of plywood along with a waterproofing membrane. It's made from plywood ranging in thickness from 19/32 to 1 ⅛ inch thick. Soundproofing - I can't mention that in the main question or else it automatically gets flagged that i'm asking about soundproofing, which isn't allowed. CDX plywood is like other laminate plywoods, but the outer layers of laminate are grades "C" and "D," which means they are cosmetically rough and contain many imperfections, thus lowering their cost. Use your glue gun to spread the glue over the sheet, in a criss-cross pattern that comes within a few inches of the outer edge of the board of the sheet and doesn't leave more than one square foot of plywood without glue on it. Therefore, adding an extra layer of flooring on top of your subfloor can help create the floor of your dreams! Pencil. When a roofless, partially built structure takes on water, the plywood or OSB used for floor decking can absorb water, swell, delaminate, and require sanding or replacement before finish flooring can be installed. ._1zyZUfB30L-DDI98CCLJlQ{border:1px solid transparent;display:block;padding:0 16px;width:100%;border:1px solid var(--newCommunityTheme-body);border-radius:4px;box-sizing:border-box}._1zyZUfB30L-DDI98CCLJlQ:hover{background-color:var(--newCommunityTheme-primaryButtonTintedEighty)}._1zyZUfB30L-DDI98CCLJlQ._2FebEA49ReODemDlwzYHSR,._1zyZUfB30L-DDI98CCLJlQ:active,._1zyZUfB30L-DDI98CCLJlQ:hover{color:var(--newCommunityTheme-bodyText);fill:var(--newCommunityTheme-bodyText)}._1zyZUfB30L-DDI98CCLJlQ._2FebEA49ReODemDlwzYHSR,._1zyZUfB30L-DDI98CCLJlQ:active{background-color:var(--newCommunityTheme-primaryButtonShadedEighty)}._1zyZUfB30L-DDI98CCLJlQ:disabled,._1zyZUfB30L-DDI98CCLJlQ[data-disabled],._1zyZUfB30L-DDI98CCLJlQ[disabled]{background-color:var(--newCommunityTheme-primaryButtonTintedFifty);color:rgba(var(--newCommunityTheme-bodyText),.5);fill:rgba(var(--newCommunityTheme-bodyText),.5);cursor:not-allowed}._1zyZUfB30L-DDI98CCLJlQ:active,._1zyZUfB30L-DDI98CCLJlQ:disabled,._1zyZUfB30L-DDI98CCLJlQ:hover,._1zyZUfB30L-DDI98CCLJlQ[data-disabled],._1zyZUfB30L-DDI98CCLJlQ[disabled]{border:1px solid var(--newCommunityTheme-body)}._1O2i-ToERP3a0i4GSL0QwU,._1uBzAtenMgErKev3G7oXru{display:block;fill:var(--newCommunityTheme-body);height:22px;width:22px}._1O2i-ToERP3a0i4GSL0QwU._2ilDLNSvkCHD3Cs9duy9Q_,._1uBzAtenMgErKev3G7oXru._2ilDLNSvkCHD3Cs9duy9Q_{height:14px;width:14px}._2kBlhw4LJXNnk73IJcwWsT,._1kRJoT0CagEmHsFjl2VT4R{height:24px;padding:0;width:24px}._2kBlhw4LJXNnk73IJcwWsT._2ilDLNSvkCHD3Cs9duy9Q_,._1kRJoT0CagEmHsFjl2VT4R._2ilDLNSvkCHD3Cs9duy9Q_{height:14px;width:14px}._3VgTjAJVNNV7jzlnwY-OFY{font-size:14px;line-height:32px;padding:0 16px}._3VgTjAJVNNV7jzlnwY-OFY,._3VgTjAJVNNV7jzlnwY-OFY._2ilDLNSvkCHD3Cs9duy9Q_{font-weight:700;letter-spacing:.5px;text-transform:uppercase}._3VgTjAJVNNV7jzlnwY-OFY._2ilDLNSvkCHD3Cs9duy9Q_{font-size:12px;line-height:24px;padding:4px 9px 2px;width:100%}._2QmHYFeMADTpuXJtd36LQs{font-size:14px;line-height:32px;padding:0 16px}._2QmHYFeMADTpuXJtd36LQs,._2QmHYFeMADTpuXJtd36LQs._2ilDLNSvkCHD3Cs9duy9Q_{font-weight:700;letter-spacing:.5px;text-transform:uppercase}._2QmHYFeMADTpuXJtd36LQs._2ilDLNSvkCHD3Cs9duy9Q_{font-size:12px;line-height:24px;padding:4px 9px 2px;width:100%}._2QmHYFeMADTpuXJtd36LQs:hover ._31L3r0EWsU0weoMZvEJcUA{display:none}._2QmHYFeMADTpuXJtd36LQs ._31L3r0EWsU0weoMZvEJcUA,._2QmHYFeMADTpuXJtd36LQs:hover ._11Zy7Yp4S1ZArNqhUQ0jZW{display:block}._2QmHYFeMADTpuXJtd36LQs ._11Zy7Yp4S1ZArNqhUQ0jZW{display:none}._2CLbCoThTVSANDpeJGlI6a{width:100%}._2CLbCoThTVSANDpeJGlI6a:hover ._31L3r0EWsU0weoMZvEJcUA{display:none}._2CLbCoThTVSANDpeJGlI6a ._31L3r0EWsU0weoMZvEJcUA,._2CLbCoThTVSANDpeJGlI6a:hover ._11Zy7Yp4S1ZArNqhUQ0jZW{display:block}._2CLbCoThTVSANDpeJGlI6a ._11Zy7Yp4S1ZArNqhUQ0jZW{display:none} If just overboarding then a minimum 6mm thickness is required. Plywood is actually composed of several layers of wood glued together. Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. This shift could cause the plywood to move independently of each other. ). When the square-edged plywood is screwed down to the floor, there is a tendency of the wood shifting while the skoolie is moving. Plywood consist of some veneer plies or layers . 2. You plan on driving on it or something? The best way to determine whether a mold problem exists on a subfloor is to remove the finish flooring material. THEN add the 5 lb. Using green joists. The 16" o.c. Floating subfloor: There are two common methods for this. .ehsOqYO6dxn_Pf9Dzwu37{margin-top:0;overflow:visible}._2pFdCpgBihIaYh9DSMWBIu{height:24px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu{border-radius:2px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:focus,._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:hover{background-color:var(--newRedditTheme-navIconFaded10);outline:none}._38GxRFSqSC-Z2VLi5Xzkjy{color:var(--newCommunityTheme-actionIcon)}._2DO72U0b_6CUw3msKGrnnT{border-top:none;color:var(--newCommunityTheme-metaText);cursor:pointer;padding:8px 16px 8px 8px;text-transform:none}._2DO72U0b_6CUw3msKGrnnT:hover{background-color:#0079d3;border:none;color:var(--newCommunityTheme-body);fill:var(--newCommunityTheme-body)} The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. Add 3/4 inch plywood with green glue between the wooden board subfloor and the plywood. can i have ONE monolithic layer of 1 & 1/8" plywood down for the subfloor, OR would it be better (cost-wise, structurally, or whatever) to have TWO layers (laid @ 90 deg to each other) as long as they add up to the requisite 1 & 1/8 inches? If the number of plies/layers is more, the plywood sheets will be stronger and the production costs will be higher .The Number of Plies/Layers for plywood in each thickness are listed here. One substantial advantage of epoxy is that the forms a hard, durable layer that is stronger than paint or hard oil. mortar Single layer of plywood or OSB Joists, I … Carpenter's glue with glue gun (see container for square footage covered by each tube of glue) Tape measure . 3. But if an engineers decides that the subfloor is too thin for the OC of the floor joists, they ask for paint on glue long screws into joist and short screws to pull the two together. Ideally, I would tear out the existing finish flooring, screw down the existing plank subfloor where loose, repair the plank subfloor where needed and then lay my new flooring (engineered hardwood) right over the existing plank subfloor. SHARES. If you're determined to do it from the 2nd story there are several ways to do it. joists are currently covered with a 5/8" plywood subfloor. • Floating subfloor: There are two common methods for this. If the plywood subfloor you’re placing is 5/8 of an inch thick, you need a screw about 1 5/8 inches long. The other half are parallel with the joists, so provide very little strength. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. Thanks, I've researched this a lot - plenty of companies recommend using plywood as long as it is dampened by Green Glue. If you have a concrete slab floor, the slab may be considered the subfloor. This means that it can resist the elements for a long time. The subfloor is the bottom layer that rests on the joists. Use construction glue to glue 1/2 plywood to wooden boards first (to eliminate all squeaks and create monolithic rigid surface) and then use green glue and another layer of 1/2 plywood. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. This evolved plywood may claim an overall advantage over OSB, since plywood is a stiffer, longer-lasting subfloor option. Acknowledging that some builders are going to be loyal to plywood, Georgia-Pacific went national with a line of enhanced plywood, called Plytanium DryPly (view on The Home Depot). Using green joists. 2. I'm guessing H Clips aren't used for flooring? If you truly want to add another layer of subfloor to the existing layer, you will only need to add another layer of 3/8" plywood, or OSB, (I am not a big fan of OSB) glued and screwed. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top. Press question mark to learn the rest of the keyboard shortcuts, http://www.supressproducts.com/products/plywood.htm. Though building codes treat both materials equally as “structural panels,” plywood and oriented strand board (OSB) are quite different compositionally. one thicker than the other? Although this is not a guarantee that there is mold present, it is an indication of a potential problem area that requires further inspection. OSB, on the other hand, consists of 3-inch to 4-inch strands of wood that are also layered and configured in a crossing pattern, then glued and pressed. Plywood is made by gluing alternating layers of wood veneer. This unfor tunately does not guarantee that the timber used within the construction of the plywood is top quality, but it should ensure that the laminated layers are well bonded. The 16" o.c. You can use a soundproof plywood, designed for this purpose. joists are currently covered with a 5/8" plywood subfloor. Squeaks happen mostly when a nail or screw just runs down beside a joist. OSB. 7 Jan 2020 . If the number of plies/layers is more, the plywood will be stronger and the production costs will be higher . flooring paper, and your oak flooring. How many layers of plywood do you need for a subfloor? Level. Well, each has their own strengths and weaknesses when used as exposed decking or subflooring. ._2cHgYGbfV9EZMSThqLt2tx{margin-bottom:16px;border-radius:4px}._3Q7WCNdCi77r0_CKPoDSFY{width:75%;height:24px}._2wgLWvNKnhoJX3DUVT_3F-,._3Q7WCNdCi77r0_CKPoDSFY{background:var(--newCommunityTheme-field);background-size:200%;margin-bottom:16px;border-radius:4px}._2wgLWvNKnhoJX3DUVT_3F-{width:100%;height:46px} The second method is to loose-lay one layer of 3/4 -inch plywood cut into 16-inch planks perpendicularly or diagonally to the direction of the flooring. Meanwhile, OSB compacts as many as 50 layers of strands into a single sheet the same thickness as that plywood, ensuring a much denser—and heavier—product throughout. Plywood is made from thin layers or ‘plies’ of wood veneer glued together so that the grain in each ply is at right angles to the next ply. Plywood is made by gluing alternating layers of wood veneer. By combatting moisture issues, this new generation of plywood aims to go head-to-head with the enhanced OSB products. I'm sure soundproof plywood would be better, but cost prohibitive (not only more expensive per board but also would have to have 15-30 sheets (depending on whether I'm doing one or two layers) shipped to my house since the local stores don't carry them - don't want to imagine shipping costs for 900 - 2000 pounds of 4x8 plywood. “Wood and water just do not mix well,” says Jeff Key, marketing manager for wood products at Georgia-Pacific. These problems are, more often than not, caused by water or water vapor. DryPly is plywood treated with a water-resistant coating that prevents 40 percent of the absorption that occurs when uncoated plywood gets wet. Is it better to nail or screw down subfloor? The subfloor is structural, second only to joists to create the flooring of the home. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Once the components of the epoxy meet, they tend to dry and harden quickly to create a protective layer on the surface of the plywood. I got an estimate from the local flooring company on Saturday and talked to him about how it could cause problems. A place where people can come to learn and share their experiences of doing, building and fixing things on their own. To address these water issues, OSB and plywood manufacturers are refining their products. Its affordable price aided its growing popularity, and it soon surpassed plywood as builders’ choice in home construction—floors as well as wall and roof sheathing. Subfloor — A subfloor is selected for structural purposes and is the substrate (supporting layer) for the underlayment. Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap. Copyright © 2020 Acton Media Inc. All rights reserved. It looks like the cabinets were installed directly on top of the plywood subfloor, and then there was another layer of plywood added below the laminate. Medium density fiberboard (MDF) is composed of small wood fibers compressed with glue. This conclusion is correct only under defined conditions. 31 views Sponsored by Credit Secrets Her credit score went from 588 to 781 with this 5 minute trick. Example: http://www.supressproducts.com/products/plywood.htm. If existing subfloor is 3/4 " t@g boards- screw 2 or 3 1-3/4 screws into every plank , every joist prior installing 3/4" t@g real plywood. I'm adding layers to my second story floor - currently there's a single layer of plywood subfloor so I plan on adding two more layers of 3/4 inch plywood with green glue between each layer. • Single-layer wood subfloors increase the potential for staining from the panel components, coated nails, construction adhesives, spills, overspray and show-through from texture and mechanical or water damage when resilient floors are installed directly to single-layer STURD-I-FLOOR. ._9ZuQyDXhFth1qKJF4KNm8{padding:12px 12px 40px}._2iNJX36LR2tMHx_unzEkVM,._1JmnMJclrTwTPpAip5U_Hm{font-size:16px;font-weight:500;line-height:20px;color:var(--newCommunityTheme-bodyText);margin-bottom:40px;padding-top:4px}._306gA2lxjCHX44ssikUp3O{margin-bottom:32px}._1Omf6afKRpv3RKNCWjIyJ4{font-size:18px;font-weight:500;line-height:22px;border-bottom:2px solid var(--newCommunityTheme-line);color:var(--newCommunityTheme-bodyText);margin-bottom:8px;padding-bottom:8px}._2Ss7VGMX-UPKt9NhFRtgTz{margin-bottom:24px}._3vWu4F9B4X4Yc-Gm86-FMP{border-bottom:1px solid var(--newCommunityTheme-line);margin-bottom:8px;padding-bottom:2px}._3vWu4F9B4X4Yc-Gm86-FMP:last-of-type{border-bottom-width:0}._2qAEe8HGjtHsuKsHqNCa9u{font-size:14px;font-weight:500;line-height:18px;color:var(--newCommunityTheme-bodyText);padding-bottom:8px;padding-top:8px}.c5RWd-O3CYE-XSLdTyjtI{padding:8px 0}._3whORKuQps-WQpSceAyHuF{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px}._1Qk-ka6_CJz1fU3OUfeznu{margin-bottom:8px}._3ds8Wk2l32hr3hLddQshhG{font-weight:500}._1h0r6vtgOzgWtu-GNBO6Yb,._3ds8Wk2l32hr3hLddQshhG{font-size:12px;line-height:16px;color:var(--newCommunityTheme-actionIcon)}._1h0r6vtgOzgWtu-GNBO6Yb{font-weight:400}.horIoLCod23xkzt7MmTpC{font-size:12px;font-weight:400;line-height:16px;color:#ea0027}._33Iw1wpNZ-uhC05tWsB9xi{margin-top:24px}._2M7LQbQxH40ingJ9h9RslL{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px} The kitchen has multiple layers or wooden subfloor (at least 3, but it might be 4 or 5). 2. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. Expert advice from Bob Vila, the most trusted name in home improvement, home remodeling, home repair, and DIY. How To Add An Extra Layer of Plywood Over a Subfloor. The standard size sheet is 8ft x 4ft (or the metric equivalent 1.2m x 2.4m) and ranges in thicknesses from 1.4mm to 4.3mm. ._3Qx5bBCG_O8wVZee9J-KyJ{border-top:1px solid var(--newRedditTheme-line);margin-top:16px;padding-top:16px}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN{margin:0;padding:0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between;margin:8px 0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ.QgBK4ECuqpeR2umRjYcP2{opacity:.4}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label{font-size:12px;font-weight:500;line-height:16px;display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label svg{fill:currentColor;height:20px;margin-right:4px;width:20px}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between;padding:0;width:100%}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_ svg{display:inline-block;height:12px;width:12px}.isInButtons2020 ._4OtOUaGIjjp2cNJMUxme_{padding:0 12px}.isInButtons2020 ._1ra1vBLrjtHjhYDZ_gOy8F{font-family:Noto Sans,Arial,sans-serif;font-size:12px;font-weight:700;letter-spacing:unset;line-height:16px;text-transform:unset}._1ra1vBLrjtHjhYDZ_gOy8F{--textColor:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColorShaded80);font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;color:var(--textColor);fill:var(--textColor);opacity:1}._1ra1vBLrjtHjhYDZ_gOy8F._2UlgIO1LIFVpT30ItAtPfb{--textColor:var(--newRedditTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newRedditTheme-widgetColors-sidebarWidgetTextColorShaded80)}._1ra1vBLrjtHjhYDZ_gOy8F:active,._1ra1vBLrjtHjhYDZ_gOy8F:hover{color:var(--textColorHover);fill:var(--textColorHover)}._1ra1vBLrjtHjhYDZ_gOy8F:disabled,._1ra1vBLrjtHjhYDZ_gOy8F[data-disabled],._1ra1vBLrjtHjhYDZ_gOy8F[disabled]{opacity:.5;cursor:not-allowed} I am taking up carpet & particle board and putting a new layer of 1/2" plywood underlayment over the plywood subfloor prior to installing 3/4" hardwood (nailed down). Circular saw. and then … Posted by 3 hours ago. The more layers, the thicker & stronger the plywood. However, tongue & groove plywood subfloor has an advantage over regular square edge plywood. According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. The alternating layers make plywood a good strong sheet material for almost any project whether its furniture making or subfloor applications. 3. When plywood was developed to replace solid-board sheathing for subfloors and decking, builders were generally reluctant to switch to the new product, which ultimately became the standard for subfloor applications. “Our product comes with a 100 percent builder satisfaction guarantee against delamination, edge swelling, and joint sanding,” says Key. His solution is to remove 1-2 layers of the subfloor before putting down the vinyl. ._1PeZajQI0Wm8P3B45yshR{fill:var(--newCommunityTheme-actionIcon)}._1PeZajQI0Wm8P3B45yshR._3axV0unm-cpsxoKWYwKh2x{fill:#ea0027} Oriented strand board (OSB) is comprised of up to 50 layers of 3- to 6-inch inch wood strands oriented crosswise to each other, then glued under pressure. The number of ply will affect the production costs and plywood quality. • Glue-down subfloor: 5/8 -inch plywood panels are glued in a staggered joint pattern directly to the slab. To avoid buckling, subfloor panels should be spaced with a 1/8-inch gap at all edges and ends to provide room for naturally occurring expansion. Wd it be unusual to have our framer put down two layers of plywood over the joists (one ¾" and one ½"); that way, the ½" layer can be removed at exterior thresholds to get doors to fit with finished flooring a lot better? or thicker layer of APA plywood underlayment. Engineered or Solid Wood Flooring that is less than 1/2" thick can be installed over a ._2a172ppKObqWfRHr8eWBKV{-ms-flex-negative:0;flex-shrink:0;margin-right:8px}._39-woRduNuowN7G4JTW4I8{border-top:1px solid var(--newCommunityTheme-widgetColors-lineColor);margin-top:12px;padding-top:12px}._3AOoBdXa2QKVKqIEmG7Vkb{font-size:12px;font-weight:400;line-height:16px;-ms-flex-align:center;align-items:center;background-color:var(--newCommunityTheme-body);border-radius:4px;display:-ms-flexbox;display:flex;-ms-flex-direction:row;flex-direction:row;margin-top:12px}.vzEDg-tM8ZDpEfJnbaJuU{color:var(--newCommunityTheme-button);fill:var(--newCommunityTheme-button);height:14px;width:14px}.r51dfG6q3N-4exmkjHQg_{font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between}._2ygXHcy_x6RG74BMk0UKkN{margin-left:8px}._2BnLYNBALzjH6p_ollJ-RF{display:-ms-flexbox;display:flex;margin-left:auto}._1-25VxiIsZFVU88qFh-T8p{padding:0}._3BmRwhm18nr4GmDhkoSgtb{color:var(--newCommunityTheme-bodyText);-ms-flex:0 0 auto;flex:0 0 auto;line-height:16px} Although a home's floor is usually thought to be simply the surface layer of visible floor covering, a floor is actually a system of layered components, each of which is essential to the function and durability of the floor. This means that only half of the layers of the plywood are in the right direction for maximum strength, i.e. Fasten your first layer plywood subfloor as you normally should. “It is made for long-term durability.” This sentiment is backed by Georgia-Pacific’s lifetime warranty on the product. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. hi! A subfloor is a wooden, structural substrate to which durable finished flooring is attached. “The difference with plywood is not felt initially during the first walk-through by the owners,” says Key. Carpets get padding to add to the life. OSB commonly used in framing to sheath roofs, floors, and walls. A single layer of 3/4" thick plywood on proper 16" spaced floor joists should be sufficient. Hi Jack, It depend on the particular floor leveling product you’re using, but most manufacturers recommend that you apply no more than 1/8” thick coat of self-leveling or floor patch compound at a time. Also, what is the best/easiest/quickest way to maintain the 1/8" gap between sheets? Bottom line is that even cheap, fast grown softwood T&G planks will give you a more solid subfloor than a really expensive plywood. This is desirable for structural panels because finish plywood can be extremely expensive. ._1x9diBHPBP-hL1JiwUwJ5J{font-size:14px;font-weight:500;line-height:18px;color:#ff585b;padding-left:3px;padding-right:24px}._2B0OHMLKb9TXNdd9g5Ere-,._1xKxnscCn2PjBiXhorZef4{height:16px;padding-right:4px;vertical-align:top}._1LLqoNXrOsaIkMtOuTBmO5{height:20px;padding-right:8px;vertical-align:bottom}.QB2Yrr8uihZVRhvwrKuMS{height:18px;padding-right:8px;vertical-align:top}._3w_KK8BUvCMkCPWZVsZQn0{font-size:14px;font-weight:500;line-height:18px;color:var(--newCommunityTheme-actionIcon)}._3w_KK8BUvCMkCPWZVsZQn0 ._1LLqoNXrOsaIkMtOuTBmO5,._3w_KK8BUvCMkCPWZVsZQn0 ._2B0OHMLKb9TXNdd9g5Ere-,._3w_KK8BUvCMkCPWZVsZQn0 ._1xKxnscCn2PjBiXhorZef4,._3w_KK8BUvCMkCPWZVsZQn0 .QB2Yrr8uihZVRhvwrKuMS{fill:var(--newCommunityTheme-actionIcon)} There are many types, sizes and configurations of plywood. If just overboarding then a minimum 6mm thickness is required. Plywood is a material manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. This provides dimensional stability and improves the strength of the board. I'm adding layers to my second story floor - currently there's a single layer of plywood subfloor so I plan on adding two more layers of 3/4 inch plywood with green glue between each layer. A tile floor consists of three individual layers: the subfloor, the underlayment, and the surface tile you walk on. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. Plywood is made from glued thin strips of wood veneer (called plies) that are layered at alternating 90-degree angles and placed in a hot press; the resulting cross-laminated and layered material is structurally enhanced and resistant to the expansion and contraction that affects solid wood. 2. Whether you are laying the laminate below ground level or at ground level or above, you need to have the correct type and number of layers for the underlayment. Using a water-resistant subfloor product saves the builder time and money because they make compromised deck sections a thing of the past. .LalRrQILNjt65y-p-QlWH{fill:var(--newRedditTheme-actionIcon);height:18px;width:18px}.LalRrQILNjt65y-p-QlWH rect{stroke:var(--newRedditTheme-metaText)}._3J2-xIxxxP9ISzeLWCOUVc{height:18px}.FyLpt0kIWG1bTDWZ8HIL1{margin-top:4px}._2ntJEAiwKXBGvxrJiqxx_2,._1SqBC7PQ5dMOdF0MhPIkA8{height:24px;vertical-align:middle;width:24px}._1SqBC7PQ5dMOdF0MhPIkA8{-ms-flex-align:center;align-items:center;display:-ms-inline-flexbox;display:inline-flex;-ms-flex-direction:row;flex-direction:row;-ms-flex-pack:center;justify-content:center} Bob talks with carpenter Bob Ryley and general contractor Kevin Kalman, as they lay down the subflooring. To avoid buckling, subfloor panels should be spaced with a 1/8-inch gap at all edges and ends to provide room for naturally occurring expansion. Use green glue between the wooden boards and 1/2 plywood (and possibly risk some remaining squeaks?) Do I still need to do the standard spacing - 6 inches around the perimeter and 8 in in the field? “I use the AdvanTech sheets so I don’t have to worry about sanding the edges later,” says James Langeway, a Vermont contractor. Otherwise I would go directly over the existing 1/2" subfloor with the flooring paper and oak floor. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). ._3-SW6hQX6gXK9G4FM74obr{display:inline-block;vertical-align:text-bottom;width:16px;height:16px;font-size:16px;line-height:16px} CDX plywood is traditional wood plywood made from thin layers of lumber, known as veneers. While most floor tile these days is installed onto a layer of cement board or similar backerboard, it is possible to lay tile directly over plywood. Snap chalk lines in 8"×8" grid and screw everywhere they intersect. 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._1cDoUuVvel5B1n5wa3K507{-ms-flex-pack:center;justify-content:center;margin-top:12px;width:100%}._2_w8DCFR-DCxgxlP1SGNq5{margin-right:4px;vertical-align:middle}._1aS-wQ7rpbcxKT0d5kjrbh{border-radius:4px;display:inline-block;padding:4px}._2cn386lOe1A_DTmBUA-qSM{border-top:1px solid var(--newCommunityTheme-widgetColors-lineColor);margin-top:10px}._2Zdkj7cQEO3zSGHGK2XnZv{display:inline-block}.wzFxUZxKK8HkWiEhs0tyE{font-size:12px;font-weight:700;line-height:16px;color:var(--newCommunityTheme-button);cursor:pointer;text-align:left;margin-top:2px}._3R24jLERJTaoRbM_vYd9v0._3R24jLERJTaoRbM_vYd9v0._3R24jLERJTaoRbM_vYd9v0{display:none}._38lwnrIpIyqxDfAF1iwhcV{background-color:var(--newRedditTheme-line);border:none;height:1px;margin:16px 0}.yobE-ux_T1smVDcFMMKFv{font-size:16px;font-weight:500;line-height:20px}._2DVpJZAGplELzFy4mB0epQ{margin-top:8px}._2DVpJZAGplELzFy4mB0epQ .x1f6lYW8eQcUFu0VIPZzb{color:inherit}._2DVpJZAGplELzFy4mB0epQ svg.LTiNLdCS1ZPRx9wBlY2rD{fill:inherit;padding-right:8px}._2DVpJZAGplELzFy4mB0epQ ._18e78ihYD3tNypPhtYISq3{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:18px;color:inherit} Concrete is a more common subfloor in basements, and sometimes on the first floor of residential homes that don’t have basements (we’re looking at you, California). The number of ply will affect the production costs and plywood quality. Or if existing planks are in good condition- install hardwood floor on top of it, plywood is nor really needed, it will raise your floor too. It will also hold up better under flooring accidents like leaks or flooding, and has greater nail withdrawal strength to hold the nail in under stress. Plywood is made up of several layers of wood veneer glued together with adjacent layers that form a composite substance. IF the two layer approach is ok, should they be the same thickness? perpendicular to the joists. This unfor tunately does not guarantee that the timber used within the construction of the plywood is top quality, but it should ensure that the laminated layers are well bonded. By Bob Vila. Plywood is commonly composed of 3 or 5 layers. ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} I'm guessing these are what you mean? The smaller fibers … Should underlayment be screwed to joists? we are planning to install a 1/2"-3/4" solid hardwood floor, and are trying to determine to correct way to do this with our existing 1/2" subfloor. Plywood Tips. Laminate Flooring on Two Layers of Plywood Subfloor? Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Box of 1-1/4-inch drywall screws. The tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor. The panels should be staggered every 2 feet and spaced 1/8 inch between ends. Why on earth are you adding two more layers to your floor ?! I know I'm going to be screwing each additional layer into the layer below it, not into the joists, using one and a quarter inch screws so that I don't penetrate all the way through the layer below. What are the advantages to using Backer-On screws as opposed to what i picked up already (which of course I can return): http://www.homedepot.com/p/Grip-Rite-1-1-4-in-Construction-Screw-114GCS1/204982239. There are different reasons why people decide installing new plywood, from replacing a bad sub-floor, to raising it to be higher & stronger. I plan to adhere, with thinset, another 5/8" or 3/4" layer of plywood along with a waterproofing membrane. 16" (406 mm) o.c. Since a plywood sheet is composed of many large wood veneers, it is susceptible to loops, and other imperfections (That can create slightly softer spots, if aligned). The subfloor is the bottom-most layer and it rests on the joists. Some floors, like concrete do not require joists. Poplar or Birch Plywood with a fully sanded face and exterior glue. ._3bX7W3J0lU78fp7cayvNxx{max-width:208px;text-align:center} Two sawhorses. Tips for Laying Tile on Plywood Subfloor - The Spruce . The "X" indicates that the plywood can withstand some exposure. .Rd5g7JmL4Fdk-aZi1-U_V{transition:all .1s linear 0s}._2TMXtA984ePtHXMkOpHNQm{font-size:16px;font-weight:500;line-height:20px;margin-bottom:4px}.CneW1mCG4WJXxJbZl5tzH{border-top:1px solid var(--newRedditTheme-line);margin-top:16px;padding-top:16px}._11ARF4IQO4h3HeKPpPg0xb{transition:all .1s linear 0s;display:none;fill:var(--newCommunityTheme-button);height:16px;width:16px;vertical-align:middle;margin-bottom:2px;margin-left:4px;cursor:pointer}._1I3N-uBrbZH-ywcmCnwv_B:hover ._11ARF4IQO4h3HeKPpPg0xb{display:inline-block}._33CSUrVoafEXJUDX3qOQtf{height:12px;width:12px;margin-bottom:2px;margin-right:4px;vertical-align:middle;fill:var(--newRedditTheme-metaText)}._2IvhQwkgv_7K0Q3R0695Cs{border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._2IvhQwkgv_7K0Q3R0695Cs:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B{transition:all .1s linear 0s;border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._1I3N-uBrbZH-ywcmCnwv_B:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B.IeceazVNz_gGZfKXub0ak,._1I3N-uBrbZH-ywcmCnwv_B:hover{border:1px solid var(--newCommunityTheme-button)}._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk{margin-top:25px;left:-9px}._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:focus-within,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:hover{transition:all .1s linear 0s;border:none;padding:8px 8px 0}._25yWxLGH4C6j26OKFx8kD5{display:inline}._1i46tE0yFLStZBdRfHnYIa{-ms-flex-align:center;align-items:center;margin-top:4px;margin-bottom:8px}._2YsVWIEj0doZMxreeY6iDG,._1i46tE0yFLStZBdRfHnYIa{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-metaText);display:-ms-flexbox;display:flex}._2YsVWIEj0doZMxreeY6iDG{padding:4px 6px}._1hFCAcL4_gkyWN0KM96zgg{color:var(--newCommunityTheme-button);margin-right:8px;margin-left:auto;color:var(--newCommunityTheme-errorText)}._1hFCAcL4_gkyWN0KM96zgg,._1dF0IdghIrnqkJiUxfswxd{font-size:12px;font-weight:700;line-height:16px;cursor:pointer;-ms-flex-item-align:end;align-self:flex-end;-webkit-user-select:none;-ms-user-select:none;user-select:none}._1dF0IdghIrnqkJiUxfswxd{color:var(--newCommunityTheme-button)}._3VGrhUu842I3acqBMCoSAq{font-weight:700;color:#ff4500;text-transform:uppercase;margin-right:4px}._3VGrhUu842I3acqBMCoSAq,.edyFgPHILhf5OLH2vk-tk{font-size:12px;line-height:16px}.edyFgPHILhf5OLH2vk-tk{font-weight:400;-ms-flex-preferred-size:100%;flex-basis:100%;margin-bottom:4px;color:var(--newCommunityTheme-metaText)}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX{margin-top:6px}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._3MAHaXXXXi9Xrmc_oMPTdP{margin-top:4px} Enough 1/2- or 5/8-inch thick 8 by 4-foot sheets of plywood to cover the floor. in Home Improvement. Oriented strand board (OSB) is composed of wood strands or flakes compressed with glue. I know I'm going to be screwing each additional layer into the layer below it, not into the joists, using one and a quarter inch screws so that I don't penetrate all the way through the layer below. I just started a kitchen demo today, and once the old cabinets were out I got to take a look at the subfloor. Meanwhile, OSB compacts as many as 50 layers of strands into a single sheet the same thickness as that plywood, ensuring a much denser—and heavier—product throughout. Are you saying it is eventually an adhesive, but not til it fully dries (which takes days/weeks), New comments cannot be posted and votes cannot be cast. If existing subfloor is 3/4 " t@g boards- screw 2 or 3 1-3/4 screws into every plank , every joist prior installing 3/4" t@g real plywood. lay tile on plywood? Plywood is made by gluing alternating layers of wood veneer. Close. Huber even offers a 50-year warranty on AdvanTech. Learn if you can lay tile on plywood or on subfloor and tips for how to make this a success. So, unsurprisingly, when OSB came on the scene as an alternative to plywood, detractors were quick to point out its deficiencies. ._33axOHPa8DzNnTmwzen-wO{font-size:14px;font-weight:700;letter-spacing:.5px;line-height:32px;text-transform:uppercase;display:block;padding:0 16px;width:100%} Plywood is usually used as subfloor today. Subfloor The subfloor is the flat surface on which all other layers rest. Products like AdvanTech, an OSB product by Huber Engineered Woods, were brought onto the scene to meet the need for moisture-resistant OSB (view on Lowe’s). joist spacing, single layer OSB or plywood subfloor DH-W19-T-16 DH-W16-T-16 Ceramic or porcelain tile Unmodified thin-set mortar DITRA-HEAT or DITRA-HEAT-TB uncoupling membrane and heating cables Latex p.c. Different plywoods use various materials and methods of manufacture, depending on the application for which they're intended. Lay the first 8 by 4 plywood sheet, top side down, along the wall in one corner, so two sides of it are bordered by wall. He's been doing this for 40 years, so I assumed that this was a common issue. Sleeper-constructed subfloor — Consists of wood subfloor installed over or on an existing concrete subfloor on- or below-grade without 18" of well-ventilated air space. CDX plywoodTraditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. . MDF. . Plywood comes in a variety of thicknesses, beginning at 1/8 inch and increasing to 1 inch. Plywood as a Subfloor Material. If you are looking for it to be squeak free. The underlayment for laminate floors is a material that provides a sound barrier or protects the laminate from moisture, depending on the type of underlayment you use. joist spacing, single layer OSB or plywood subfloor Floors, Interior - Ceramic or Porcelain Tile 19.2" (488 mm) o.c. Looks like you're using new Reddit on an old browser. Individual pieces of plywood buckle, twist and sometimes bubble or delaminate. Glue is sprayed between each layer and the sheet is hot pressed. So all the screws are really doing is clamping it until the glue sets. However, many subfloors might not be the ideal surface on which to lay your finished floors. Thanks - I thought Green Glue actually doesn't function as a glue, though - they make a point of saying that it is not an adhesive. “There really isn’t another plywood product out there like it,” adds Key. It is not a pretty sight. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. Plywood is the most common type of subflooring. Written by Stacy Randall. 1. Bob Vila, 11 Decorative Pillow Trends to Expect in 2021, 8 Easy and Affordable Garage Floor Options, The 7 Best Low-Cost Alternatives to Hardwood Flooring, 6 Ways You Can Get a Better Backyard in Just One Weekend, The Most Affordable Ways to Fence in a Yard. Share Tweet. It’s constructed from wood veneer sheets that are glued together. Meanwhile, Advantech compacts the same thickness as the plywood to as many as 50 layers of beams forming one sheet, producing a more compact and weighted product throughout. However, many subfloors might not be the ideal surface on which to lay your finished floors. You’ll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it. Two plywood layers would span 24 inches in most cases, but if you want to get by with one layer, spacing the joists at 16 inch centers will give you a better floor. As plywood and OSB wood products absorb moisture, their layers can separate or warp. .s5ap8yh1b4ZfwxvHizW3f{color:var(--newCommunityTheme-metaText);padding-top:5px}.s5ap8yh1b4ZfwxvHizW3f._19JhaP1slDQqu2XgT3vVS0{color:#ea0027} Disclosure: BobVila.com participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for publishers to earn fees by linking to Amazon.com and affiliated sites. Pay extra attention to the seams. As one explained it, You now have one big sheet of plywood the size of the room 1 1/4" thick. How thick a layer of self-leveling floor compound can you pour on a subfloor to level it?-Jack. Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap. Depending on finished flooring you could use a sound barrier subfloor, like an "acoustic mat" underneath your floor. ._3Im6OD67aKo33nql4FpSp_{border:1px solid var(--newCommunityTheme-widgetColors-sidebarWidgetBorderColor);border-radius:5px 5px 4px 4px;overflow:visible;word-wrap:break-word;background-color:var(--newCommunityTheme-body);padding:12px}.lnK0-OzG7nLFydTWuXGcY{font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;padding-bottom:4px;color:var(--newCommunityTheme-navIcon)} Also use hardy backer screws. Your floors consist of layers, similar to how you would make a sandwich. .FIYolDqalszTnjjNfThfT{max-width:256px;white-space:normal;text-align:center} 2. Oriented strand board (OSB) is comprised of up to 50 layers of 3- to 6-inch inch wood strands oriented crosswise to each other, then glued under pressure. So if your subfloor is 3/4 of an inch thick, any screw about 1 3/4 inches long will do the trick. Plywood is rigid and is better at transferring sound - it would not be a wise choice for soundproofing your floor. Many people have seen plywood swell. Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. .c_dVyWK3BXRxSN3ULLJ_t{border-radius:4px 4px 0 0;height:34px;left:0;position:absolute;right:0;top:0}._1OQL3FCA9BfgI57ghHHgV3{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;-ms-flex-pack:start;justify-content:flex-start;margin-top:32px}._1OQL3FCA9BfgI57ghHHgV3 ._33jgwegeMTJ-FJaaHMeOjV{border-radius:9001px;height:32px;width:32px}._1OQL3FCA9BfgI57ghHHgV3 ._1wQQNkVR4qNpQCzA19X4B6{height:16px;margin-left:8px;width:200px}._39IvqNe6cqNVXcMFxFWFxx{display:-ms-flexbox;display:flex;margin:12px 0}._39IvqNe6cqNVXcMFxFWFxx ._29TSdL_ZMpyzfQ_bfdcBSc{-ms-flex:1;flex:1}._39IvqNe6cqNVXcMFxFWFxx .JEV9fXVlt_7DgH-zLepBH{height:18px;width:50px}._39IvqNe6cqNVXcMFxFWFxx ._3YCOmnWpGeRBW_Psd5WMPR{height:12px;margin-top:4px;width:60px}._2iO5zt81CSiYhWRF9WylyN{height:18px;margin-bottom:4px}._2iO5zt81CSiYhWRF9WylyN._2E9u5XvlGwlpnzki78vasG{width:230px}._2iO5zt81CSiYhWRF9WylyN.fDElwzn43eJToKzSCkejE{width:100%}._2iO5zt81CSiYhWRF9WylyN._2kNB7LAYYqYdyS85f8pqfi{width:250px}._2iO5zt81CSiYhWRF9WylyN._1XmngqAPKZO_1lDBwcQrR7{width:120px}._3XbVvl-zJDbcDeEdSgxV4_{border-radius:4px;height:32px;margin-top:16px;width:100%}._2hgXdc8jVQaXYAXvnqEyED{animation:_3XkHjK4wMgxtjzC1TvoXrb 1.5s ease infinite;background:linear-gradient(90deg,var(--newCommunityTheme-field),var(--newCommunityTheme-inactive),var(--newCommunityTheme-field));background-size:200%}._1KWSZXqSM_BLhBzkPyJFGR{background-color:var(--newCommunityTheme-widgetColors-sidebarWidgetBackgroundColor);border-radius:4px;padding:12px;position:relative;width:auto} But if you have a weak subfloor that flexes up and down when walked on I would recommend adding an additional layer of 3/8" or 1/2" thick plywood underlayment, glued and screwed down over the weaker subfloor will add stability. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. Plywood consist of some veneer plies or layers . Power drill with screwdriver bit. I think the green glue if applied correctly will give a good bond (should be better than liquid nails if you apply it like you should be for soundproofing). I would say 20 per sheet would be sufficient?? ._1EPynDYoibfs7nDggdH7Gq{margin-bottom:8px;position:relative}._1EPynDYoibfs7nDggdH7Gq._3-0c12FCnHoLz34dQVveax{max-height:63px;overflow:hidden}._1zPvgKHteTOub9dKkvrOl4{font-family:Noto Sans,Arial,sans-serif;font-size:14px;line-height:21px;font-weight:400;word-wrap:break-word}._1dp4_svQVkkuV143AIEKsf{-ms-flex-align:baseline;align-items:baseline;background-color:var(--newCommunityTheme-body);bottom:-2px;display:-ms-flexbox;display:flex;-ms-flex-flow:row nowrap;flex-flow:row nowrap;padding-left:2px;position:absolute;right:-8px}._5VBcBVybCfosCzMJlXzC3{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;color:var(--newCommunityTheme-bodyText)}._3YNtuKT-Is6XUBvdluRTyI{color:var(--newCommunityTheme-metaText);fill:var(--newCommunityTheme-metaText);border:0;padding:0 8px}._3YNtuKT-Is6XUBvdluRTyI:active,._3YNtuKT-Is6XUBvdluRTyI:hover{color:var(--newCommunityTheme-metaTextShaded80);fill:var(--newCommunityTheme-metaTextShaded80)}._3YNtuKT-Is6XUBvdluRTyI:disabled,._3YNtuKT-Is6XUBvdluRTyI[data-disabled],._3YNtuKT-Is6XUBvdluRTyI[disabled]{color:var(--newCommunityTheme-metaTextAlpha50);cursor:not-allowed;fill:var(--newCommunityTheme-metaTextAlpha50)}._2ZTVnRPqdyKo1dA7Q7i4EL{transition:all .1s linear 0s}.k51Bu_pyEfHQF6AAhaKfS{transition:none}._2qi_L6gKnhyJ0ZxPmwbDFK{transition:all .1s linear 0s;display:block;background-color:var(--newCommunityTheme-field);border-radius:4px;padding:8px;margin-bottom:12px;margin-top:8px;border:1px solid var(--newCommunityTheme-canvas);cursor:pointer}._2qi_L6gKnhyJ0ZxPmwbDFK:focus{outline:none}._2qi_L6gKnhyJ0ZxPmwbDFK:hover{border:1px solid var(--newCommunityTheme-button)}._2qi_L6gKnhyJ0ZxPmwbDFK._3GG6tRGPPJiejLqt2AZfh4{transition:none;border:1px solid var(--newCommunityTheme-button)}.IzSmZckfdQu5YP9qCsdWO{cursor:pointer;transition:all .1s linear 0s}.IzSmZckfdQu5YP9qCsdWO ._1EPynDYoibfs7nDggdH7Gq{border:1px solid transparent;border-radius:4px;transition:all .1s linear 0s}.IzSmZckfdQu5YP9qCsdWO:hover ._1EPynDYoibfs7nDggdH7Gq{border:1px solid var(--newCommunityTheme-button);padding:4px}._1YvJWALkJ8iKZxUU53TeNO{font-size:12px;font-weight:700;line-height:16px;color:var(--newCommunityTheme-button)}._3adDzm8E3q64yWtEcs5XU7{display:-ms-flexbox;display:flex}._3adDzm8E3q64yWtEcs5XU7 ._3jyKpErOrdUDMh0RFq5V6f{-ms-flex:100%;flex:100%}._3adDzm8E3q64yWtEcs5XU7 .dqhlvajEe-qyxij0jNsi0{color:var(--newCommunityTheme-button)}._3adDzm8E3q64yWtEcs5XU7 ._12nHw-MGuz_r1dQx5YPM2v,._3adDzm8E3q64yWtEcs5XU7 .dqhlvajEe-qyxij0jNsi0{font-size:12px;font-weight:700;line-height:16px;cursor:pointer;-ms-flex-item-align:end;align-self:flex-end;-webkit-user-select:none;-ms-user-select:none;user-select:none}._3adDzm8E3q64yWtEcs5XU7 ._12nHw-MGuz_r1dQx5YPM2v{color:var(--newCommunityTheme-button);margin-right:8px;color:var(--newCommunityTheme-errorText)}._3zTJ9t4vNwm1NrIaZ35NS6{font-family:Noto Sans,Arial,sans-serif;font-size:14px;line-height:21px;font-weight:400;word-wrap:break-word;width:100%;padding:0;border:none;background-color:transparent;resize:none;outline:none;cursor:pointer;color:var(--newRedditTheme-bodyText)}._2JIiUcAdp9rIhjEbIjcuQ-{resize:none;cursor:auto}._2I2LpaEhGCzQ9inJMwliNO{display:inline-block}._2I2LpaEhGCzQ9inJMwliNO,._42Nh7O6pFcqnA6OZd3bOK{margin-left:4px;vertical-align:middle}._42Nh7O6pFcqnA6OZd3bOK{fill:var(--newCommunityTheme-button);height:16px;width:16px;margin-bottom:2px} According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. Your subfloor provides an excellent, level foundation for the flooring of your home. 1. Thank you! http://www.homedepot.com/p/Backer-On-9-x-1-1-4-in-Serrated-Head-Star-Drive-Cement-Board-Screws-750-Pack-23406/300661899. Laminate Flooring on Two Layers of Plywood Subfloor? /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/IdCard.8fe90067a922ef36d4b6.css.map*/For sound proofing? Structural Plywood - it is made of three or more thin layers of wood bonded together with adhesive and compressed under high pressure. The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. There are several types of plywood that are well-suited for subfloors. 1. There are many reasons for adding underlayment: ... Plywood is the most common type of subfloor. Installing thinner wood flooring over an already weak or thin subfloor may cause the whole floor system to flex up and down when walked on. Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. I just started a kitchen demo today, and once the old cabinets were out I got to take a look at the subfloor. Subfloor – the structurally sound layer, usually plywood. Essentially an enhanced OSB material, AdvanTech uses a resin integrated with the wood to resist water absorption and reduce the swelling that plagued the original OSB subflooring. When this swelling takes place after the plywood is installed, flooring, roofing, and or siding products can begin to look less than perfect. Walk-Through by the owners, ” says Key that the plywood subfloor as you normally should Tile ( 81. Media Inc. all rights reserved entire floor: 5/8 -inch plywood panels are glued a... And oak floor 3/8-inch plywood over a subfloor is the better option, plywood vs. OSB or screw subfloor... Beginning at 1/8 inch between ends groove plywood subfloor, single layer of 3/4 '' thick thinset, another ''! And walls solution is to use water-repellent or water-resistant products in how many layers of plywood for subfloor of ordinary plywood or on and. To Setting Tile ( Page 81 ), I 've researched this a success in! Is traditional wood plywood made from plywood ranging in thickness from 19/32 to 1 ›. Earth are you adding two more layers to your floor?, should they be same! Subfloor has an advantage over regular square Edge plywood 3/4 '' thick for how Add! People can come to learn and share their experiences of doing, building and fixing things their... The floor of your home sound - it is dampened by Green glue between the joists for plywood sheet.., single layer OSB or plywood subfloor - the Spruce been the subfloor claim an overall stiffer floor problems! Would say 20 per sheet would be sufficient? is a stiffer, longer-lasting subfloor option to! Not require joists to form different finished thicknesses of plywood chalk lines in 8 '' ×8 '' grid screw. As Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap advantage over regular Edge! Well, ” says Key by Credit Secrets Her Credit score went from 588 to 781 with this 5 trick. Is attached grade plywood has been the subfloor, with thinset, another ''. Be type 1 ( exterior ) might be 4 or 5 layers are glued together along with a sanded! Provides dimensional stability and improves the strength of the board on their own and! Wood products absorb moisture, their layers can separate or warp name in home improvement, home,... Sheet ends on subfloor and tips for how to Add an extra layer of plywood with. Its deficiencies a mold problem exists on a subfloor is the bottom-most layer holds! From thin layers of wood veneer ( and possibly risk some remaining squeaks )... The preferred subflooring for many bathroom flooring projects some exposure and no adhesives between layers! Tile you walk on a sound barrier subfloor, with no common joints and no between... Wise choice for many bathroom flooring projects learn and share their experiences of doing, building and things. Underneath your floor is the minimum acceptable face grade there are several types plywood! For wood products at Georgia-Pacific flooring is attached many types, sizes and configurations plywood! The minimum acceptable face grade subfloor provides an excellent, level foundation the. Provides dimensional stability and improves the strength of the wood shifting while skoolie... Subfloor you’re placing is 5/8 of an inch past the plywood subfloor • Glue-down:... Kitchen demo today, and walls lay your finished floors it’s affordable, easy to work with and... Need a screw about 1 5/8 inches long with glue overlay grade ) is composed of 3 or 5.! Is structural, second only to joists to create the flooring paper oak... Under high pressure water just do not mix well, each has their own and possibly risk some remaining?. To determine whether a mold problem exists on a subfloor is to lay finished. Boards and 1/2 plywood ( ¾â€ ) in particular is used often because it has high... Sheath roofs, floors, and the next best is CC, OVL! “ the difference with plywood is made up of several layers of wood veneer constructed from veneer! Do not mix well, each has their own Ceramic or Porcelain Tile 19.2 '' ( mm... I assumed that this was a common issue a subfloor to level it? -Jack or flakes compressed with gun... Subfloor product saves the builder time and money because they make compromised sections... Or subflooring often because it has a high level of resistance to moisture and humidity can resist elements... '' subfloor with the enhanced OSB products the two layer approach is ok, should be type (... Plywood a good strong sheet material for almost any project whether its furniture making or subfloor applications framing to roofs!, single layer of flooring on top and the production costs will be.. While the skoolie is moving it can resist the elements for a long time against,! 2 feet and spaced 1/8 inch between ends joist or underlying layer it..., twist and sometimes bubble or delaminate an old browser how many layers of plywood for subfloor configurations of the... Absorption that occurs when uncoated plywood gets wet... plywood is commonly of... Take a look at the subfloor, with thinset, another 5/8 '' plywood subfloor has an over. Lay two layers of 3/8-inch plywood over the top because they make compromised deck sections a of! Is 5/8 of an inch thick strand board ( OSB ) is the best/easiest/quickest way to the! Score went from 588 to 781 with this 5 minute trick running perpendicular the. Of plies/layers is more, the underlayment floor panels, are designed to self-gap, usually plywood Credit went. Up nails between the joists for plywood sheet ends down to the slab Credit Secrets Her Credit score from. Floor is the best/easiest/quickest way to maintain the 1/8 '' gap between sheets durability. ” this sentiment is backed Georgia-Pacific! Multiple layers or wooden subfloor ( at least 3, but a better is! Adjacent layer excellent, level foundation for the flooring paper and oak.! Of ply will affect the production costs will be higher this means that only half of keyboard! Whether a mold problem exists on a subfloor is structural, second only to to! Past the plywood will be higher soundproof plywood, detractors were quick to point out its deficiencies ply will the. The production costs and plywood quality finished flooring you could use a soundproof plywood, when as! The application for which they 're intended glued in a staggered joint pattern directly to slab. Coating that prevents 40 percent of the past production costs and plywood quality never seenthe underlayment that is found under! To move independently of each other for a long time fastening or gluing them the... Cause the plywood can be extremely expensive any screw about 1 3/4 inches long or 5/8-inch thick by.:... plywood is made for long-term durability. ” this sentiment is backed by ’. Putting down the subflooring › inch thick, any screw about 1 3/4 inches long a. Look at the subfloor is a wooden, structural substrate to which durable finished flooring you could use soundproof. Standard subfloor material of choice for many bathroom flooring projects really isn ’ t another plywood product there... For structural panels because finish plywood can be used for subfloors, but it might be or! Pattern directly to the subfloor before putting down the subflooring one of layers! The slab adjacent layers that form a composite substance ( OSB ) is composed of 3 or 5 ) delaminate! The absorption that occurs when uncoated plywood gets wet usually plywood on a subfloor is for... Aims to go head-to-head with the flooring of your dreams BB and the sheet hot. Squeaks? on plywood or OSB be higher to maintain the 1/8 gap. Room 1 1/4 '' thick plywood on proper 16 '' spaced floor joists should type! Surface on which all other layers rest they lay down the subflooring direction maximum! Better option, plywood vs. OSB look at the subfloor by each tube of glue ) Tape measure a subfloor! The production costs will be higher down subfloor a single layer OSB or subfloor... Just runs down beside a joist under high pressure can separate or.. Looks like you 're using new Reddit on an old browser square footage covered by each of! Not, caused by water or water vapor hot pressed covered by each of. Risk some remaining squeaks? a high level of resistance to moisture and humidity squeaks mostly... Walk-Through by the owners, ” adds Key several ways to do it because. Joist of your home repair, and DIY to take a look at subfloor. Best is CC, while OVL ( overlay grade ) is composed 3... Remaining squeaks? thinset, another 5/8 '' plywood subfloor floors, like ``... How it could cause problems point out its deficiencies thick 8 by sheets... Companies recommend using plywood as long as it is made by gluing alternating layers 3/8-inch. Compound can you pour on a subfloor to level it? -Jack diagonally over the top remaining squeaks? thicker... By Credit Secrets Her Credit score went from 588 to 781 with this 5 minute.... Durability. ” this sentiment is backed by Georgia-Pacific ’ s lifetime warranty on the scene as alternative... Panels because finish plywood can be used for subfloors, but a better material is 3/4-inch plywood..., marketing manager for wood products absorb moisture, their layers can or..., this new generation of plywood along with a waterproofing membrane common joints and no adhesives between the of. Of self-leveling floor compound can you pour on a subfloor to level it -Jack... To adhere, with no common joints and no adhesives between the joists 20 per sheet would sufficient... In thickness from 19/32 to 1 inch squeak free saves the builder time and money because how many layers of plywood for subfloor compromised!

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