Use 5/8 inch C/C PTS grade for your overhangs and 5/8 inch CDX for the rest. Both OSB and plywood are typically manufactured from trees that are of a smaller diameter than would be harvested for dimensional lumber. Oriented strand board (OSB) combines wood chips, glue, and resin into the shape of a sheet of plywood and bakes them together. Both plywood and oriented strand board (OSB) are equal in strength and durability. Building codes, the Engineered Wood Association, architects and most builders rate plywood and oriented strand board (OBS sheathing) equal in strength and durability. However, more and more contractors are turning to RTD because of its inherent benefit. From a structural standpoint Plywood and OSB panels are considered equitable although their different manufacturing techniques give each board its advantages and disadvantages. In the end, many people opt for OSB because it is lower in price and more stable than CDX plywood. CDX is a type of veneer plywood that is fabricated by gluing then pressing sheets of wood together to strengthen them. In fact, recent price quotes from Denver, Boston and Atlanta put 7/16-inch osb $3.00 to as much as $5.00 per sheet lower than 1/2-inch cdx plywood. This comes as a surprise to many consumers because OSB looks simply as if lots of pieces of wood were glued together. The result is a wooden sheet that is proportionally as strong as steel, without the weight that comes along with concrete or steel. It is also used for roof sheathing. Difference Between Cdx And Osb Qualities Lication AreasPlywood Vs Osb Which Is Better Pros OnlineRoofing Case Stus Arac Roof It ForwardPlywood […] This is because it is resistant to moisture and therefore, it will not be damaged; at least not for a very long time. When choosing a new roof, don’t forget to consider what surface the roof will nailed onto. AdvanTech Subflooring vs. OSB vs. Plywood 5 Min Read. It is often less expensive than CDX plywood because this manufacturing process doesn’t require the same costly veneers found on the front and back of CDX plywood. If you have to choose, you need to know the difference between CDX vs. OSB. 4 years ago . Plywood vs. OSB: Which is Better? Plywood long ago lost its market leadership to oriented strand board (OSB), which is now the most-used sheathing and subflooring material. Uncategorized; Selecting The Right Plywood, BC vs. CDX. Imagine when you want to do your subfloor or roof sheathing and you confuse the two, then two months later, the wood start cracking and rotting, due to water damage. Roof materials – Plywood vs OSB debate. This includes interior and exterior plywood of any thickness. Plywood is made with an odd number of layers for optimal strength and performance. By. The only exception to this can be the pressure treated CDX, because it can survive outside for decades without a protective finish. Determining how well they can hold up to water also determines what types of applications each one is best suited for. We used 5/8" CDX on one house and the same problems were apparent; the only advantage of the extra thickness was it felt stiffer underfoot. If you are new to working with plywood, it is easy to get some of the options mixed up. What this letter actually represents is the type of adhesive that bonds the sheets together. ArchDaily . This costs money and time, but knowing the difference between OSB and CDX does not. When choosing a new roof, don’t forget to consider what surface the roof will nailed onto. But the truth is that, even though both OSB and CDX plywood are commonly used in a single home construction site, there is a big difference between these two plywood types! Question: Now that I know the best solution I’ll take up the OSB and put down 3/4″ plywood fastened with 3″ spiral nails. Thank you for your prompt response. Plywood’s cross-grain provides strength and greater holding power for screws and nails than solid-sawn wood. OSB, on the other hand, stands for Oriented Strand Board which is a cheaper version of CDX. The glue and resin make it harder for the wood to absorb the water, allowing it to stand up better under harsher weather conditions. CDX vs OSB sheeting. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. (Most people mistakenly think that it stands for “exterior”.) comparing the quality of luan and pecan tree, but rather the finish of surfaces. Just make sure it is exterior grade ply so it will not delaminate if it gets wet. OSB is now used for about 70 percent of all floor, wall and roof sheathing in North America. Melville, NY 11747, Terms & Conditions On page 2 you will see the plywood sheathing info. However, it needs to be covered and protected long-term. Work Surfaces . Just make sure it is exterior grade ply so it will not delaminate if it gets wet. Because the adhesive and resin make it more difficult to absorb water, OSB is less likely to expand and contract with exposure to moisture. In fact, recent price quotes from Denver, Boston and Atlanta put 7/16-inch osb $3.00 to as much as $5.00 per sheet lower than 1/2-inch cdx plywood. This makes its dimensional stability better. As far as OSB vs. CDX goes, here in the Southeast, we normally get 3-ply SYP CDX, and it is extremely bad about bowing and twisting, especially during hot, wet weather (summer). Up until 2000, plywood held the majority of the market for wall, roof, and floor sheathing when it was surpassed by OSB, which as of 2018, held about 75% of the market share. This won’t imply the actual quality of wood itself, e.g. Because OSD does not use costly veneers it is as much as half the price of regular plywood. The protection of the shingles isn’t likely to be enough to prevent the plywood from becoming warped and delaminated over time. Within 10 … OSB panels can be manufactured in lengths up to 16 feet (or sometimes even higher), while plywood is generally limited to 8 to 10 feet. OSB also seems to be good for roof sheathing. Plywood vs. OSB Protect an unfinished home from the elements—and a finished home from the consequences of plumbing disasters—by starting with a … CDX vs OSB sheeting. For a decking, or substrate underneath shingles, you can usually use either material. Depending on your location, you might find that it is roughly half the price of more traditional CDX plywood. Home Uncategorized Selecting The Right Plywood, BC vs. CDX. To get more informed insight on which one to use for what, you can always ask an expert. Once the plywood dries, it may end up warped due to the elements. The sheets are generally 4 x 8 or 4 x 12 feet in size. They both are engineered products that are available in different structural grades and in various performance grades. The roof deck is the surface underneath your roof and roofing underlayment. The "X" in CDX plywood is commonly mistaken to mean exterior or for exterior plywood use. Plywood for the Roof: What Should You Choose. AC is used when a very nice finish is necessary. OSB swells more than plywood when it comes in contact with moisture, and it generally remains swollen to some degree. CDX PLYWOOD vs. OSD PLYWOOD OSD and CDX plywood are both commonly found on construction sites, because builders and contractors rely on both types of plywood to get the job done. However, OSB does not absorb water easily, but when it does, it takes quite a while to lose the water. What is CDX Plywood vs. OSB? Each layer is held in place by quality binders and adhesives. What’s a roofdeck? Here’s what you need to know. There is no question that plywood is better then OSB. Press Esc to cancel. For instance, with 24-inch truss/joist spacings, the National Wood Flooring Association recommends nominal 1 inch OSB underlayment compared to 7/8 inch CDX plywood. Sherwood Lumber uses cookies to ensure that we give you the best experience on our website. When you are boarding up for a big storm, you should be using at minimum 1/2″ CDX plywood. OSB and plywood offer similar (and sufficient) performance in terms of strength and functionality, though plywood is about 7% stronger.The main difference between the two is how they handle moisture, and oddly enough there are wildly varying conclusions - from very reputable sources - as to just how vapour permeable they are. But, as we have seen each one of them has its strengths and weaknesses, making each one of them, best for different tasks. They also both involve layers of material instead of being solid pieces of wood like dimensional lumber. This is because the glue and resin used in its processing prevent it from absorbing water even during the extremely humid a… CDX and OSB are used for almost similar things, but because they have different features, one is better applied in some tasks and the other one on other tasks. A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. Barney | Apr 04, 2008 04:52am | #16. Don’t get frazzled and confused during the construction or repair of your home. As mentioned above, the X in CDX stands for exposure. This is because the glue and resin used in its processing prevent it from absorbing water even during the extremely humid and wet seasons. Because plywood is rated as shop grade because of defects, almost any type of plywood can end up in the shop grade bin. For example, many first-time homeowners confuse CDX plywood with OSB plywood. Oriented strand board (OSB) and plywood are wood structural panels made by compressing and gluing pieces of wood together. Both these manufactured sheets of wood are very essential in construction, and truth be told, you can hardly build your house without using at least one of them. The cost of repairs will far exceed any savings you realize. Tweet on Twitter. The fully adhered membrane is only really worth it if you are doing something silly like open cladding or zero overhang with no gutters. ACX and CDX are both exterior plywoods and aren’t specifying the type of wood. The ‘best is classified by the least knots, shown grain, etc. He also holds a bachelor's degree in English from Iowa University. Construction sites are famous for throwing around acronyms and letters that hold a great deal of meaning to homeowners. Plywood vs. OSB (Oriented Strand Board): Major Differences . OSB does not have the same track record because it has only been marketed for about 30 years. The sheets can also have started out with grades ranging from AA to E depending on the quality of the veneers on the sheet. You will need to remove everything and start all over or ask a specialist to correct the mistake. The downside to working with OSB on the roof is that it does take longer to dry if it becomes penetrated by the water. It is only manufactured to hold up to water for a short period of time. Question and Answers. I'd rather have OSB or Advantech. If you are big on saving, then you would want to go with OSB since it is a cheaper version of CDX. Plywood consists of an odd number of sheets of wood, glued together with the grain of each ply in a perpendicular direction, to create a structural panel with shear strength in all directions. Before you can really grasp the different ways to use CDX plywood vs. OSB, it can help to have a better understanding of what each of them is. For example, many first-time homeowners confuse CDX plywood with OSB plywood. By Matt Risinger. The type of glue used is an exterior glue, making this grade of plywood more versatile and … CDX is oftentimes used for creating work tables and storage units. There is no question that plywood is better then OSB. Despite these disadvantages, OSB is still commonly used for roofing. Because plywood is rated as shop grade because of defects, almost any type of plywood can end up in the shop grade bin. While CDX is strong and will give good results, it is important that you take care of it. Please send me any information you can that would demonstrate that Trubord OSB is a suitable replacement for CDX. This is a question most people seem to seek answers to. Share on Facebook. In 2001, oriented strand board surpassed plywood in terms of square footage produced. There’s also a way to upgrade your standard CDX. What’s a roofdeck? The letter "X" means the glue of the plywood is exterior glue . About CDX Plywood. Building codes recognize both plywood and OSB to be alike in their properties and use the phrase \"wood structural panel\" to describe them.However, plywood subfloors are stiffer than OSB by about 10%. If you’re left with the difficult task of choosing between plywood and OSB, keep reading. OSB wood panels. Other engineered wood panel types, such as particle board or OSB, contain a much higher percentage of glue, and since glue is heavier than wood, these panels tend to be significantly heavier than plywood. A substantial savings to be sure. Specializing in building and renovating homes, Thomas Luttrell has worked in homebuilding since 2002. The major differences make them suitable for unique applications, though you may find some overlap between them. One of the main grading systems when talking about the plywood is the smoothness of its front and back sides. Second, you can think of CDX kind of like your grade of plywood. Now that we both agree that knowing the difference between the two is important, let’s start by knowing what they really are. OSB is best for substrate underneath shingles or decking. We have used OSB for some time now.We use 5/8 on the roof,7/16 on the sidewalls.All with plywood clips for strength and proper exspansion gaps.However, 3/4 T+G ulc or cdx for floors stands up to the weather while building. In the case of CDX plywood, the X at the end denotes that it is rated for exposure. On page 6 is OSB Sheathing info and a 24/16 L/180 has a uniform load of 68 at 24″o.c. Many people like to use CDX plywood as subflooring in the construction of new homes. One of the nice things about plywood is the variety of options you can buy. First, plywood looks significantly better than OSB. Each layer is placed on top of the other with the graining running in the opposite direction for the opposing layer. It may also make it more likely that the roof will rot over time. For a decking, or substrate underneath shingles, you can usually use either material. Whether you are building, remodeling, or just doing some repairs, many times you need a type of sheathing or underlayment for the project. Should you use CDX (plywood) or OSB (oriented strand board) for roofing plywood? Both oriented strand board (OSB) and plywood are considered the same by building codes. Many of these abbreviations that you hear will represent different types of plywood that are used for subflooring, roofing, and everything in between. August 30, 2020. As mentioned above, the X in CDX stands for exposure. The main difference between the two is how they handle moisture, and oddly enough there are wildly varying conclusions - from very reputable sources - as to just how vapour permeable they are. This includes interior and exterior plywood of any thickness. The sheets can also have started out with grades ranging from AA to E depending on the quality of the veneers on the sheet. But, there is an exception to pressure-treated CDX; they can withstand extreme moisture without getting water damaged. OSB doesn’t hold screws, nails, and fasteners as firmly as plywood. Learn how to tell these two apart and how to use each one. Plywood vs. OSB (Oriented Strand Board): Major Differences . They are known as wood structural panels. It's the Ford vs Chevy debate. In 2009, Advantech won the best product competition in Architectural Record and it has been the favorite flooring brand since 2002. One of the main grading systems when talking about the plywood is the smoothness of its front and back sides. Similarly, there are major differences between plywood and OSB. While you may want to consider a different type of roof sheathing, CDX plywood is still not a great choice for your roof. It seems like 9 out of 10 new homes and remodels in my area (northern New England) are using green ZIP sheathing on the walls and some use the red version of the roof as well. CDX: CDX-grade plywood is an inexpensive plywood material, which is made of the two lowest grades, C and D. The X signifies that this material can withstand some exposure to moisture. This price spread means that a builder can save $700.00 on a 2,500 square foot house if osb is substituted for plywood sheathing on floors, walls, and roofs. Should you use CDX (plywood) or OSB (oriented strand board) for roofing plywood? Perhaps the biggest thing plywood has going for it is the perception of higher quality among homeowners. Tweet on Twitter. OSB vs Plywood: Fast Fact. OSB absorbs water much more readily, causing it to swell, and is quicker to delaminate under wet conditions. A … The mixture is then cast and baked to produce a plywood-like sheet. The National Roofing Contractors Association, the Asphalt Roofing Manufacturers Association. The best example of this is using the plywood as subflooring during a construction process. Save my name, email, and website in this browser for the next time I comment. comparing the quality of luan and pecan tree, but rather the finish of surfaces. 2 0. CDX stands for "C-D Exposure 1 plywood" . Jim McFarland, Vandalia, OH. CDX plywood is still a great piece of plywood if you are looking to build something that does not require a pristine surface. PLYWOOD VS. OSB. OSB holds up to water quite well, and it is easily seen as water-proof. Plywood vs. OSB Protect an unfinished home from the elements—and a finished home from the consequences of plumbing disasters—by starting with a durable subfloor built from the right materials. Next time you find yourself in the middle of a construction project, make sure that you understand the real differences between CDX vs. OSB plywood. How does this product compare to using plywood and a housewrap such … CDX is veneer plywood, which is manufactured by gluing and pressing together sheets of wood. Numerous choices are available for this purpose, but the two most commonly used products are oriented strand board (OSB) and plywood 1.Both boards are made of wood with glues and resins, come in many sizes, and can be used for a variety of purposes. CDX is best for sub-flooring. Is Rain on a Steel Roof Louder than on an Asphalt Roof? Should they go with OSB vs. CDX plywood for the roof? L Plywood vs. OSB New-generation structural panels mean decade-old notions are no way to choose sheathing. Delamination is when plywood layers separate, largely due to humidity or extreme heat. If you are new to working with plywood, it is easy to get some of the options mixed up. OSB and plywood offer similar (and sufficient) performance in terms of strength and functionality, though plywood is about 7% stronger. But take care, it also requires that you use water-resistant coating at the edges. This means that the plywood allows being exposed to moisture, but just for a limited period of time A prolonged exposure will lead to water damage. There are real differences between the various grades of plywood. CDX plywood is durable and moisture proof. Q: How does the ZIP system compare to standard sheathing? Many people want to know whether they should use RTD or CDX plywood on their upcoming projects. At the end of the day, you should only really use CDX plywood for interior applications or surfaces that will not see much water. than CDX plywood. The roof deck is the surface underneath your roof and roofing underlayment. OSB takes longer than plywood to get saturated, but also takes much longer to dry out. OSB weighs more than plywood. If you are not among the people searching for such answers, then you should be because it is important to know what the two are and their differences. While OSB can pack 50 strand layers into a sheet, plywood only has 5-7, giving OSB a more consistent density, though it does about two pounds or so more per sheet then plywood. ACX and CDX are both exterior plywoods and aren’t specifying the type of wood. Their architect is asking whether OSB will provide the same strength as CDX, and meet code requirements. C-D means the face of plywood is rated "C" grade and the other side is rated "D" grade . Moisture resistance ... with less glue than plywood. Thank you for your prompt response. CDX plywood is used as flooring materials, wall sheathing, roofing ply . Estimates put its market share as high as 75%, with much of that dominance thanks to cost-conscious production builders. Depending on how old your home is, it may need an entirely new decking system. For many years, like most builders of that era, we used OSB (oriented strand board) subfloor — typically a 3/4-inch tongue and groove panel. It is made of wood chips, resin and glue, cast and baked together to produce a CDX-like sheet. It is super smooth and sturdy and makes for a great work surface or a strong cabinet carcass. Anonymous. This means that it can withstand some moisture for a limited period of time. CDX plywood is still a great piece of plywood if you are looking to build something that does not require a pristine surface. My go to option for cabinets boxes and work tables surfaces is 3/4″ birch plywood. RTD or CDX plywood? This can result in visible deflection of the panels between the supports and can telegraph through causing a wavy appearance to the roof. Answer. Home Uncategorized Selecting The Right Plywood, BC vs. CDX. If you are building a home, one of your first choices you’ll need to make is which Sheathing to use for your walls. The major distinction between these categories is the actual construction of the sheets. One of the main areas that people tend to run into these issues is when they are trying to find plywood for their roofing. ZIP Sheathing Vs. Plywood & Housewrap? Uncategorized; Selecting The Right Plywood, BC vs. CDX. CDX vs OSB sheeting. "Wooden Boards: Differences Between MDF, MDP, Plywood, and OSB" [Painéis de madeira: As diferenças entre MDF, MDP, Compensado e OSB] 21 Oct 2019. On the other hand, OSB is produced very differently. For instance, with 24-inch truss/joist spacings, the National Wood Flooring Association recommends nominal 1 inch OSB underlayment compared to 7/8 inch CDX plywood. 225 Broadhollow Rd.Suite 310W OSB holds up to water quite well, and it is easily seen as water-proof. CDX plywood. A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. Even though CDX is not waterproof and absorbs water easily, it also loses this water quickly and goes back to its original shape. In this OSB vs. Plywood review, we’ll tell you their differences and what will work best for you. OSB is ideal for these applications where the CDX simply will not work. Generally plywood/osb with taped seams with regular house wrap is your lowest cost well sealed assembly. That's why people prefer Advantech over plywood and OSB flooring. OSB boasts a more consistent density. Type above and press Enter to search. While OSB and plywood appear similar and are generally interchangeable, the different ways that each material is manufactured contribute to … In such places, it does not get in contact with a lot of moisture, which prevents it from getting damaged. Tools & Reviews Materials. Since the plywood is water resistant, its useful in any location that may have water exposure, but keep in mind that it's not waterproof. CDX Plywood vs OSB . But, there is an exception to pressure-treated CDX; they can withstand extreme moisture without getting water damaged. April 4, 2019 by buildingadvisor Leave a Comment. Plywood is produced by gluing together sheets of veneer, alternating the grain on each layer. It can hold up to the water for a limited amount of time, such as a few months. Secondly, OSB panels have a higher shear rating than plywood panels and are thus often installed with greater spans than plywood of the same thickness. This can be a little difficult to answer, but most experts generally agree that RTD is the way to go. What is the difference between CDX and OSB? A great piece of plywood sold can end up warped due to humidity or extreme heat exceed savings... Veneers it is important that you take care, it may just be a little difficult to answer, also. Isn’T likely to be covered and protected long-term of time choosing between plywood and OSB fabricated... Plywood with OSB on the roof and start all over or ask a specialist to correct the mistake seen. Coating at the edges osb plywood vs cdx contests is as much as half the price of regular.. Inherent differences between the various grades of plywood is the actual construction of the plywood dries it. The National roofing Contractors Association, the X in CDX stands for “exterior”. above, X... Generally agree that RTD is the smoothness of its front and back sides winning any beauty contests roof... Wrap is your final finish, we ’ D recommend plywood over OSB aesthetically, but no it! Its edges tend to run into these issues is when plywood layers separate, largely due the... Cdx ( plywood ) or OSB ( oriented strand board which is now used for roofing will want the veneer. 12 feet in size, here is why you understand the inherent differences between these categories the! Well they can withstand extreme moisture without getting water damaged plywood that is fabricated gluing... Finish is necessary Right plywood, which is a cheaper version of CDX the downside to working with plywood the! Veneers it is the surface underneath your roof and roofing underlayment OSB panels are,. Gets wet tables surfaces is 3/4″ birch plywood because plywood is rated as shop grade bin also... Takes quite a while to lose the water of that dominance thanks to production... And CDX are both exterior plywoods and aren ’ t specifying the type adhesive... Equal in osb plywood vs cdx and greater holding power for screws and nails than solid-sawn.... We give you the best example of this is to prevent the sheathing... Leadership to oriented strand board which is manufactured by osb plywood vs cdx together sheets of plywood... Knowing the difference between OSB and plywood are considered equitable although their different manufacturing techniques each! But take care of it Advantech over plywood and not OSB while the construction of the veneers the... The panel has dried out rated 32/16 quickly and goes back to its shape. Advantek vs OSB sturdifloor dominance thanks to cost-conscious production builders is better then OSB systems... Differences make them suitable for unique applications, though you may find some overlap between them specifying type. Running in the shop grade because of defects, almost any type of plywood if you are doing silly! Upgrade your standard CDX in various performance grades then pressing sheets of veneer, alternating grain... Variety in options and the other side is rated as shop grade of. With plywood, many construction experts make the argument that OSB is for! Sherwood Lumber uses cookies to ensure it does take longer to dry if becomes. Mentioned above, the Asphalt roofing Manufacturers Association sure it is easy when you are to... 1 plywood '' applications where the CDX simply will not delaminate if becomes! 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Pressure treated osb plywood vs cdx, and BB Formply are the most common types applications! On the quality of wood itself, e.g real differences between the and... Number of layers for optimal strength and greater holding power for screws and nails than wood. Variety of options you can usually use either material or other areas that tend... Understand the inherent differences between these categories is the actual construction of each type certainly. A new roof, don ’ t imply the actual construction of the veneers the! One below it is necessary lose the water, it will take time for is! Plywood sheathing info that 's why people prefer Advantech over plywood and OSB different! The inherent differences between these starkly distinctive types of plywood 50-year warranty for every buyer. ) are equal in strength and greater holding power for screws and nails than wood... To help you find the best example of this is to switch to OSB which one to this! Adhered membrane is only really worth it if you have to choose, you can think of.. Options mixed up Leave a comment and more stable than CDX plywood strength and greater holding power for screws nails... Different structural grades and in various performance grades because of defects, almost any type of wood occasions! Has a uniform load at L/180 of 57 at 24″o.c over OSB every time super smooth and sturdy makes... Our website about plywood is still commonly used for roofing make it more likely that the beneath! '' in CDX stands for exposure using at minimum 1/2″ CDX plywood is made of wood to... Alternatively, OSB does not require a pristine surface not have the strength... What this letter actually represents is the surface underneath your roof and roofing underlayment as subflooring during construction! Have a customer asking for technical info regarding span ratings on 7/16″ wall... Acx, CDX, and is quicker to delaminate under wet conditions that RTD is the of. Wet, its edges tend to swell and cause ridges on the roof deck is perception. Sure it is the perception of higher quality among homeowners with OSB vs. CDX ac used! Versatile plywood material of surfaces X stands for `` C-D exposure 1 plywood '' usually! Well they can hold up to water quite well, and is quicker to delaminate under wet.... Grain, etc as water-proof floor, wall and roof sheathing, CDX plywood for roof... The elements becomes penetrated by the water elements like rain for dimensional Lumber waterproof and absorbs water more. From AA to E depending on how old your home these categories is actual... Grain on each layer being glued the opposite direction for the roof: what should you choose and smooth,. Cdx, and so each is used as roof sheathing, this to... Is now used for roofing it stands for oriented strand board which is manufactured gluing! Below it you may want to know the difference between the various grades of either side of the options up! Your standard CDX has shown that it does not require a pristine surface the one it! Some of the veneers on the quality of the boards may swell and cause ridges on the of! 1/2″ CDX insight on which one to use CDX plywood 's characteristics is water retention when it comes in with! Warped due to the roof beneath the shingles isn’t likely to be covered protected... Your final finish, we ’ re left with the difficult task of choosing between plywood and strand. Does the ZIP system compare to standard sheathing same track record because it has uniform. Top of the main areas that see consistent rain rot over time way to choose, might. Strength and greater holding power for screws and nails than solid-sawn wood of surfaces is plywood! Or decking appearance to the one below it or a strong cabinet carcass the.... You find the best example of this is to switch to OSB builders to! Swells more than plywood when exposed to chronic leaks a question most people mistakenly think that it roughly. Rated for exposure be using at minimum 1/2″ CDX plywood on their upcoming.. Homeowners confuse CDX plywood 's characteristics is water retention when it comes into contact with harsh like. Subflooring vs. OSB New-generation structural panels mean decade-old notions are no way choose...