However, OSB is generally considered less resistant to water (it swells in thickness when exposed to moisture) and some people prefer plywood for roofs and subfloors. – Usage. 2 Dec 2020. The layers can vary in thickness to give different finished products. 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. Delamination is when plywood layers separate, largely due to humidity or extreme heat. Compared to CDX, oriented strand board (OSB) is made very differently. For hardwoods, plywood is desirable because it holds nails slightly better than OSB. Plywood may also be made out of less-quality softwoods for its top layer. That, however, is where the similarities end. 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 absorbs water more slowly than plywood, which can be beneficial in areas of low dampness. OSB has over 70% market share for structural panels. Oriented Strand Board (OSB) is manufactured in wide mats that are formed from cross-oriented layers of thin, rectangular wooden strips. When it dries, it is more likely to return to its regular shape. Neither material has any real impact on the resale value of a home. OSB is … Although oriented stranded board (OSB) has similar uses to plywood, it has a much coarser finish. However, the time it will take to install or remove screws on OSB and plywood sheets are the same. Definitions in laymen's terms, cost considerations, pictures and things you need to know. Plywood manufacturers have also introduced grid-marked sheathing, and it is advisable to use that because it speeds installation. Installation costs for both would be $490, assuming that the carpenter can install approximately 75 feet of material per hour. OSB boasts a more consistent density. While it is possible that OSB will follow suit, it will soon be possible to find plywood without formaldehyde everywhere, while finding OSB without this chemical may be more difficult. Both OSB and plywood absolutely hate water, Lipinskiy mentions, going on to say that the most important part, regardless of which decking option you choose, is that all penetration points on a roof are sealed. 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. Building codes recognize both plywood and OSB to be alike in their properties and use the phrase "wood structural panel" to describe them. Cost varies greatly by region (and even by zip code).To get free estimates from local contractors, please indicate yours. Installing either sheathing over a 500 square foot area would cost roughly $160 in material for plywood and $100 for OSB. Aspen and Poplar tree species are used. Plywood is the more traditional and familiar of … The only difference is that OSB is slightly more flexible than plywood, which has advantages and disadvantages depending on the setting and distance between the joists that is being covered. 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. The contractor can choose an oriented standard board (OSB) or plywood to create the decking of the roof. Item #193552 Model #31122.031122.0 Plywood is available in many plys and different levels of quality. FIXR provides cost guides, comparisons, and term cheatsheets for hundreds of remodeling, installation and repair projects. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. They work equally well when it comes to these uses, they are easy to drill into, plus they have an equivalent capability of holding nails. Moisture also affects the strength of plywood; so while exterior glued plywood can be used outdoors, it works best when moisture content remains low. Plywood is the more expensive option to build with than OSB. Manufactured from waterproof heat-cured adhesives and rectangularly shaped wood strands that are arranged in cross-oriented layers, OSB is an engineered wood panel that shares many of the strength and performance characteristics of plywood. OSB win against plywood when it comes to shear strength. So both products perform equally well as shear-wall components. Oriented strand board is cheaper than plywood when used as roof decking, sheathing and subfloor. While the name may be unfamiliar, you probably recognize this material. The layers are formed by shredding wood into strips. However, once it has absorbed water, it dries more slowly. Plywood is familiar to most people—it is a sheet material made from layers of wood oriented in opposite directions from layer to layer. Whether you are building, remodeling, or just doing some repairs, many times you need a type of sheathing or underlayment for the project. Oriented Strand Board is a widely used, versatile structural wood panel. OSB is made by combining glue, resin, and wood chips and pressing them into the shape of a plywood sheet then baking everything together. Both OSB and plywood are used for subfloors, walls and sheathing roofs. OSB and plywood vary in terms of durability. This can result in visible deflection of the panels between the supports and can telegraph through causing a wavy appearance to the roof. Plywood can have many different styles and appearances. Therefore, it is generally installed beneath a finish material, such as siding. While OSB (Oriented Strand Board) is generally cheaper than plywood, it is heavier and not as stiff as plywood and can result in soft squeaky floors under weight. Plywood is made of many layers of very thin wood, called plys, pressed together with glue. Hence, can be nailed at the edges without worrying about them. So OSB is preferable for applications where longer or wider panels are required. The increased weight of OSB means that it is harder to install and it will put more stress on the house. This plywood is generally used beneath the finished material, such as tile or siding. Diffen LLC, n.d. The proven track record of plywood often leads some people to believe that it is a more durable and longer-lasting product, but this is not necessarily true. OSB Vs. Plywood. Face veneers are higher grade than the core veneers. The Miami-Dade County Board of County Commissioners banned OSB for use as roof sheathing after Hurricane Andrew destroyed thousands of homes in 1992.. This comes as a surprise to many consumers because OSB looks simply as if lots of pieces of wood were glued together.