Exterior plywood is intended for use in non-structural, exterior application where a high-quality aesthetic finish is required. The top and bottom plies are called the "faces" which receive a rating to the degree of smoothness and blemishes which exist on the wood. Expert plywood product tutorials and catalogue updates will have you completing your project in no time. The difference between the two is that marine plywood is supposed to void free, just as John O points out. Feb 13, 2018 Knowing that a difference in marine grade plywood exists and how it will effect the project face that can operate as a reliable surface for a decking veneer or fiberglass overlay. Regardless of whether it’s British Standard or Australian Standard, a Marine Ply needs to go that extra mile to actually receive the “marine” title officially. View our Privacy Policy here. This plywood is usually formed to build boats because of its water-resistance. The durability rating must be Exterior and a fully waterproof structural adhesive must be used. We are able to CNC route some exterior plywoods, drop us an e-mail if you require this for your project. The primary difference between exterior grade plywood and marine plywood is the fact the cores will have small voids in the inner veneers. Exterior Plywood or Marine Grade Plywood? Some of these questions we have addressed specifically through in-depth ... Plyco staff dream of pine scented car fresheners. Exterior, is the grade given to any plywood which is bonded with 100 percent waterproof adhesive and is intended for permanent outdoor exposure. Marine plywood is made strictly of Douglas fir and Western larch woods. The center layer of plywood is referred to as the "core" and often a joint is placed down the center of the plywood to allow for expansion/contraction. Plywood graded C-D or CDX is often mistaken for exterior plywood but is not approved by the APA for outdoor exposure. The species of wood, the glue used, sanding, blemish levels, and core-gap size are important aspects of the plywood's grade. When you cut a sheet of exterior grade plywood, you may expose a gap on the cut surface. Providing sustainable plywood products has long been a focus here at Plyco. Marine ply uses a waterproof higher grade of glue in between the layers of veneer which also has less imperfections than standard plywood, and is marked with ‘BS 1088’ meaning: “BS1088 is the British Standard specification for marine plywood that applies to plywood produced with untreated tropical hardwood veneers that have a set level of resistance to fungal attack. Marine grade can be sawn without getting an interior void on a freshly cut edge. I had an issue where I needed to remove a few panels of my vinyl siding as ... does exterior plywood need waterproofing? The same glues are used to assemble the plywoods. The marine-grade plywood, commonly referred to as marine plywood, is not waterproof as many people often claim. Without clear information, it can be extremely difficult to choose a side in the Marine Plywood vs. Another large difference is aesthetic quality. I know th... Made entirely of Douglas Fir or Western Larch, Common Applications for Basic Types of Plywood. Exceptions to this might include tropical hardwood throughout plywood and marine grade plywood. Unlike treated plywood, glue is applied on marine plywood's surface. You can get the same performance from panels such as exterior AC in most cases. In conclusion, exterior grade plywood may replace cheap marine grade plywood in cases of an outdoor structure yet it will never fully replace it for all uses. All information is provided "AS IS." In reality, marine grade is generally just nicer but it depends on the grade. Identification. Marine plywood can be used for all the jobs which can be done by exterior plywood . The species of wood can also vary and often different species are combined. Marine plywood is a type of special-purpose plywood commonly used in moist and It is worth bearing in mind that, provided the EN314 bonding is Class III to start with, an otherwise EN636-2 plywood can be upgraded to EN636-3 by preservative treatment, to treatment class T3 (DD CEN/TS 1099:2007). Particularly in our Gaboon Marine Plywood and Hoop Pine AA Marine Plywood options, the aesthetic quality is significantly higher than what you would find in … DoItYourself.com®, founded in 1995, is the leading independent The Key Differences Between Marine Plywood and Exterior Plywood, This post is part of Plyco’s Guide to Marine Plywood, The Key Things to Know About Marine Plywood vs MDF, Plyco Launches Sustainably Sourced Plywood Range, Win a $500 Plyco Exterior Plywood Gift Card, Answering The Most Frequently Asked Plywood Questions. It has no chemicals added to enhance decay resistance, unless it has been subsequently pressure treated (= $$$). Marine Plywood. It is created by breaking down wood residuals into wood fibers. Our Co2 laser cutters are unable to successfully cut through exterior grade, marine grade or structural grade plywood. Core gap size for exterior wood cannot exceed 1 inch wide. I have used exterior grade plywoods in all my boat projects as the marine plywood is just to expensive. Made entirely of Douglas Fir or Western Larch, marine-grade is one of the highest designations which can be given to a piece of plywood and is considered to be "premium." What Is the Best Way to Reinforce a Creaky Stair Banister? I have made some steps from exterior grade plywood to be used outside for a... Leaky detached garage at ground level (snow melt seepage). Marine-grade plywood primarily uses for those applications, where moisture is present for a long time. Brandon is the Woodworking Wordsmith and Social Media Sage at Plyco HQ. This glue keeps the wood waterproof while saving it from decay. Marine-grade plywood, often simply called marine plywood, is not what it's often claimed to be. It is a good-quality, hardwood plywood made with waterproof glue, but since it's not treated with chemicals it is not rot-resistant. This is the same adhesive as used in AC Exterior grade plywood. There can be no voids or holes hidden on the inner layers of marine grade plywood. Marine plywood is intended for boat-building or other marine applications, aircraft construction . To know which is best for a specific project, it is best to evaluate the cost, use, aesthetics, and overall goals of what is intended to be built. Marine plywood can also be used in construction. Different countries have different names, but most standards are essentially the same as is the construction of plywood. Read more. Marine plywood is intended for use in boat building or other marine … D-grade plywood: D-grade plywood sheets are the most inexpensive. You may freely link Exterior grade plywood is for roofs or where direct contact with water is possible. Marine plywood is good for things that need to withstand water like boats. there are other grades of plywood that may be rated better than marine grade, such as BS1088. CDX plywood is considered Exposure 1 plywood. The edges tend to cut and sand cleaner than the standard plywood. The grades of plywood in case of exterior are A-C, B-C and CDX. We welcome your comments and submitted to our "DoItYourself.com Community Forums". . Plywood grades are not regulated by the U.S. Federal government but are a voluntary set of standards administered by the APA. Here at The Laser Co we only cut interior grade plywood (which is sometimes labeled as non structural). They are used in the construction of a house exterior region or outdoor furniture. All rights reserved. Exterior Plywood battle. Marine grade has no special waterproofing in or on the wood, unless it has been added as a special feature. Marine plywood and exterior grade plywood both use the same glue. As the grade decreases, wood can be "repaired" and altered in order to create a full sheet without knots. Marine Grade Plywood, on the other hand, costs roughly $100 per 4×8 sheet. Because of this, our Hardwood Exterior Plywood is a good choice when you need an exterior product, but don’t necessarily need something Marine Grade. Without just one of these factors present a Plywood cannot be considered marine grade. Exterior Plywood. In order to be A-grade plywood, there cannot be any knots or knotholes present in the layer. Copyright© home improvement and repair website. The mixture is then flattened and made into panels by applying high temperature and pressure. This entirely changes the look of the plywood when that is the case. This type of wood’s thin sheets of veneer (plies) are usually set up […] It is a stronger grade of plywood and has no open knots. For greater detail, you can read about this in our “What is Marine Plywood?” blog post, but the summary version is that: (i) there must be absolutely no core-gaps, (ii) the veneers used must be of the highest quality, and (iii) the glue needs to be waterproof. 1995-2018 MH Sub I, LLC dba Internet Brands. Structural Plywood When the appearance of the face is of lesser concern than the strength and stability of the material, structural plywood will typically be the choice. Alternatively, if you’re still looking for more information you should take a read of our blog post “The Key Things to Know About Marine Plywood vs MDF”. The most obvious similarity is that both Marine Plywood and Exterior Plywood are designed to be used externally. As mentioned, a Marine Ply has to be knot free in order to get its official classification, but with Exterior Plywood you can find knots of up to 1 and a half inches present! From here however, the two products begin to diverge from one another and begin to display how unique they are. MDF stands for medium-density fiberboard. It is an engineered wood product. There are many projects that may require plywood that’s water resistant; however, few require waterproof marine grade plywood. When purchasing exterior plywood, read the marks on the plywood to identify it. With marine grade, the lowest grade veneer that can be used is "B," which means that there will be no voids on the surface or in the interior plies. Another large difference is aesthetic quality. The marine plywood is only available in A-A grade. Marine grade plywood is a waterproof product intended for exterior uses that will typically do more than come into contact with water but will in all likelihood be completely submerged. Without just one of these factors present a Plywood cannot be considered marine grade. The major differences between marine plywood and exterior plywood come from the standards for plywood grades set forth by the American Plywood Association (APA). Clp-inc – When it comes to building certain types of durable structures like boats and decks, regular plywood often isn’t the best option. On the contrary, exterior grade may have knots as big as 1”. Sourced from all over the world in all sizes, thicknesses and grades, you could say our factories are the United Nations of timber. However, this wood is a good-quality, hardwood plywood created with waterproof glue. Can I use liquid sandpaper to paint paneling. Exterior plywood is manufactured with a higher quality(A, B, or S grade) face with a reduced quality (C or D grade) back. Both products utilise an A-bond glue, allowing them to stand strong in the face of all the unique challenges that come with being used in the unpredictable outdoors. Crafting copy for customer tutorials, inspiration and advice, Brandon builds and maintains Plyco's plywood knowledge base. The Plyco plywood and veneer blog provides product information, practical tips, and project inspiration for completing DIY, architectural & professional projects. If the Marine Plywood vs Exterior Plywood debate has been settled and you know exactly what you’re looking for, head on over to Plyco’s online Plywood store where you can shop our entire product range. It can encounter high moisture content but needs to be sealed for complete outdoor use. Exterior Plywood and Marine Plywood are closely related, however we hope this post has been able to help you distinguish these two outdoor Ply boards from one another. Exterior grade plywood is made with water-resistant glue, but the exterior shell is the only layer that is made void-free. In these situations the initial higher price of the marine grade is justified in exchange for peace of mind. Exterior wood is good for most all wood needs and can be purchased to look almost identical to marine plywood at a much lower cost. Website operating Marine grade plywood, on the other hand, is a different creature. Questions of a Do It Yourself nature should be Similarly, you can also find core gaps present, although they do have to be under an inch wide or the Ply will lose its exterior grading. While the A-bond glue used in Exterior Plywood makes it similar to a Marine Plywood, there is so much more going on under the hood that the comparisons actually start to look a little bit silly. These wood fibers are then combined with wax and a resin binder. For bathrooms, a Luan plywood is good to put on top of decking plywood for protection. A big difference that our Exterior Plywood offers is that it comes in three different sheet sizes, allowing for greater flexibility when building. You’ll want it to be pressure treated. - J Gibson McIlvain. suggestions. Marine Plywood is perfect to use in humid and wet conditions and resists delaminating and fungal attack. Marine-Grade Plywood vs Pressure Treated Plywood Marine-Grade Plywood. Marine Grade Plywood is arguably the strongest plywood on the market, and its eye-watering price reflects that. A-B: This type of panel is also often found in a 4 feet by 8 feet size but is ¾-inches thick. Exposed Exterior Panels. A-A: This grade of exterior Western plywood typically comes in sizes of 4 feet by 8 feet or 5 feet by 12 feet and ½-inch thickness. The standards required by APA- The Engineered Wood Association, for a product to be called “marine grade” are not that much higher than your typical exterior grade plywood. There may be gaps, voids and the resulting points of weakness in the interior layers. C-grade plywood: A little lower down in quality, C-grade plywood has some knots throughout its sheets, up to 1.5 inches in diameter. Exterior wood is good for most all wood needs and can be purchased to look almost identical to marine plywood at a much lower cost. Additionally, marine plywood is considerably harder to find and more expensive than other grades of plywood. problems contact [email protected]. This wood is not treated using chemicals and not rot-resistant as well. 04-11-2010, 07:42 AM #4 . Exterior plywood is glued together with adhesives that are meant to survive in wet or moist areas. They haven’t been repaired, and the flaws can be a little larger and more noticeable. In comparison, Plyco’s Marine Plywood will be often used for its stunning looks to create magnificent boats, as it strikes a balance between the strength and water-adaptive qualities and the visual qualities. Marine plywood is a lot more expensive than exterior plywood and is generally used in applications where the cost of a failure of a board would be extremely high. Marine grade plywood is similar to standard exterior-grade plywood, but its core consists of knot-free sheets, eliminating the possibility of the formation of water pockets within the structure. This difference is why we often see customers using Exterior Plywood for something like a trailer, or various storage applications where appearance isn't important. It’s one of our most commonly asked questions regarding Marine Plywood. The maximum core gap size allowed is 1/8 of an inch, and both outer panels must be sanded, Medium Density Overlay or High-Density Overlay. CDX plywood is considered Exposure 1 plywood. Simpler is better, except when complicated looks really cool. Same is true of exterior grade. On the surface, they seem extremely similar, but knowing the key differences between Marine Plywood and Exterior Plywood can save you from a lot of headaches further down the line. A proud manufacturer, distributor and retailer of timber-based panel products, Plyco is 100% Australian owned. That is, it's not waterproof. Better grades also tend to … Accordingly, it is denser and stronger than exterior plywood. Striking a balance between industry-leading quality while not harming our ... Plyco is excited to announce our latest competition, where you can go into the running for a $500 gift card to be used on select Exterior Plywood prod... During the course of a regular week here at Plyco we’re asked many questions. Marine grade has no natural decay resistance. plywood is used as a substrate for an exterior hardwood, softwood, or composite material. B grading means that the wood may have some knots, but no knotholes. With many options for glue, veneers, plies, and preservatives to consider, close examination of what your final project will be subjected to must be considered before deciding which marine plywood product to buy. Firstly, to be classified as a Marine Plywood, the product needs to meet strict standards. Plywood graded C-D or CDX is often mistaken for exterior plywood but is not approved by the APA for outdoor exposure. Marine-grade plywood is a sturdier, higher-quality material made of Western Larch or Douglas-fir that is not treated with chemicals. Exterior plywood must be graded a C or above, meaning knots and knot holes of up to 1½ inches are allowed. Plywood is created by gluing layers of wood (called plies) together at opposite grain patterns with the top and bottom grain always running horizontally. Particularly in our Gaboon Marine Plywood and Hoop Pine AA Marine Plywood options, the aesthetic quality is significantly higher than what you would find in an Exterior Grade Plywood. hbspt.cta._relativeUrls=true;hbspt.cta.load(4078144, '820f1509-f184-4c7e-b349-6282de1d33df', {}); Before we get into the details of what separates these Plywood cousins, it’s important to acknowledge their similarities. Depending on the grade of plywood, core gaps increase in size and frequency. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. A 4×8 foot sheet of exterior graded plywood can cost around $10 a sheet. Pressure-treated plywood usually has a greenish hue and a slightly oily surface. General exterior plywood is intended for indoor or outdoor application where resistance to weather/water is required . These grades are referred to as "plugged" as often knots need to be plugged in order for the ply to meet grade requirements. You’ll also see similar face grades between Plyco’s Hardwood Exterior Plywood and some of the cheaper Marine Ply options (like Pacific Maple Marine Plywood). This post is part of Plyco’s Guide to Marine Plywood and highlights the important differences between Marine and Exterior Grade Plywood. Common plywood markings will have three letters indicating the plywood's application. Marine plywood is different from pressure treated plywood. Typical applications include signs and non-structural claddings. Exterior Plywood. to this site, and use it for non-commercial use subject to our terms of use. For large flat surfaces wider than 12″ exposed to the weather like soffits, board and batten siding, or other decorative elements, there is really nothing better than marine grade plywood. In order to be marine grade plywood, the outer plies must be graded at least a B or better. Marine grade uses exterior adhesive.

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