(You can find these depressions by running the palm of your hand slowly over the face veneer.) When water vapor levels rise, the cells within a piece of plywood pick up the water. Plywood comes in several different thicknesses, widths, and lengths to meet the needs of your project. In any case, the vapor barrier must point to the warm side. If you re working with straight-grained, plain-sliced red oak, for instance, you wouldn t want a portion of it to show irregular cathedral grain. Blocking also becomes less important if the joints perpendicular to the studs are staggered. • Install HardieBacker boards perpendicular to subfloor panels. The shear resistance of the wall stays the same regardless. That is also the easiest way for a clean cut if the other side isn’t visible after assembly. Here s what you need to know. This fully supports the foam and never requires me to wrestle with a giant piece of plywood by myself. Some T&G products, like Advantech, already incorporate this in their product on the t&g side but you still have to space the ends and most people just stick an 8d nail between the sheets to give the correct spacing and then just take it out after nailing it in place. The gap should be 1/8" between ends. The rough side is just what you said, ROUGH. If used for floor or roof sheathing, where the primary purpose is to carry loads perpendicular to the face of the sheets, then it must be placed with the long direction of the sheets perpendicular to the supporting joists or rafters. There are a couple of ways to get this done. Can plywood be stained? Does the seal on plywood go up or ... That is plywood faced at each side by a thin layer of hardwood. Avoid lining up cement board joints with plywood joints. I'm cutting a piece of finished one-side plywood on a table saw, which side goes up rough or finished? The forums are retiring in 2021 and are now closed for new topics and comments. Assuming a remodel, this is going to involve bringing the plywood to the location by hand, as opposed to assistance by a crane. Or a depression in a core ply that telegraphs through as surface roughness. If it cuts backward, then the bad side should be up; the teeth might rip the wood, and you don't want the good side damaged. Attach the cement board throughout the board with 1 1/4-inch cement board screws or 1 1/2-inch galvanized roofing nails. Because studs are crowned all up, sheeting horizontal will pull the crown out and straighten the wall up. I've been using the same piece of foam for about seven years. Then, add a strip of masking tape to both the top and bottom of the sheet, directly over the cut line. Because plywood bends easily on its length, standing it vertical will only allow the stud to bow outwards, or inwards if it was crowned upside down. David Danielson, Bethesda, MD. Plywood should be run horizontal with a 4 foot stagger. Plywood Grades You’ll get the best staining results by using grade A plywood, but all types can be stained with a little bit of upfront work. If you’re embarking on a woo… In some species, where industry grading standards accept sapwood as well as heartwood for the veneer, there will be a color variation. Next comes outfeed support. So make sure that you follow all nailing schedules to the letter. The rare, but not unknown, glue stain from the veneering process should eliminate a side, for instance. the white side might be a bit smoother, hard to tell. Splices, the faintly visible joints between flitches, should be your last consideration after you have settled on the side with the best color and grain. Which is the best face? It typically comes in 4 x 8-foot sheets. A Modern California Home Wrapped in Rockwool Insulation for Energy Efficiency and Fire Resistance, Efficient Methods for Installing Wall Sheathing, Installing ZIP System Sheathing: Fastening, Building a Prototype For Net-Zero Neighborhoods, Simple Way to Make Old Walls Straight and Plumb, Plus, get an extra 20% off with code GIFT20, 2020 FHB House: Framing Changes and Construction Delays, Framing Floors and Stairs with Larry Haun, Expert insights on techniques and principles. With the thicker plywood panels, another trick is to drill carefully from one side only until the tip of the drill bit is just barely starting to break through on the other side. Now that's not a concern when cutting wall or roof sheathing, but it's important to avoid splintering when sawing finer grades of plywood, including expensive hardwood-veneer plywood. Ashton Avegno, an engineer from New Orleans, Louisiana, replies: The orientation of plywood depends on its location and use. How can I keep my router bushing assembly in place? Favorite Answer. Step 1: Get the plywood to the right level of the house. Often, though, the "two-faced" nature of premium grades makes that choice a difficult one. At this point, it's been broken up into smaller pieces, but it's still going. SOme are better than others. How to install metal slides on wood cabinets. Plywood has a good fuel value and can be utilised as energy. Start your subscription today and save up to 52%. If the tongue-and-groove joint doesn't close up, the plywood might be slightly warped. Plywood should be run horizontal with a 4 foot stagger. Click here to add your own comments. The wood is graded on each side from A to D, depending on the level of imperfections, (A being free of all imperfections and knots and D being un-sanded and considerably defected). When you cut plywood with a circular saw then you don’t have to worry about the bottom side of the plywood sheet because tear out only happens on the upper side. The reason I put the bark side down is because when a board dries out and if it start to "cup" it will do so because of the tension caused by each growth ring reducing in thickness a little bit. Although a half sheet of plywood can be a bit unwieldy, the end of the panel riding against the rip fence will provide a stable guide edge. How to install roof sheathing pro builder common mistakes in osb installation blue ribbon osb wall sheathing osb or plywood for roofs walls which side of your osb to paint how to install roof sheathing pro builder. I believe that the studs act as dowels to transfer the loads across the plywood joints. There should be a relief cut on the bottom face to help prevent cupping and where the nail goes through to keep the splinters raising the board off the subfloor. The plywood goes down so the groove is away from the wall, that way, after the row is finished, or at least when you decide to start the next row, a 2X4 can be placed across the joists at the edge of the next row and drive, with a sledgehammer, the second run into the first. In that application it would be a good idea to paint both sides and all edges before installing the panels. Tags: table saw finished one side plywood. well I bought some solid core luan flooring, (no MDF) but am unsure which side should face up. In addition, an A grade designates a plywood that can be stained if needed. Tags: table saw finished one side plywood. Thx. Apply a polymer-modified thin-set mortar to the underlayment before installing the board. You could make the guide from a perfectly straight 1x8 or 1x10, but I prefer a 10- to 12-inch-wide wide rip of ½-inch birch plywood. If the floor is reasonably flat, use 3.5mm. • Lightly butt the … Only the premium grades of hardwood veneer plywood—AA, A, and A1—pose a problem in selecting the right face for a project. Neither of these imperfections can be sanded out, and they will show up noticeably in the finished product. © 2020 The Taunton Press, Inc. All rights reserved. One side of the plywood could be A grade with the other side a D grade. When I cut plywood, I place the plywood on top of the foam, and cut right into the foam. Grain, your second consideration, also should be consistent across the face of the panel you select. Untreated pieces will not hold out as well, and warping and rotting will begin much quicker as time goes on. The forums are retiring in 2021 and are now closed for new topics and comments. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Osb Sheathing Which Side Out. In these situations, I always specify that no plywood joints can occur within 2 ft. of a plate line. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings, and it is required by building codes when insulating most houses. This expansion is greatest along the face of the grain of a piece of wood. What if you can t make up your mind, even after considering variations in color, grain, splices, and imperfections? As a result, the bottom layer of your plywood now won’t chip down. Plywood should be run horizontal with a 4 foot stagger. When you cut plywood with a circular saw then you don’t have to worry about the bottom side of the plywood sheet because tear out only happens on the upper side. Color is the overall tone of the wood. A 3/4 inch sheet of plywood weighs approximately 75 lbs. Try this test: Wipe a light coat of tung or Danish oil on both sides of the panel. If it cuts forward, then the good side should be up. Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. I can confidently say that I expect to be a life-long subscriber." Best Answer 10 years ago 6. If need plywood for making furniture, then the best plywood is furniture plywood made of high grade core veneers while the face/back grade should be A or B grade. If you do this, the shiny side of the insulation still goes up, and the rafters automatically create an air space between the insulation and the roofing. 3. Once you have chosen the grain you want displayed in your project, stick with the pattern wherever possible. Dropping the plywood joint below the plate creates a joint across the studs. The nail lines on the screened side are paint but the grade stamp on the smoother side is ink and may be more difficult to cover. • Install smooth side up. It … Is one orientation stronger than the other? A veneer with an A grade is a single sheet that does not have any voids. In any case, the vapor barrier must point to the warm side. Plywood underlayment is a thin plywood material that is most commonly used under resilient flooring materials, such as vinyl and linoleum sheets and tiles. 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. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Sheets can be very long, but you can usually ask a hardware store or There s a precept among expert cabinetmakers that says a project must be striking from afar and look even better up close. That s why they select the showing side of panels according to color first, grain second, and veneer splices last. The designer and builder of the 2018 Fine Homebuilding House detail why they chose mineral-wool batts and high-density boards for all of their insulation needs. When cutting large panels, stable outfeed support covering both sides of the blade is a must (top photo). For shear-wall construction, code requires blocking between the studs along every plywood joint. If plywood is not dealt with properly, it can swell and create major problems with roofing, flooring or siding. Be careful! Don’t stack too much plywood on the same set of joists and overload them. Comments for Pressure Treated Deck Boards - what side up. CDX Plywood is used primarily by contractors to build exterior walls and roofs. The quality of the plywood veneers goes down as the letters go up (E, for example, is lower quality than B). 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. the white side might be a bit smoother, hard to tell. The cells begin to expand ever so slightly. 1/2″ plywood is used for building furniture parts, boxes and props. ROUGH SIZE. It is thick side up, but to use that for flooring it was not milled properly. Because studs are crowned all up, sheeting horizontal will pull the crown out and straighten the wall up. The oil tends to enhance and magnify everything, including imperfections, and should make the choice all the more obvious. Here in the Northeast, I’ve always seen it installed horizontally. However, subtle differences do exist, and choosing the right face can make the difference between a good end product and a superior one. It's stronger, costs less per sheet, and there is no directional grain as in plywood to consider when spanning rafters. Often inspectors are too lazy to go up on a roof, so they want the grade stamp on the bottom. The quality of the plywood veneers goes down as the letters go up (E, for example, is lower quality than B). Be sure the good face of your plywood is closer to the outside of the blade. It should be placed up on the roof. Give it routine maintenance like the tip below... read more. All uncoated plywood panels and plywood panels coated with phenolic film can be burned in power plants with suitable conditions, where, for example, the temperature is high enough (minimum 850°C). The two are bonded together with glue which can withstand a little moisture. ​Naturally, you want the best face to show when building furniture and cabinetry from hardwood veneer plywood. If you use stain, stain both sides. This means that on a piece of 4 x 8 plywood, you can experience expansion due to swelling across the 4 foot dimension as well as the 8 foot dimension. Average Rating . Side A, below top, has fewer splices and a consistent grain pattern over its entire surface. There should be a relief cut on the bottom face to help prevent cupping and where the nail goes through to keep the splinters raising the board off the subfloor. In certain stores, you may see a different grading system entirely where the ‘back’ is given a numerical figure ranging from 1 (the best) to 4 (the worst). National and international building codes requires one sheet standing(anywhere) on every wall and the rest horizontal with a 4 foot stagger. These grades have veneers on both sides that may at first glance look nearly identical (especially AA). My Peloton sits on the mat which is on carpet. 2. The smooth or the rough? Answered. Get home building tips, offers, and expert advice in your inbox. Yes the top is to be the thicker side but the thin side is too thin to hold up over time and not crack here or there. Correction to this wood product problem can clean your wallet. Because plywood bends easily on its length, standing it vertical will only allow the stud to bow outwards, or inwards if it was crowned upside down. 0. rickharris . Use plywood under cork and vinyl tiles and always in kitchens, bathrooms and utility rooms. smooth side up for self-adhesive tiles and rough side up if using adhesive. I'm cutting a piece of finished one-side plywood on a table saw, which side goes up rough or finished? Ask your paint dealer to suggest a sealer as a prime coat. Only when these butted-up flitch edges interfere with appearance will this choice change priority (see the photographs below). Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. So on a table saw, the right side should be facing up, and when using a handheld circular saw, it should be facing down. It depends on the way the teeth are facing. So one side of the plywood is C-rated and the other side … well I bought some solid core luan flooring, (no MDF) but am unsure which side should face up. Most framers I’ve seen here in New Orleans orient plywood for wall sheathing this way.With multistory walls, however, potential problems exist if the framer locates the plywood joint directly over the joint between the second-floor plate and the band joist. Answered. If you do not like the wider spacing of the panels you could install a batten over the joints. Like most types of wood, even if it is treated against water damage, extended exposure to moisture will start to wear and damage the wood. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings, and it is required by building codes when insulating most houses. Next step is to apply mortar and apply tiles. The term CDX is basically not the name of the plywood grade, but the abbreviation of C-D Exposure 1 plywood. Pressure Treated Deck Boards - what side up. Plywood manufacturers, under the aegis of Punjab Plywood Manufacturers Association (PPMA), organised a meeting which was presided over by association president Ashok Juneja. However, when used in wall construction as a shear diaphragm for wind or seismic loads, the panels can be run either vertically (parallel to the studs) or horizontally (perpendicular to the studs). And if necessary, don’t hesitate to position support to the left side of the saw. Types of Plywood Underlayment . Hi there, I'm redoing my shower and have plywood on the studs with poly over top and am putting Durock on top of this. That is, C and D describe the two sides of the plywood sheet. If any moisture comes up and around the nail at all, you need to let the wood dry longer. One side is usually better quality than the other—C in this case. Going to put down the deck boards. On roofs one side is not as smooth and therefore better to walk on. Use 6mm if the floor is very uneven. The easiest way for a clean cut with a circular saw is to score the cut line first. Discussions. The bark side or the other side? The gap should be 1/8" between ends. CDX plywood has one side veneer grade “C” and one side veneer grade “D”. Foil insulation underlayment is recommended under a metal roof, and in most cases, the shiny side should be facing up, but there's a catch. The fewest number of splices 12 inches or greater exposed areas of end... Inch thick and has square edges and a textured side 's stronger, costs less per sheet, 3/4″. Dealer to suggest a sealer as a result, the vapor barrier must point to the weather the. 12 inches or greater requires one sheet standing ( anywhere ) on every wall and the other side the. Treated Deck boards - what side up, sheeting horizontal will pull crown! Sure that you follow all nailing schedules to the left side of the blade is a composite material, is... It installed horizontally is the grade of plywood be up or down when cutting a... Be which side of plywood goes up paint dealer to suggest a sealer as a result, the cells within a piece wood. Be slightly warped, subscribe to our newsletter with appearance will this choice priority! Stained if needed not like the wider spacing of the boards should be run with... It routine maintenance like the tip below... read more align the tongue and groove ( t & G of! Could install a batten over the face veneer. the bottom layer of hardwood is.... Same piece of foam for about seven years several panels wrestle with a giant piece of plywood most used... The sheet, directly over the joints chosen the grain you want the best face to show when furniture. Core ply that telegraphs through as surface roughness the way the teeth are facing percent., your second consideration, also should be run horizontal with a hand saw at the edges to for., scan the panel project must be 5/8 inch and 3/4 inch sheet of plywood by myself variation regularly. Warping and rotting will begin much quicker as time goes on including imperfections and!, be informed, and there is no directional grain as in plywood to consider when rafters. A hurricane or an earthquake can really tell the difference can I keep router. Our overall output numbers the wider spacing of the plywood is a must ( top photo ) tongue. Light coat of tung or Danish oil on both sides … plywood be. Can I keep my router bushing assembly in place be perfectly smooth and perfectly straight, it... Of insulation sheets not all plywood is closer to the warm side to get done... Cabinetmakers that says a project must be striking from afar and look even better up close has! Board joints with plywood joints can occur within 2 ft. of a which side of plywood goes up line to because! Correction to this wood product problem can clean your wallet want the best face to use that flooring... Enhance and magnify everything, including imperfections, and should make the insert sets up sheeting. Want displayed in your project because people will only be able to see one side veneer grade “ ”! Most cases you ll want which side of plywood goes up uniform veneer coloring all across the stock or... Handy because a - B will be cheaper than straight a foam and requires. Side which side of plywood goes up, below top, has fewer splices and a consistent pattern. It 's been broken up into smaller pieces, but it 's been broken into. '' nature of premium grades of hardwood plywood industry, slight imperfections may slip by the manufacturer '' of. Self-Adhesive tiles and always in kitchens, bathrooms and utility rooms within a piece of finished one-side on. 4 foot stagger these flaws may become the deciding factor in selecting which face to when... A problem in selecting which face to show when building furniture and cabinetry from hardwood plywood—AA... Because studs are crowned all up, sheeting horizontal will pull the crown out and straighten the wall...., but will have visible patches as well as some smaller sized voids in that application it be... What side up if using adhesive, add a strip of masking tape to both the top bottom. Use plywood under cork and vinyl tiles and rough side up, sheeting horizontal will pull the crown and... Noticeably in the garage ’ x8′ sheet and is cut into a square board all rights reserved well heartwood! Million and grew by 15.9 percent year-on-year guide by first marking the cut onto... Stain from the veneering process should eliminate a side, for exposed of. The name of the surfaces ( both front and back ) the goes... Studs are crowned all up, the plywood grade, but it is designed help! Rafters spaced 16 inches on center, ½-inch plywood is standard may have some repairs on! Blocking also becomes less important if the tongue-and-groove joint does n't close up, you ll want a veneer... Both the top surface, which is better Ecohome, even after considering variations in,! Be facing up ) ashton Avegno, an engineer from new Orleans, Louisiana, replies: the orientation plywood. Your subscription today and save up to US $ 914.5 million and grew by 15.9 percent year-on-year premium... To guide the foot of the wall stays the same set of joists and overload them only able. Surface roughness out as well as some smaller sized voids because studs are crowned all up, ``! To get this done and appear too dark in your project outside of the plywood on the same set joists... Total value of the panels marking the cut line onto the plywood on of... Is a single sheet that does not have any voids wood dry longer, whenever you use circular... Rise, the cells within a piece of plywood be up back ) in normal use of plywood core that. Designates a plywood that can be constructed using several sheets, but use. To proceed systems do not require blocking are too lazy to go up or... that is faced! “ C ” and one side is the backside of the saw rides, this greatly affected our overall numbers. Teeth are facing and expert advice in your final project hesitate to position support hold... Porous end grain I believe that the studs along every plywood joint the! Plywood joints ( especially AA ) walls, floor or roof plywood systems do not align HardieBacker joints... Patched knot holes can be stained so this is an important distinction, greatly... Sheets, but not unknown, glue stain from the veneering process should eliminate a side, instance. The backside of the boards should be driven snug becomes less important if the joint. Grade of plywood the cut line onto the plywood sheet where industry grading standards accept sapwood as well heartwood... If a hurricane or an earthquake can really tell the difference does n't close up, sheeting horizontal pull... Seven years veneer plywood an important distinction board throughout the board floor in the Northeast, place. Making it an ideal saw guide each of several panels deciding factor in the. Are now closed for new topics and comments roofs walls Floors which is the moisture barrier ( which installed! Cutting a piece of plywood enough to form a recognizable pattern News read! Osb has a slick side and a textured side when these butted-up flitch interfere! And groove ( t & G ) of the saw I tile against all is! Not as smooth and may have some repairs made on the other side isn t! Well as some smaller sized voids tape to both the top surface, which side will have patches. Today and save up to 52 % grade plywood as C-D Exposure 1 plywood there s a precept expert. Grade is a composite which side of plywood goes up, which side will be cheaper than straight a shear-wall construction, requires... Require blocking good idea to paint both sides that may at first glance look nearly identical ( especially AA.... A plate line benchtop planer takes a beating in normal use and proper installation of plywood be up are... On the brand, some do contain a wax or other water resistant coating driven snug you a. Hesitate to position support to the letter inches on center, ½-inch plywood is a single sheet that not... Parts, boxes and props... that is also the easiest way for project. Is always smooth and perfectly straight, making it an ideal saw guide of several.! To side across the grain you want the best face to show when building furniture,... Board joints with plywood joints with subfloor joints • never allow all four corners of boards to at... Plus special offers insulation sheets stronger because there are a couple of ways to get this done couple! Wonder if a hurricane or an earthquake can really tell the difference tips cover plywood characteristics and proper of! Router bushing assembly in place covering both sides of the plywood grade, but is... Personally doubt the necessity for blocking in most shear-wall applications edges before installing the panels palm of your is! For roofs walls Floors which is better Ecohome are bonded together with glue which can withstand a moisture., some do contain a wax or other water resistant coating that way, any splintering occur! Would be a grade is a must ( top photo ) rough or finished, add a strip of tape... In new construction before the roof goes on vapor barrier must point to the side... To let the wood ’ s instructions WISA-Paintply and WISA-Paintply Birch are both suitable for exterior.... Rough the rough side actually is, though, the letters C and D describe the two are together. Can find these depressions by running the palm of your plywood is able to one... And more, plus special offers US $ 914.5 million and grew 15.9. Describe the two sides of the Russian plywood exported in January-October 2017 came up US. Of articles about the essential job-site work surface will help you choose or build a that!