It's the Ford vs Chevy debate. Delamination is when plywood layers separate, largely due to humidity or extreme heat. You don't want to have to come back in a few years and rip up your roof to repair it just to save a few bucks today. This means that it can withstand some moisture for a limited period of time. The only exception to this can be the pressure treated CDX, because it can survive outside for decades without a protective finish. OSD plywood (which is also commonly known as OSB or oriented strand board) is produced by binding wood chips together with a mix of glue and resin. Once the plywood dries, it may end up warped due to the elements. Sherwood Lumber uses cookies to ensure that we give you the best experience on our website. The fully adhered membrane is only really worth it if you are doing something silly like open cladding or zero overhang with no gutters. Osb vs plywood pros cons cdx vs osb what is the difference osb vs plywood which should you gp plytanium plywood sheathing osb or plywood for roofs walls framing osb vs plywood whats the. Nowadays this flooring also comes with a 50-year warranty for every new buyer. Both oriented strand board (OSB) and plywood are considered the same by building codes. CDX plywood is used as flooring materials, wall sheathing, roofing ply . 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. When choosing a new roof, don’t forget to consider what surface the roof will nailed onto. 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. While OSB and plywood appear similar and are generally interchangeable, the different ways that each material is manufactured contribute to … The National Roofing Contractors Association and the Asphalt Roofing Manufacturers Association both gave the thumbs-up of approval to use OSB for roof sheathing, provided that each sheet has approval from the APA – Engineered Wood Association. Difference Between Cdx And Osb Qualities Lication AreasPlywood Vs Osb Which Is Better Pros OnlineRoofing Case Stus Arac Roof It ForwardPlywood […] On page 2 you will see the plywood sheathing info. AC is used when a very nice finish is necessary. Because OSD does not use costly veneers it is as much as half the price of regular plywood. CDX plywood is stronger than OSB but cost more. One of the nice things about plywood is the variety of options you can buy. CDX is used as an upgrade over OSB aesthetically, but no, it’s not winning any beauty contests. Thank you for your prompt response. Plywood vs. OSB: Which is Better? The best example of this is using the plywood as subflooring during a construction process. CDX plywood is created by bundling layers of wood together. Making the right choice is easy when you understand the inherent differences between these starkly distinctive types of materials! RTD or CDX plywood? comparing the quality of luan and pecan tree, but rather the finish of surfaces. It is only manufactured to hold up to water for a short period of time. This is because the glue and resin used in its processing prevent it from absorbing water even during the extremely humid a… Melville, NY 11747, Terms & Conditions It is also used for roof sheathing. It is made of wood chips, resin and glue, cast and baked together to produce a CDX-like sheet. Barney | Apr 04, 2008 04:52am | #16. They are known as wood structural panels. C-D means the face of plywood is rated "C" grade and the other side is rated "D" grade . CDX plywood is still a great piece of plywood if you are looking to build something that does not require a pristine surface. Since it will never be visible, it may just be a waste of money. In 2009, Advantech won the best product competition in Architectural Record and it has been the favorite flooring brand since 2002. Similarly, there are major differences between plywood and OSB. To get more informed insight on which one to use for what, you can always ask an expert. While some people do prefer to go with traditional plywood, many construction experts make the argument that OSB is better for roofing. However, OSB does not absorb water easily, but when it does, it takes quite a while to lose the water. Trubord 7/16 is rated 24/16 and 15/32 and 1/2 are rated 32/16. I'd rather have OSB or Advantech. The sheets can also have started out with grades ranging from AA to E depending on the quality of the veneers on the sheet. 4 years ago . This can result in visible deflection of the panels between the supports and can telegraph through causing a wavy appearance to the roof. This includes interior and exterior plywood of any thickness. Answer. 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. OSB vs Plywood: Fast Fact. What is CDX Plywood vs. OSB? What is the difference between CDX and OSB? Use 5/8 inch C/C PTS grade for your overhangs and 5/8 inch CDX for the rest. OSB also seems to be good for roof sheathing. This can be a little difficult to answer, but most experts generally agree that RTD is the way to go. CDX plywood is durable and moisture proof. Question and Answers. Despite these disadvantages, OSB is still commonly used for roofing. Anonymous. While the construction of each type is certainly different, that’s not the only difference between the two sheets. Construction sites are famous for throwing around acronyms and letters that hold a great deal of meaning to homeowners. The sheets are generally 4 x 8 or 4 x 12 feet in size. This provides an inherent system of checks and balances that makes plywood a relatively stable material. They also both involve layers of material instead of being solid pieces of wood like dimensional lumber. As mentioned above, the X in CDX stands for exposure. I recommend that all roofdecks, especially in moist climates like Seattle, are CDX plywood and not OSB. That's why people prefer Advantech over plywood and OSB flooring. Think about how often panels get dragged on their edges across a truck bed or across the floor deck in the process of installing them. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks. Osb vs plywood pros cons cdx vs osb what is the difference osb vs plywood which should you gp plytanium plywood sheathing osb or plywood for roofs walls framing osb vs plywood whats the. OSB does not provide adequate protection against fast moving storm debris. CDX Plywood vs OSB . CDX plywood is created by bundling layers of wood together. Each of these materials has its own unique properties and qualities, and so each is used in specific applications. OSB is ideal for these applications where the CDX simply will not work. A substantial savings to be sure. It may also make it more likely that the roof will rot over time. August 30, 2020. Just make sure it is exterior grade ply so it will not delaminate if it gets wet. The "X" in CDX plywood is commonly mistaken to mean exterior or for exterior plywood use. Plywood vs. OSB (Oriented Strand Board): Major Differences . OSB wood panels. than CDX plywood. ArchDaily . One of the main areas that people tend to run into these issues is when they are trying to find plywood for their roofing. The roof deck is the surface underneath your roof and roofing underlayment. Home Uncategorized Selecting The Right Plywood, BC vs. CDX. However, it needs to be covered and protected long-term. 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. By Matt Risinger. When choosing a new roof, don’t forget to consider what surface the roof will nailed onto. In 2001, oriented strand board surpassed plywood in terms of square footage produced. This makes its dimensional stability better. Moisture resistance ... with less glue than plywood. In the end, many people opt for OSB because it is lower in price and more stable than CDX plywood. 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. Many of these abbreviations that you hear will represent different types of plywood that are used for subflooring, roofing, and everything in between. It can hold up to the water for a limited amount of time, such as a few months. CDX is a type of veneer plywood that is fabricated by gluing then pressing sheets of wood together to strengthen them. 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. Now that we both agree that knowing the difference between the two is important, let’s start by knowing what they really are. Many people want to know whether they should use RTD or CDX plywood on their upcoming projects. Building codes, the Engineered Wood Association, architects and most builders rate plywood and oriented strand board (OBS sheathing) equal in strength and durability. He also holds a bachelor's degree in English from Iowa University. There is no question that plywood is better then OSB. 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. The cost of repairs will far exceed any savings you realize. Use 5/8 inch C/C PTS grade for your overhangs and 5/8 inch CDX for the rest. Should they go with OSB vs. CDX plywood for the roof? The major distinction between these categories is the actual construction of the sheets. OSB boasts a more consistent density. Pay the extra money and get the better product. (Most people mistakenly think that it stands for “exterior”.) In 2001, oriented strand board surpassed plywood in terms of square footage produced. Tools & Reviews Materials. 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%. On the other hand, OSB is produced very differently. But, as we have seen each one of them has its strengths and weaknesses, making each one of them, best for different tasks. However, you will want the finished veneer of CDX for projects like cabinets and furniture. If you’re left with the difficult task of choosing between plywood and OSB, keep reading. L Plywood vs. OSB New-generation structural panels mean decade-old notions are no way to choose sheathing. What this letter actually represents is the type of adhesive that bonds the sheets together. Furthermore, when OSB gets wet, its edges tend to swell and stay swollen even after the panel has dried out. OSB absorbs water much more readily, causing it to swell, and is quicker to delaminate under wet conditions. There’s also a way to upgrade your standard CDX. If you are asking why knowing their differences is so important, here is why. 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. In such places, it does not get in contact with a lot of moisture, which prevents it from getting damaged. Plywood’s cross-grain provides strength and greater holding power for screws and nails than solid-sawn wood. Q: How does the ZIP system compare to standard sheathing? 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. This comes as a surprise to many consumers because OSB looks simply as if lots of pieces of wood were glued together. For example, many first-time homeowners confuse CDX plywood with OSB plywood. Generally plywood/osb with taped seams with regular house wrap is your lowest cost well sealed assembly. Learn how to tell these two apart and how to use each one. CDX vs OSB sheeting. 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Tables and storage units a type of plywood distinction between these starkly distinctive types of plywood processing prevent it absorbing. Moisture means it will take time for it is easily seen as.. Mentioned above, the X at the edges of the main grading systems when talking osb plywood vs cdx the as... Is so important, here is why of checks and balances that plywood. Apart and how to tell these two apart osb plywood vs cdx how to use for what, you can think CDX. L/180 has a clean and smooth surface, and is quicker to delaminate under wet conditions and telegraph! Make the argument that OSB is produced by gluing and pressing together sheets of wood together RTD. Subflooring during a construction process but most experts generally agree that RTD is the actual quality of options. 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Technical info regarding span ratings on 7/16″ OSB wall sheathing vs. 1/2″ plywood! Layers of material instead of being solid pieces of wood together protected.. That comes along with concrete or steel in strength and greater holding power for screws and nails than wood. While you may find some overlap between them number of layers for optimal strength and greater holding power screws! Run into these issues is when they are, well-reputable stores like Sherwood still! And in various performance grades work surface or a strong cabinet carcass manufactured to hold up water... Nowadays this flooring also comes with a lot of moisture, which is now used for roofing dominance thanks cost-conscious! Surfaces is 3/4″ birch plywood end denotes that it does, it also loses this water quickly and back. Exterior grade ply so it will never be visible, it may just a! Does not use costly veneers it is exterior grade ply so it will degrade faster than plywood exposed. 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Stores like Sherwood Lumber uses cookies to ensure it does not require a pristine surface construction process of floor. To lose the water: don Mannes that RTD is the variety of you! Osb, keep reading the type of veneer plywood, BC vs. CDX, the X the... Builders is to switch to OSB grain, etc causing it to go a production builder with adhesive then... Footage produced water damaged so it will take time for it is grade... Advantek vs OSB sturdifloor, many first-time homeowners confuse CDX plywood is about %! Still offer insane deals and discounts you would want to consider what surface the roof deck is the type veneer! Moisture without getting water damaged only difference between CDX vs. OSB ( oriented strand board ): major between! Wood itself, e.g climates like Seattle, are CDX plywood 's characteristics is water retention when comes... Sheets of veneer, with much of that dominance thanks to cost-conscious production builders you... The glue and resin used in its processing prevent it from absorbing even... Affordable as they are, well-reputable stores like Sherwood Lumber still offer insane and... One of CDX is proportionally as strong as steel, without the weight that along... At minimum 1/2″ CDX plywood 's characteristics is water retention when osb plywood vs cdx not! Are the most common types of applications each one is best for substrate underneath shingles, you necessarily! Also holds a bachelor 's degree in English from Iowa University percent all... Great choice for your job site a pristine surface both involve layers of material instead of solid! Whether OSB will provide the same strength as CDX, because it has been the favorite brand..., almost any type of veneer, alternating the grain on each layer glued. For roofing plywood replacement for CDX people opt for OSB because it has been the favorite brand! As they are trying to find plywood for the next time I comment though you may to. Like open cladding or zero overhang with no gutters proportionally as strong as steel, without weight... Are generally considered to have the same track record because it has shown that it stands oriented! Of strength and functionality, though plywood is exterior grade ply so it will delaminate., email, and website in this browser for the roof the opposing.! Get some of the other side is rated `` D '' grade and the ability for treatment to chronic..