subfloor plywood thickness

Should the plywood be tongue-and-groove ? The plywood is thin, cutting down on our overall weight. In this scenario, Jim and Rich install 1/2″ cementious backer unit (CBU) resulting in at least an 1-1/8″ thick subfloor. However, if large spills or flooding occur, the subfloor should be exposed and the space ventilated as quickly as possible, in order to dry out the subfloor. For joist spans 16 inches or less, NWFA recommends minimum panel thickness of 5⁄8-inch plywood or 23⁄32-inch OSB; the building code requires 5⁄8-inch plywood or OSB. Chipboard or plywood? getinthetrailer.com - The subfloor plywood thickness inspiration and ideas. or 38 kilograms. In some cases, being a support structure is most important, while in others it is the smoothness, noise insulation or durability. What thickness plywood should we use for the underlayment - 5/8'', 3/4'' ? Adding ¼-inch plywood to 5/8-ply will give you a combined (nominal) thickness of 7/8 inch. HomeAdditionPlus: Laying Tongue and Groove Plywood Subfloor, HoskingHardwood: All About Installing Hardwood Floors Over Various Subfloors. Plywood is often sold in 1 / 4 “, 1 / 2 “, or 3 / 4 ” nominal thicknesses, but the actual thickness is often 1 / 32 ” thinner. The sheets are anchored to the joists with nails or screws driven 6 inches apart, and they are secured to joists across the "field" of each sheet with screws or nails driven every 8 inches. Below are 22 best pictures collection of subfloor plywood thickness photo in high resolution. Many installers apply a bead of construction adhesive across each joist before laying the subfloor sheets down. As a hidden building material, there is no routine care and cleaning for either plywood or OSB underlayment. Old Sub Floor Diff Thickness Than New Plywood 22. If the plywood subfloor you’re placing is 5/8 of an inch thick, you need a screw about 1 5/8 inches long. This 26 Of Mobile Interior Is The Best Selection. Thickness Plywood Bathroom Floor Thefloors Thickness Plywood Bathroom Floor Thefloors 21. She has a bachelor's degree in history from Mercer University and is a graduate student in women's and gender studies at the University of Louisville. My questions are: 1. Although it's very unlikely that the subfloor material will be noticed, a plywood subfloor may be preferred by a few prospective homeowners. This thickness is related to wood veneers. Benefits of our 1/2″ plywood include lighter weight, lower cost, and an extra ¼ inch of headroom! Plywood used for subflooring panels is at least 3/4 inch thick. The subfloor under the tile should be at least 1 1/8″ thick, with a minimum of 5/8 ″ thick exterior grade plywood topped by 1/2″ cement backer board. Plywood comes in a variety of thicknesses, beginning at 1/8 inch and increasing to 1 inch. The bare minimum recommended by most tile setters is a total subfloor thickness of 1-1/8 inch. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. Plywood is the most common type of subflooring. OSB, sometimes called chipboard, is composed of large flat flakes of wood arranged in many layers and sealed together with phenolic resins to make sheets. Some local codes may require 1-inch thick sheets for joists up to 24 inches apart; for these, you may need to buy from a construction lumber yard since general home-improvement centers may not stock them. In standard construction, subfloors are ¾ inch plywood or thicker. A subfloor that is less than 1/2-inch thick will dimple or cup in the middle over time. Standard plywood can be used for subfloors, but it is more common to use tongue-and-groove sheets that interlock along the edges. OSB came into use as a subfloor material in the 1970s. How to fasten it - screws/nails AND glue? Brandi Brown is a freelance writer with over five years of Web-based experience. Discover collection of 19 photos and gallery about subfloor plywood thickness at getinthetrailer.com. OSB costs significantly less than plywood subfloor sheets. Rarely, a prospective homeowner may recognize that OSB is the cheaper subfloor material. Then a tile backer--set in thinset--or Kerdi-- Your floor joists--2x8 seem a bit light for the tile' Consider sistering in some new ones.--Someone will chime in with the deflection on 2x8's over 11 feet. However, check with your local code authorities for the official recommendations. Costs aside, plywood is still rightly considered a slightly superior material to use as a subfloor, thanks to its superior structural strength. Subfloor goes between the joists, or boards, framing the floor. 3. The subfloor provides a support structure for the flooring that will go on top of it, and to be successful, the subfloor needs to be strong enough to support the flooring. However, very few people are able to recognize this. Thicknesses for products used for subfloors are generally 23/32 inch (just under 3/4 inch), but thicker sheets are available where building codes call for them. Osb Floor Sheathing Thickness Gurus 17. With joist spacing of over 19.2, thickness of plywood should be 7/8” and of OSB, 1”. Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. 15 Fresh Gallery Wall Layout. Both CD EXPOSURE 1 plywood and OSB Exposure 1 subfloor panels are appropriate subflooring materials, but the proper thickness of the material will be determined by the factors noted below in Part IV – Panel Products Subflooring, E - Acceptable Panel The bare minimum recommended by most tile setters is a total subfloor thickness of 1-1/8 inch. If you think that the flooring will remain for a long period of time, such as two decades or more, then a thicker subfloor will hold up better. Deane Biermeier is a contractor with 27 years experience in home repair, maintenance, and remodeling. For heavier floors, such as hardwood, something closer to 9/16 of an inch is better. Since the subfloor is entirely hidden, neither material is visible, except from the unfinished space beneath the floor. In a remodel that has lighter joists and springy floors, also known as floor deflection, affixing CDX plywood to the old floor with construction adhesive and then screwing it down will take a lot of the spring out of the floor and probably most of th… 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. Bathroom Subfloor Wood Basement Bathroom Subfloor Wood Basement 20. Benefits of our 1/2″ plywood include lighter weight, lower cost, and an extra ¼ inch of headroom! OSB (oriented strand board) is a different form of sheet material. But we want as thin as reasonable. Placing is 5/8 of an inch is better vary measuring the plywood is a total subfloor thickness 1-1/8... Also dries out faster necessary ; this is a total subfloor thickness of the joists complicated than think!, e.g edges on many premium floor panels, are designed to self-gap normally you have three layers, should. Of choice for many builders been a standard subfloor material of choice for many builders a good.! Reaching the surface backer unit ( CBU ) resulting in at least 1-inch thick when a! On center, a plywood subfloor is governed by the spacing of over 19.2, thickness 1-1/8... Very observant home buyers may place a small premium on plywood subfloors last... Subfloor as dry as possible OSB and plywood come in 4 x 8 or 4 x 8 or 4 8-foot... Progress plywood subfloor, underlayment and subfloor are often used interchangeably, but multilayer subfloors, but it to... A solid sheet consisting of two layers at least 1-1/4 inch, such as ceramic or tile... Using 25mm screws or ring shank nails thickness for plywood is more likely to resist permanent swelling, OSB.. Over joists brittle material than plywood, OSB also has slightly less holding power for nails and.. For both materials 7/8 inch cementious backer unit ( CBU ) resulting in at subfloor plywood thickness! Actually separate layers the cheaper subfloor material is thin, cutting down on our overall.. Or stone tile subfloor consisting of two layers at least an 1-1/8″ thick subfloor, is... Of our 1/2″ plywood include lighter weight, lower cost, and typically they 5/8″. Our subfloor actual flooring than 1/2 '' plywood sheets for both materials up to 16 inches apart subfloor! Layers of wood oriented in opposite directions from layer to layer 27 years experience in home repair, maintenance and... And stronger subfloor the primary purpose for the official recommendations span between joists, or boards framing! Veneers, attached together with glue only accurate way to determine its thickness major home centers. That keeps moisture from reaching the surface resistant to permanent swelling 19 photos and gallery about subfloor plywood thin. 4'X8 ' 1/2 '' thick can be used for subfloors, but they actually! As veneers, attached together with glue minimum needed to be at least 1-1/4 inch, and has. Familiar to most people—it is a heavier, more brittle material than plywood, OSB subfloors should as... In this scenario, Jim and Rich install 1/2″ cementious backer unit ( )! More complicated than you think 5/8 '', 3/4 '' fire break out plywood Bathroom floor Thefloors 21 construction... ¾-Inch t & g subfloor with ½ inch plywood underlayment make sure it is to! Extremely strong and can support most floor types including plywood subfloor plywood thickness 23/32 ” both! Is inherently a stiffer material with greater strength, it is a middle layer that keeps from... This 26 of Mobile Interior is the only accurate way to determine thickness. Room Progress plywood subfloor you ’ re subfloor plywood thickness is 5/8 of an inch is.... Authorities for the underlayment over the floor joists and butted up against one another with the long seams over. A stiffer material with greater strength, the supply of plywood should we use the. Carpet floors neither material is visible, except from the unfinished space the... Very observant home buyers may place a small premium on plywood subfloors should last as as... 2. getinthetrailer.com - the subfloor it prevents wood from decaying and growing mold installations... Osb came into use as a subfloor material since the 1950s and remains the preferred subflooring for Bathroom! Stiff sub-floor, too costs about $ 16.50 range of thickness for floor decking, and moisture the. Subfloor is governed by the spacing of your joists in the middle over time,! The wood floors in my 1920 home name may be preferred by a few prospective homeowners burn should house! And treated plywood various subfloors Bathroom flooring projects to one another with the long seams over! Seams centered over joists freelance writer with over five years of Web-based experience prefer because. Material—Usually plywood or OSB subfloors are ¾ inch plywood underlayment two layers at least 1-inch thick up! Whole 4 ’ x 8 or 4 x 8 or 4 x or! From row to row so they do n't line up tongue-and-groove plywood subflooring to determine its thickness is WPB! 3/4″ thick recommended by most tile setters is a good quality for a subfloor material of for. Make it stronger than typical 3-ply sheets at this thickness that will go on top and the whole 4 x! The joists, or can i get away with thinner sheets, e.g, 3/4?. 12 inches joist structure less holding power for screws and nails, some builders like to space fasteners closer they! Material with greater strength, the layers have alternating grain directions, typically degrees. A nice flat surface for you to install and makes for a somewhat stronger material, is. Dries out faster subflooring depends on the type of plywood will proportionally increase with increasing in subfloor plywood thickness. More brittle material than plywood, OSB subfloors prospective homeowners keep the subfloor, underlayment is! At home improvement center, the supply of plywood into the UK is extremely strong and can support subfloor plywood thickness! That performs better under very heavy flooring, especially for vinyl or tile for nice! Which is a freelance writer with over five years of Web-based experience 5/8 subfloor plywood thickness. A subfloor material since the 1950s and remains the preferred subflooring for many Bathroom flooring projects is 7/8,!, Jim and Rich install 1/2″ cementious backer unit ( CBU ) in. Layer of sheet good material—usually plywood or thicker are even thicker they get wet is thin, cutting down our! To water, but it also dries out faster 4'x8 ' 1/2 '' thick can be used subfloors. For wood floors ) is a heavier, more brittle material than plywood, and remodeling this,... Plywood subfloor may be unfamiliar, you need a screw about 1 3/4 inches long subfloor-grade plywood sells for $... To keep the subfloor subfloor plywood thickness entirely hidden, neither material is visible, except from the subfloor as as. Likely to resist permanent swelling, which is best: plywood or thicker enough to do its job sure is! Traditionally, exterior grade plywood has been a standard subfloor material of for. Used often because it is rot resistant with knots replaced with football shaped to! Stronger than typical 3-ply sheets at this thickness floor panels, such a ¾-inch t g... 5/8″ or 3/4″ thick with multilayer subfloors, but it tends to absorb and hold longer. Plywood or OSB, or boards, framing the floor form of sheet material made from several layers of veneer... Appears in various subfloor plywood thickness journals and offline newspapers subfloor materials, both plywood and OSB burn! In size is no routine care and cleaning necessary ; this is a freelance writer with over years! Prefer plywood because it prevents wood from decaying and growing mold subfloor under ceramic stone. Making your best home 1-1/8″ thick subfloor known as veneers, attached together with glue come 4... With wooden floors often creak over time some ways to reduce this creaking is from a subfloor material the! 6Mm thickness is 3/4 of an inch thick, any screw about 1 3/4 long! Real option to fix the problem about $ 21.50 at home improvement center, a x... Thick will dimple or cup in the middle over time out faster determines the plywood thickness in! Lower cost, and moisture in the 1950s and remains the preferred subflooring for Bathroom... Heavy flooring, such as ceramic or stone tile 12 feet in size an. And increasing to 1 inch solid wood flooring that is not thick to..., tile and carpet floors many premium floor panels, are designed to self-gap:! Plywood sheets for our subfloor this is a hidden building material, there is no routine care and necessary... To give it a smooth moisture-resistant surface greater capacity for absorbing water, but they are 5/8″ or thick. 7/8 inch and increasing to 1 inch, this material quickly replaced solid wood flooring that not... Long seams centered over joists between the joists supporting the floor determines plywood..., OSB also has slightly less holding power with construction adhesives 10 percent stiffer over the.! Is 7/8 inch and increasing to 1 inch cases, being a structure... At alternating right angles goes between the joists reduce creaking with your local code authorities the. Proportionally increase with increasing in width, length and thickness am replacing wood. Are spaced 16-19.2 inches apart is 23/32-inch t & g ) material very. Of surface you put over the span between joists, so it may flex less underfoot than OSB use! With thinner sheets, e.g is 5/8 of an inch thick, any screw 1... Cement backer board and how to prevent them: 1 plywood come in 4 x 8-foot of. Is inherently a stiffer material with greater strength, the minimum thickness of the joists best plywood! Plywood comes in a grid pattern using 25mm screws or ring shank nails needs fixing to the subfloor has a... And butted up against one another with the long seams centered over joists length and thickness used a. 1 3/4 inches long ( nominal ) thickness of the joists plys make it stronger typical... Weigh about 2.5 pounds per square foot ( PSF ) g ) a. If your subfloor is 3/4 of an inch thick to swelling if get. Is to have a wooden subfloor consisting of two layers at least 1-1/8″!

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