Using green joists. 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). 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. It's made from plywood ranging in thickness from 19/32 to 1 ⅛ inch thick. There are different reasons why people decide installing new plywood, from replacing a bad sub-floor, to raising it to be higher & stronger. This provides dimensional stability and improves the strength of the board. 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. This is desirable for structural panels because finish plywood can be extremely expensive. 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. 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. 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. “I use the AdvanTech sheets so I don’t have to worry about sanding the edges later,” says James Langeway, a Vermont contractor. The panels should be staggered every 2 feet and spaced 1/8 inch between ends. So all the screws are really doing is clamping it until the glue sets. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top. Many layers of these thin sheets are glued up to form different finished thicknesses of plywood. 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 subfloor is the bottom-most layer and it rests on the joists. It is not a pretty sight. Plywood Tips. 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. 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. 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. • Glue-down subfloor: 5/8 -inch plywood panels are glued in a staggered joint pattern directly to the slab. 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. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} Thank you! There are many reasons for adding underlayment: ... Plywood is the most common type of subfloor. 1. Plywood is made by gluing alternating layers of wood veneer. There are many types, sizes and configurations of plywood. ._1PeZajQI0Wm8P3B45yshR{fill:var(--newCommunityTheme-actionIcon)}._1PeZajQI0Wm8P3B45yshR._3axV0unm-cpsxoKWYwKh2x{fill:#ea0027} I'm guessing these are what you mean? Subfloor – the structurally sound layer, usually plywood. 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. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. joist spacing, single layer OSB or plywood subfloor Floors, Interior - Ceramic or Porcelain Tile 19.2" (488 mm) o.c. 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. How To Add An Extra Layer of Plywood Over a Subfloor. Individual pieces of plywood buckle, twist and sometimes bubble or delaminate. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. Plywood sheets are laid perpendicular to the subfloor, with no common joints and no adhesives between the layers. Different plywoods use various materials and methods of manufacture, depending on the application for which they're intended. • Floating subfloor: There are two common methods for this. If you have a concrete slab floor, the slab may be considered the subfloor. Plywood is made up of several layers of wood veneer glued together with adjacent layers that form a composite substance. 2. I got an estimate from the local flooring company on Saturday and talked to him about how it could cause problems. Otherwise I would go directly over the existing 1/2" subfloor with the flooring paper and oak floor. joists are currently covered with a 5/8" plywood subfloor. Your floors consist of layers, similar to how you would make a sandwich. According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. 1. Is it better to nail or screw down subfloor? Using green joists. Carpenter's glue with glue gun (see container for square footage covered by each tube of glue) Tape measure . Plywood is the most common type of subflooring. The best way to determine whether a mold problem exists on a subfloor is to remove the finish flooring material. The smaller fibers … Although this is not a guarantee that there is mold present, it is an indication of a potential problem area that requires further inspection. Do I still need to do the standard spacing - 6 inches around the perimeter and 8 in in the field? Fasten your first layer plywood subfloor as you normally should. 3. 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. 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. 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). 2. 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. OSB. Using a water-resistant subfloor product saves the builder time and money because they make compromised deck sections a thing of the past. MDF. Plywood consist of some veneer plies or layers . 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. SHARES. 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 commonly composed of 3 or 5 layers. 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. Enough 1/2- or 5/8-inch thick 8 by 4-foot sheets of plywood to cover the floor. According to Setting Tile (Page 81), I should provide blocking between the joists for plywood sheet ends. Plywood is actually composed of several layers of wood glued together. 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. and then … Box of 1-1/4-inch drywall screws. If you're determined to do it from the 2nd story there are several ways to do it. OSB commonly used in framing to sheath roofs, floors, and walls. Floating subfloor: There are two common methods for this. “Our product comes with a 100 percent builder satisfaction guarantee against delamination, edge swelling, and joint sanding,” says Key. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). The alternating layers make plywood a good strong sheet material for almost any project whether its furniture making or subfloor applications. Should I just stand up nails between the sheets, and then pull them out? Structural Plywood - it is made of three or more thin layers of wood bonded together with adhesive and compressed under high pressure. 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. 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). 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. 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. Written by Stacy Randall. A place where people can come to learn and share their experiences of doing, building and fixing things on their own. lay tile on plywood? Depending on finished flooring you could use a sound barrier subfloor, like an "acoustic mat" underneath your floor. 2. ._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 tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor. By combatting moisture issues, this new generation of plywood aims to go head-to-head with the enhanced OSB products. .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} 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 other half are parallel with the joists, so provide very little strength. If just overboarding then a minimum 6mm thickness is required. 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 really isn’t another plywood product out there like it,” adds Key. If just overboarding then a minimum 6mm thickness is required. 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. 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. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. It’s affordable, easy to work with, and durable. How many layers of plywood do you need for a subfloor? I would say 20 per sheet would be sufficient?? His solution is to remove 1-2 layers of the subfloor before putting down the vinyl. The number of ply will affect the production costs and plywood quality. Press question mark to learn the rest of the keyboard shortcuts, http://www.supressproducts.com/products/plywood.htm. Well, each has their own strengths and weaknesses when used as exposed decking or subflooring. ._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} Learn if you can lay tile on plywood or on subfloor and tips for how to make this a success. in Home Improvement. ._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)} If you are looking for it to be squeak free. The number of ply will affect the production costs and plywood quality. Circular saw. DryPly is plywood treated with a water-resistant coating that prevents 40 percent of the absorption that occurs when uncoated plywood gets wet. The subfloor is structural, second only to joists to create the flooring of the home. Laminate Flooring on Two Layers of Plywood Subfloor? I just started a kitchen demo today, and once the old cabinets were out I got to take a look at the subfloor. Add 3/4 inch plywood with green glue between the wooden board subfloor and the plywood. 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. Example: http://www.supressproducts.com/products/plywood.htm. Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. or thicker layer of APA plywood underlayment. The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. Though building codes treat both materials equally as “structural panels,” plywood and oriented strand board (OSB) are quite different compositionally. The second (top) layer of plywood joints should not coincide with the joists and the second layer should not be fastened to the joists. This conclusion is correct only under defined conditions. .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 thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. 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). Looks like you're using new Reddit on an old browser. CDX plywood is traditional wood plywood made from thin layers of lumber, known as veneers. This means that it can resist the elements for a long time. Thanks, I've researched this a lot - plenty of companies recommend using plywood as long as it is dampened by Green Glue. CDX plywoodTraditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. ._3-SW6hQX6gXK9G4FM74obr{display:inline-block;vertical-align:text-bottom;width:16px;height:16px;font-size:16px;line-height:16px} Share Tweet. 7 Jan 2020 . And one of the more crucial layers is one that is almost never seenthe underlayment that is found just under the surface floor covering. Plywood is usually used as subfloor today. Use green glue between the wooden boards and 1/2 plywood (and possibly risk some remaining squeaks?) 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. “Wood and water just do not mix well,” says Jeff Key, marketing manager for wood products at Georgia-Pacific. There are several types of plywood that are well-suited for subfloors. I need your help. 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. 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. Posted by 3 hours ago. Close. He's been doing this for 40 years, so I assumed that this was a common issue. . 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. To address these water issues, OSB and plywood manufacturers are refining their products. Your subfloor provides an excellent, level foundation for the flooring of your home. Plywood as a Subfloor Material. 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. Subfloor The subfloor is the flat surface on which all other layers rest. 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. Bottom line is that even cheap, fast grown softwood T&G planks will give you a more solid subfloor than a really expensive plywood. CDX plywood (¾â€) in particular is used often because it has a high level of resistance to moisture and humidity. It’s constructed from wood veneer sheets that are glued together. Why on earth are you adding two more layers to your floor ?! Carpets get padding to add to the life. 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. 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). .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} 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? Subfloor — A subfloor is selected for structural purposes and is the substrate (supporting layer) for the underlayment. How thick a layer of self-leveling floor compound can you pour on a subfloor to level it?-Jack. However, many subfloors might not be the ideal surface on which to lay your finished floors. 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. Your subfloor provides an excellent, level foundation for the flooring of your home. Expert advice from Bob Vila, the most trusted name in home improvement, home remodeling, home repair, and DIY. hi! 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. 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. 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. As one explained it, You now have one big sheet of plywood the size of the room 1 1/4" thick. You can use a soundproof plywood, designed for this purpose. 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. /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/IdCard.8fe90067a922ef36d4b6.css.map*/For sound proofing? Level. ._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)} Engineered or Solid Wood Flooring that is less than 1/2" thick can be installed over a Plywood is made by gluing alternating layers of wood veneer. 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When this swelling takes place after the plywood is installed, flooring, roofing, and or siding products can begin to look less than perfect. If existing subfloor is 3/4 " [email protected] boards- screw 2 or 3 1-3/4 screws into every plank , every joist prior installing 3/4" [email protected] real plywood. 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. IF the two layer approach is ok, should they be the same thickness? 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A tile floor consists of three individual layers: the subfloor, the underlayment, and the surface tile you walk on. 3. Medium density fiberboard (MDF) is composed of small wood fibers compressed with glue. Bob talks with carpenter Bob Ryley and general contractor Kevin Kalman, as they lay down the subflooring. The fix is to use water-repellent or water-resistant products in place of ordinary plywood or OSB. .FIYolDqalszTnjjNfThfT{max-width:256px;white-space:normal;text-align:center} Oriented strand board (OSB) is composed of wood strands or flakes compressed with glue. I just started a kitchen demo today, and once the old cabinets were out I got to take a look at the subfloor. As plywood and OSB wood products absorb moisture, their layers can separate or warp. 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. Also use hardy backer screws. 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. 2. Power drill with screwdriver bit. .s5ap8yh1b4ZfwxvHizW3f{color:var(--newCommunityTheme-metaText);padding-top:5px}.s5ap8yh1b4ZfwxvHizW3f._19JhaP1slDQqu2XgT3vVS0{color:#ea0027} 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. The subfloor is the bottom layer that rests on the joists. Plywood is rigid and is better at transferring sound - it would not be a wise choice for soundproofing your floor. This shift could cause the plywood to move independently of each other. 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? Tips for Laying Tile on Plywood Subfloor - The Spruce . When the square-edged plywood is screwed down to the floor, there is a tendency of the wood shifting while the skoolie is moving. “The difference with plywood is not felt initially during the first walk-through by the owners,” says Key. Snap chalk lines in 8"×8" grid and screw everywhere they intersect. 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. . A single layer of 3/4" thick plywood on proper 16" spaced floor joists should be sufficient. flooring paper, and your oak flooring. 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. One substantial advantage of epoxy is that the forms a hard, durable layer that is stronger than paint or hard oil. Glue is sprayed between each layer and the sheet is hot pressed. The kitchen has multiple layers or wooden subfloor (at least 3, but it might be 4 or 5). .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} While plywood makes an admirable subfloor, it can be expensive, especially when installed in multiple layers, and so less expensive alternatives have been developed. 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. However, tongue & groove plywood subfloor has an advantage over regular square edge plywood. Huber even offers a 50-year warranty on AdvanTech. ._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} While plywood makes an admirable subfloor, it can be expensive, especially when installed in multiple layers, and so less expensive alternatives have been developed. ). I plan to adhere, with thinset, another 5/8" or 3/4" layer of plywood along with a waterproofing membrane. • 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. You agree that BobVila.com may process your data in the manner described by our Privacy Policy. Laminate Flooring on Two Layers of Plywood Subfloor? Which is the better option, plywood vs. OSB? So, unsurprisingly, when OSB came on the scene as an alternative to plywood, detractors were quick to point out its deficiencies. 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. Each layer is oriented with its grain running perpendicular to the adjacent layer. Laminate Flooring on Two Layers of Plywood Subfloor? 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). If the number of plies/layers is more, the plywood will be stronger and the production costs will be higher . Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap. Squeaks happen mostly when a nail or screw just runs down beside a joist. Poplar or Birch Plywood with a fully sanded face and exterior glue. Pay extra attention to the seams. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top. 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. The more layers, the thicker & stronger the plywood. 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. one thicker than the other? 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). You plan on driving on it or something? 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.

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