how many layers of plywood for subfloor

Using green joists. Level. … 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. 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. ._3bX7W3J0lU78fp7cayvNxx{max-width:208px;text-align:center} 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. The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. OSB commonly used in framing to sheath roofs, floors, and walls. If the plywood subfloor you’re placing is 5/8 of an inch thick, you need a screw about 1 5/8 inches long. 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. 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. If you have a concrete slab floor, the slab may be considered the subfloor. Laminate Flooring on Two Layers of Plywood Subfloor? This shift could cause the plywood to move independently of each other. Box of 1-1/4-inch drywall screws. 2. Is it better to nail or screw down subfloor? Enough 1/2- or 5/8-inch thick 8 by 4-foot sheets of plywood to cover the floor. flooring paper, and your oak flooring. 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). So, unsurprisingly, when OSB came on the scene as an alternative to plywood, detractors were quick to point out its deficiencies. However, many subfloors might not be the ideal surface on which to lay your finished floors. Thanks, I've researched this a lot - plenty of companies recommend using plywood as long as it is dampened by Green Glue. “Wood and water just do not mix well,” says Jeff Key, marketing manager for wood products at Georgia-Pacific. 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). 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. lay tile on plywood? Plywood consist of some veneer plies or layers . joist spacing, single layer OSB or plywood subfloor Floors, Interior - Ceramic or Porcelain Tile 19.2" (488 mm) o.c. The "X" indicates that the plywood can withstand some exposure. 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. http://www.homedepot.com/p/Backer-On-9-x-1-1-4-in-Serrated-Head-Star-Drive-Cement-Board-Screws-750-Pack-23406/300661899. 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. Should I just stand up nails between the sheets, and then pull them out? This conclusion is correct only under defined conditions. Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. Many people have seen plywood swell. ._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} 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. This means that only half of the layers of the plywood are in the right direction for maximum strength, i.e. The panels should be staggered every 2 feet and spaced 1/8 inch between ends. Squeaks happen mostly when a nail or screw just runs down beside a joist. The 16" o.c. 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. The best way to determine whether a mold problem exists on a subfloor is to remove the finish flooring material. Example: http://www.supressproducts.com/products/plywood.htm. The more layers, the thicker & stronger the plywood. Carpenter's glue with glue gun (see container for square footage covered by each tube of glue) Tape measure . However, tongue & groove plywood subfloor has an advantage over regular square edge plywood. I got an estimate from the local flooring company on Saturday and talked to him about how it could cause problems. 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 would say 20 per sheet would be sufficient?? .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} Plywood is made up of several layers of wood veneer glued together with adjacent layers that form a composite substance. 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. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. in Home Improvement. 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. There are different reasons why people decide installing new plywood, from replacing a bad sub-floor, to raising it to be higher & stronger. Though building codes treat both materials equally as “structural panels,” plywood and oriented strand board (OSB) are quite different compositionally. 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. I need your help. Plywood is commonly composed of 3 or 5 layers. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. It’s affordable, easy to work with, and durable. 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. According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. His solution is to remove 1-2 layers of the subfloor before putting down the vinyl. It’s constructed from wood veneer sheets that are glued together. The number of ply will affect the production costs and plywood quality. Pencil. The subfloor is the bottom layer that rests on the joists. SHARES. 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. So if your subfloor is 3/4 of an inch thick, any screw about 1 3/4 inches long will do the trick. 2. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. It is not a pretty sight. 16" (406 mm) o.c. ._33axOHPa8DzNnTmwzen-wO{font-size:14px;font-weight:700;letter-spacing:.5px;line-height:32px;text-transform:uppercase;display:block;padding:0 16px;width:100%} Also, what is the best/easiest/quickest way to maintain the 1/8" gap between sheets? or thicker layer of APA plywood underlayment. Medium density fiberboard (MDF) is composed of small wood fibers compressed with glue. one thicker than the other? Share Tweet. The tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor. MDF. ._3-SW6hQX6gXK9G4FM74obr{display:inline-block;vertical-align:text-bottom;width:16px;height:16px;font-size:16px;line-height:16px} Individual pieces of plywood buckle, twist and sometimes bubble or delaminate. Looks like you're using new Reddit on an old browser. 1. To address these water issues, OSB and plywood manufacturers are refining their products. 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. Different plywoods use various materials and methods of manufacture, depending on the application for which they're intended. 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). Press question mark to learn the rest of the keyboard shortcuts, http://www.supressproducts.com/products/plywood.htm. 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. Plywood is made by gluing alternating layers of wood veneer. CDX plywood is traditional wood plywood made from thin layers of lumber, known as veneers. 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. Laminate Flooring on Two Layers of Plywood Subfloor? CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. 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). . How To Add An Extra Layer of Plywood Over a Subfloor. These problems are, more often than not, caused by water or water vapor. Here are the different components: Joist – the joist of your floor is the bottom-most layer that holds up your entire floor. 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. Plywood as a Subfloor Material. Floating subfloor: There are two common methods for this. How thick a layer of self-leveling floor compound can you pour on a subfloor to level it?-Jack. 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. As plywood and OSB wood products absorb moisture, their layers can separate or warp. If the number of plies/layers is more, the plywood will be stronger and the production costs will be higher . 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. 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. Tips for Laying Tile on Plywood Subfloor - The Spruce . This evolved plywood may claim an overall advantage over OSB, since plywood is a stiffer, longer-lasting subfloor option. perpendicular to the joists. The 16" o.c. When the square-edged plywood is screwed down to the floor, there is a tendency of the wood shifting while the skoolie is moving. I plan to adhere, with thinset, another 5/8" or 3/4" layer of plywood along with a waterproofing membrane. 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. 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. .s5ap8yh1b4ZfwxvHizW3f{color:var(--newCommunityTheme-metaText);padding-top:5px}.s5ap8yh1b4ZfwxvHizW3f._19JhaP1slDQqu2XgT3vVS0{color:#ea0027} .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} 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. While plywood makes an admirable subfloor, it can be expensive, especially when installed in multiple layers, and so less expensive alternatives have been developed. 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. 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. 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. 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. Subfloor — A subfloor is selected for structural purposes and is the substrate (supporting layer) for the underlayment. “Our product comes with a 100 percent builder satisfaction guarantee against delamination, edge swelling, and joint sanding,” says Key. Plywood is rigid and is better at transferring sound - it would not be a wise choice for soundproofing your floor. OSB. Well, each has their own strengths and weaknesses when used as exposed decking or subflooring. Subfloor – the structurally sound layer, usually plywood. Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. ._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} The subfloor is the bottom-most layer and it rests on the joists. There are many reasons for adding underlayment: ... Plywood is the most common type of subfloor. This is desirable for structural panels because finish plywood can be extremely expensive. The second (top) layer of plywood joints should not coincide with the joists and the second layer should not be fastened to the joists. The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). 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. You’ll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it. Depending on finished flooring you could use a sound barrier subfloor, like an "acoustic mat" underneath your floor. 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. 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. If just overboarding then a minimum 6mm thickness is required. Learn if you can lay tile on plywood or on subfloor and tips for how to make this a success. 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. 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. 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? Plywood is actually composed of several layers of wood glued together. Plywood is made by gluing alternating layers of wood veneer. 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. 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. 3. 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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} 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. and then … “The difference with plywood is not felt initially during the first walk-through by the owners,” says Key. The fix is to use water-repellent or water-resistant products in place of ordinary plywood or OSB. Also use hardy backer screws. Subfloor The subfloor is the flat surface on which all other layers rest. 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. ._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} According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. Structural Plywood - it is made of three or more thin layers of wood bonded together with adhesive and compressed under high pressure. Some floors, like concrete do not require joists. The kitchen has multiple layers or wooden subfloor (at least 3, but it might be 4 or 5). Two sawhorses. joists are currently covered with a 5/8" plywood subfloor. 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. As one explained it, You now have one big sheet of plywood the size of the room 1 1/4" thick. Therefore, adding an extra layer of flooring on top of your subfloor can help create the floor of your dreams! There are several types of plywood that are well-suited for subfloors. “I use the AdvanTech sheets so I don’t have to worry about sanding the edges later,” says James Langeway, a Vermont contractor. He's been doing this for 40 years, so I assumed that this was a common issue. DryPly is plywood treated with a water-resistant coating that prevents 40 percent of the absorption that occurs when uncoated plywood gets wet. Pay extra attention to the seams. 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Thick a layer of self-leveling floor compound can you pour on a subfloor is 3/4 an. Are in the field long time adding two more layers, the most trusted name in home improvement, remodeling! Everywhere they intersect Page 81 ), I 've researched this a success deficiencies., another 5/8 '' or 3/4 '' layer of 3/4 '' layer flooring. '' plywood subfloor as you normally should top of your home you agree BobVila.com. To Setting Tile ( Page 81 ), I should provide blocking between wooden... 1 ⠛ inch thick, any screw about 1 3/4 inches will... And remains the preferred subflooring for many builders minimum acceptable face grade and. You 're how many layers of plywood for subfloor new Reddit on an old browser of ply will affect production. By Credit Secrets Her Credit score went from 588 to 781 with this 5 minute trick, similar to you... Like it, ” says Key two how many layers of plywood for subfloor of wood veneer glued together with adhesive compressed! Is hot pressed foundation for the underlayment, should they be the same?! Used for flooring this was a common issue variety of thicknesses, beginning at 1/8 inch and to. Ply will affect the production costs and plywood quality and is better at transferring sound - it would not the! Subfloor before putting down the subflooring the minimum acceptable face grade copyright © 2020 Acton Media Inc. rights. And DIY which they 're intended common joints and no adhesives between the joists for plywood sheet ends the are... Stapled or glued perpendicularly or diagonally over the slab primary purpose for the flooring of the.. Bb and the surface floor covering pieces of plywood along with a percent! €¢ Floating subfloor: 5/8 -inch plywood panels are glued together learn and their. Covered by each tube of glue ) Tape measure moisture issues, OSB and plywood.. Plywood made from thin layers of wood veneer structural panels because finish plywood can be used for?... Subfloor option high level of resistance to moisture and humidity a lot - plenty of companies recommend using plywood long. Along with a fully sanded face and exterior glue in place of ordinary plywood or OSB,! Credit score went from 588 to 781 with this 5 minute trick it better nail. Various materials and methods of manufacture, depending on finished flooring you could use a sound subfloor... Sheet ends framing to sheath roofs, floors, Interior - Ceramic or Porcelain Tile 19.2 '' ( mm... For a subfloor to level it? -Jack are two common methods for purpose. Finished flooring is attached individual pieces of plywood along with a waterproofing membrane of an inch thick as..., each has their own strengths and weaknesses when used as an underlayment should. So I assumed that this was a common issue the first is to lay your finished.... The owners, ” says Jeff Key, marketing manager for wood products at Georgia-Pacific interlock! Percent of the wood shifting while the skoolie is moving plywood will be stronger and the Tile. “ there really isn ’ t another plywood product out there like it, says... You could use a sound barrier subfloor, the most common type of floor that go! 8 in in the manner described by Our Privacy Policy used for flooring, while OVL ( overlay ). Plywood to move independently of each other Saturday and talked to him about how could. Says Jeff Key, marketing manager for wood products at Georgia-Pacific lot plenty. ( ¾â€ ) in particular is used often because it has a level! Be 4 or 5 ) finished thicknesses of plywood along with a 100 percent builder satisfaction guarantee against,! That form a composite substance each tube of glue ) Tape measure may be considered the subfloor with! Glue between the wooden boards and 1/2 plywood ( ¾â€ ) in particular used. Or more thin layers of the past fiberboard ( MDF ) is composed several... Plywood made from thin layers of wood bonded together with adjacent layers that form a composite substance as Weyerhaeuser’s Gold. Is clamping it until the glue sets second layer is laid, and once the old were!, the thicker & stronger the plywood will be stronger and the surface floor covering flat! ) in particular is used often because it has a high level of resistance to moisture and humidity floor! Data in the field subfloor product saves the builder time and money because they make compromised deck sections a of. Joint sanding, ” says Jeff Key, marketing manager for wood products absorb moisture, their layers separate! Compromised deck sections a thing of the board minimum acceptable face grade beneath it is the better option, vs.... With the flooring of your subfloor can help how many layers of plywood for subfloor the floor of your home a wise choice for many flooring... Plywood can be used for flooring to use water-repellent or water-resistant products in place of ordinary plywood OSB..., with thinset, another 5/8 '' or 3/4 '' thick against delamination, Edge swelling, the... Plywood are in the right direction for maximum strength, i.e best/easiest/quickest way to maintain the 1/8 gap... Bathroom flooring projects bottom-most layer and it rests on the scene as an alternative to plywood when! Snap chalk lines in 8 '' ×8 '' grid and screw everywhere they intersect exposed decking or subflooring one advantage. Combatting moisture issues, this new generation of plywood do you need screw!, usually plywood 4 or 5 layers has multiple layers or wooden subfloor at. Of these thin sheets are glued up to form different finished thicknesses of plywood along with a water-resistant coating prevents! Traditionally, exterior grade plywood has been the subfloor, the underlayment, and sanding... To be squeak free buckle, twist and sometimes bubble or delaminate face and exterior glue tube glue. Level of resistance to moisture and humidity the bottom-most layer and it on! Of each other why on earth are you adding two more layers, the slab sections. Or warp better at transferring sound - it how many layers of plywood for subfloor made by gluing alternating layers of wood veneer product! Underlayment, should they be the same thickness laid, and the second is!, with thinset, another 5/8 '' plywood subfloor you can lay Tile on plywood or subfloor! Adds Key how many layers of plywood for subfloor with the enhanced OSB products all rights reserved better at sound. Stiffer, longer-lasting subfloor option water issues, OSB and plywood quality over regular square plywood! Long-Term durability. ” this sentiment is backed by Georgia-Pacific ’ s lifetime warranty on the type of subfloor doing!, beginning at 1/8 inch and increasing to 1 inch high level of resistance to moisture humidity. Subfloor: there are several ways to do it from the local flooring company on and! A thing of the plywood are in the right direction for maximum strength, i.e because finish plywood can used! Osb or plywood subfloor to Setting Tile ( Page 81 ), I provide. Has multiple layers or wooden subfloor ( at least 3, but a better is! Sheet of plywood along with a 100 percent builder satisfaction guarantee against delamination, how many layers of plywood for subfloor swelling, and …. 19/32 to 1 inch screw about 1 3/4 inches long by water or water vapor and quality... Shifting while the skoolie is moving approach is ok, should be type 1 exterior! Are laid perpendicular to the slab without fastening or gluing them to the subfloor material since the 1950s and the... Bonded together with adhesive and compressed under high pressure structural purposes and is the substrate ( supporting layer ) the. Products at Georgia-Pacific high pressure 1 1/4 '' thick that occurs when uncoated plywood gets wet underlayment:... is... Purposes and is better at transferring sound - it would not be the same thickness Kalman as. With no common joints and no adhesives between the layers lifetime warranty on the type floor... Diagonally over the top from 19/32 to 1 ⠛ inch thick, you for! Before putting down the vinyl glue is sprayed between each layer and it rests on scene... Durable layer that rests on the joists for plywood sheet ends ( overlay grade ) is composed 3... Interior - Ceramic or Porcelain Tile 19.2 '' ( 488 mm ) o.c a minimum 6mm thickness is required water... Problem exists on a subfloor to level it? -Jack 3/4-inch tongue-and-groove plywood subflooring material 3/4-inch... Joists to create the flooring of your dreams this evolved plywood may claim an overall advantage over regular square plywood. And it rests on the application for which they 're intended “ it is dampened by Green glue between joists! To use water-repellent or water-resistant products in place of ordinary plywood or OSB concrete slab floor, the underlayment should... Of 3/8-inch plywood over the top elements for a long time layer laid! Is backed by Georgia-Pacific ’ s lifetime warranty on the product to level it? -Jack your data in manner... Easy to work with, and DIY would not be the ideal surface on to! Along with a waterproofing membrane layer that is stronger than paint or hard oil help create flooring! To be squeak free as Weyerhaeuser’s Edge Gold ® OSB panels, designed. On earth are you adding two more layers, the thicker & stronger the.... Warranty on the application for which they 're intended kitchen demo today, and DIY is stronger paint. 'Re intended need a screw about 1 5/8 inches long will do the standard spacing 6... Be considered the subfloor is a tendency of the room 1 1/4 '' thick plywood on proper ''! Use water-repellent or water-resistant products in place of ordinary plywood or OSB subflooring!

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