cdx plywood vs osb

BY SEAN GROOM Drawings this page: Don Mannes. 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. A substantial savings to be sure. OSB, CDX, ACX and T&G Plywood For mobile users: touch and drag to move table left, right, up or down. Plywood’s cross-grain provides strength and greater holding power for screws and nails than solid-sawn wood. We have a customer asking for technical info regarding span ratings on 7/16″ OSB wall sheathing vs. 1/2″ 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. Thank you for your prompt response. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks. ACX and CDX are both exterior plywoods and aren’t specifying the type of wood. Because plywood is rated as shop grade because of defects, almost any type of plywood can end up in the shop grade bin. 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. 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. OSB retains water longer than plywood does, which makes decay more likely in OSB than in plywood. plywood cdx -vs- OSB. OSB made from aspen or poplar is relatively susceptible to decay. 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. For a decking, or substrate underneath shingles, you can usually use either material. Because OSD does not use costly veneers it is as much as half the price of regular plywood. newbuilder | Posted in Construction Techniques on November 6, 2004 06:48am Seems to me this MUST have been ‘talked about’ here an there… but in addition to my general quiry I’ve got some very specific questions. I’m figuring there must be some advantage as I occassionally … Please send me any information you can that would demonstrate that Trubord OSB is a suitable replacement for CDX. It has a clean and smooth surface, and it holds nails and screws well. Sanded Pine: Sanded pine is a versatile plywood material. OSB is now used for about 70 percent of all floor, wall and roof sheathing in North America. There was no real choice in OSB then. Tweet on Twitter. A: Clayton DeKorne, chief editor of JLC, responds: VOC emissions are pretty much a nonissue for exterior-grade plywood and OSB. Just make sure it is exterior grade ply so it will not delaminate if it gets wet. One of CDX plywood's characteristics is water retention when it comes into contact with harsh elements like rain. 1/2 in. However, more and more contractors are turning to RTD because of its inherent benefit. 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. While OSB is the top selling product by far, it does not mean it is the best choice. Panels designated Structural I must meet all of the manufacturing and performance standards of Rated Sheathing, as well as certain additional requirements. PLYWOOD VS. OSB. The trend among builders is to switch to osb. There is no question that plywood is better then OSB. That's why people prefer Advantech over plywood and OSB flooring. Use 5/8 inch C/C PTS grade for your overhangs and 5/8 inch CDX for the rest. 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. The sheets are generally 4 x 8 or 4 x 12 feet in size. OSB boasts a more consistent density. Furthermore, when OSB gets wet, its edges tend to swell and stay swollen even after the panel has dried out. In general, I’m wondering what the upside of using plywood is over OSB as sub-siding. While there are actually several materials you can use to sheath your home, the post popular are wood-based products, OSB And CDX plywood. Building codes, the Engineered Wood Association, architects and most builders rate plywood and oriented strand board (OBS sheathing) equal in strength and durability. Question and Answers. One of the main grading systems when talking about the plywood is the smoothness of its front and back sides. My go to option for cabinets boxes and work tables surfaces is 3/4″ birch plywood. In 2001, oriented strand board surpassed plywood in terms of square footage produced. When I started out in construction, I was working for a production builder. CDX is oftentimes used for creating work tables and storage units. OSB vs Plywood: Fast Fact. VOCs in Plywood vs OSB. AdvanTech Subflooring vs. OSB vs. Plywood 5 Min Read. 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. For example, many first-time homeowners confuse CDX plywood with OSB plywood. Many people like to use CDX plywood as subflooring in the construction of new homes. By Clayton DeKorne Download the PDF version of this article. Exterior-rated structural panels use moisture-resistant phenolic … By. Structural I, also referred to as “STRUC I,” may be OSB or plywood and is, essentially, a subcategory of APA Rated Sheathing. By Matt Risinger. In 2009, Advantech won the best product competition in Architectural Record and it has been the favorite flooring brand since 2002. 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. Are there any roofing situations where osb should NOT be used? OSB takes longer than plywood to get saturated, but also takes much longer to dry out. 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. Let’s walk through the pro’s and con’s of each product and why we went with the one we did. Of course, tree species plays a large role in this determination. 3/8” OSB (9.5mm) 1.25 per square foot: 40 lbs: 5/16 OSB (7.5mm) 1.43 per square foot: 45.76 lbs: 1/2” OSB (12.5mm) 1.67 per square foot: 53.44 lbs: 5/8” OSB (15.5mm) 2.08 per square foot: 66.56 lbs: 3/4” OSB (18.5mm) 2.50 per square foot: 80 lbs: PLYWOOD BOARD. Their architect is asking whether OSB will provide the same strength as CDX, and meet code requirements. Plywood vs. OSB (Oriented Strand Board): Major Differences . Uncategorized; Selecting The Right Plywood, BC vs. CDX. Second, you can think of CDX kind of like your grade of plywood. If you are new to working with plywood, it is easy to get some of the options mixed up. 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. However, as plywood has been around longer, it has shown that it can last 50 or more years in an installation. Home Uncategorized Selecting The Right Plywood, BC vs. CDX. OSB does not have the same track record because it has only been marketed for about 30 years. The mixture is then cast and baked to produce a plywood-like sheet. 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. The three most common are its appearance, it’s variety in options and the ability for treatment. Once the plywood dries, it may end up warped due to the elements. than CDX plywood. This includes interior and exterior plywood of any thickness. 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! While a sheet of plywood might be 5 to 7 plies thick, a sheet of OSB is made from as many as 50 strand layers packed and compressed into the same thickness. Work Surfaces . Plywood and OSB are generally considered to have the same load strength. L Plywood vs. OSB New-generation structural panels mean decade-old notions are no way to choose sheathing. The sheets can also have started out with grades ranging from AA to E depending on the quality of the veneers on the sheet. When you are boarding up for a big storm, you should be using at minimum 1/2″ CDX plywood. Here’s what you need to know. The fully adhered membrane is only really worth it if you are doing something silly like open cladding or zero overhang with no gutters. Moisture resistance • Plywood absorbs ... with less glue than plywood. It is super smooth and sturdy and makes for a great work surface or a strong cabinet carcass. This won’t imply the actual quality of wood itself, e.g. comparing the quality of luan and pecan tree, but rather the finish of surfaces. If this is your final finish, we’d recommend plywood over OSB every time. Treated for ground contact use, it is ideal for a variety of applications, including deck, playsets and walkways. CDX plywood is still a great piece of plywood if you are looking to build something that does not require a pristine surface. x 4 ft. x 8 ft. CDX Ground Contact Pressure-Treated Plywood This plywood is Pressure-Treated in order This plywood is Pressure-Treated in order to protect it from termites, fungal decay and rot. Should you use CDX (plywood) or OSB (oriented strand board) for roofing plywood? Plywood used to be king for wall sheathing and flooring material, but oriented strand board (OSB), introduced in the late 70s, is now the most popular. 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. First, plywood looks significantly better than OSB. 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. Answer. Nowadays this flooring also comes with a 50-year warranty for every new buyer. Share on Facebook. OSB does not provide adequate protection against fast moving storm debris. (339.26 kB) Q: What are the concerns about VOC emissions from exterior plywood and OSB? Jim McFarland, Vandalia, OH. OSB and plywood offer similar (and sufficient) performance in terms of strength and functionality, though plywood is about 7% stronger. CDX Plywood vs OSB . Generally plywood/osb with taped seams with regular house wrap is your lowest cost well sealed assembly.

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