Adjustments to the manufacturing process can affect thickness, panel size, strength, and rigidity. Oriented Strand Board (OSB) is a man-made product created from wood bits, which are pressed and bound together by adhesive resin and glue. Plywood vs. OSB (Oriented Strand Board): Major Differences . Sheathing is considered to be the second most wood-intensive element of wood-frame construction. 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. Oriented strand board is manufactured in wide mats from cross-oriented layers of thin, rectangular wooden strips compressed and bonded together with wax and synthetic resin adhesives (95% wood, 5% wax and resin). We all know that Plywood is one of the best materials to be used for indoor construction purposes, personal projects, facing veneers of a different material, making furniture more resistant to damage and moisture, and so on. OSB is now used for about 70 percent of all floor, wall and roof sheathing in North America. Sign In Failed. Oriented strand lumber (OSL) is a structural material with very consistent properties from one unit to another, and capable of handling large loads. Phenol-formaldehyde products are considered to be relatively hazard-free. [5] Strand board can also be made from bagasse. We’re not running out of trees. Or use “Square Edge”… Twenty years later, the industry was thriving, with over 50 mills producing the product. 5/16, 3/8, 15/32, 1/2, 19/32, 5/8, 23/32, 3/4, 7/8, 1, 1-1/8. The sheets are generally 4 x 8 or 4 x 12 feet in size. Some manufacturers treat the wood chips with various borate compounds that are toxic to termites, wood-boring beetles, molds, and fungi, but not mammals in applied doses. General use Oriented Strand Board (OSB) conditioned for structural applications in humid environments. Thickness: 6mm, 8mm, 12mm, 18mm, 21mm. The finished product has properties similar to plywood, but is uniform and cheaper. This mat is then cured, trimmed to size Individual panels are then cut from the mats into finished sizes. Its performance has allowed OSB to gain entry into new markets, [1] OSB may have a rough and variegated surface with the individual strips of around 2.5 cm × 15 cm (1.0 by 5.9 inches), lying unevenly across each other, and is produced in a variety of types and thicknesses. These are bonded and arranged in a three-tier structure, with the strands in the outer layers oriented in the same direction as the panel length, and those in the core layer at right angles to it. Kronospan’s Oriented Strand Board (OSB) Superfinish ECO offers a wide range of applications for both interior and exterior use. Describes performance standards for structural wood panels and the compositions of different types of APA panels with the Performance Rated designations of APA Rated Sheathing, APA Rated Sturd-I-Floor, and APA Rated Siding. The board is manufactured from wood flakes, which are dried and blended with resin and wax and pressed into a mat. [8] When tested to failure, OSB has a greater load-bearing capacity than milled wood panels. It’s like the turkey loaf of building materials. Oriented strand board (OSB) is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. Therefore, it can also be used to build pieces of furniture such as tables, shelves, and cabinets. Although oriented stranded board (OSB) has similar uses to plywood, it has a much coarser finish. Are you looking for the reasons why OSB is leaving behind Plywood for construction purposes? Unlike it’s plywood counterpart, OSB lacks the forces that tend the wood to warp, and so is easier to get perfect dimensions and avoid warping tendencies.The one major disadvantage of OSB is its propensity to expand with moisture. OSB (oriented strand board) Oriented strand board is an engineered wood formed by adding adhesives and then compressing layers of strategically placed strips of wood. It also describes where Performance Rated panels are used and provides updated trademark and performance category information. For nearly three decades, OSB has been a proven performer for many residential and nonresidential applications. 08/27/2018 . OSB panels have no internal gaps or voids, and can be water-resistant, although they do require additional membranes to achieve impermeability to water and are not recommended for exterior use. Oriented Strand Board (OSB) is manufactured in wide mats that are formed from cross-oriented layers of thin, rectangular wooden strips. APA-trademarked OSB is suitable for a variety of end uses including subflooring, single-layer flooring, wall and roof sheathing, sheathing ceiling/deck, structural insulated panels, webs for wood I-joists, industrial containers, mezzanine decks, and furniture. All wood-based structural use panels can be cut and installed with the same types of equipment used with solid wood. Sheathing is the structural covering of plywood or oriented strand board (OSB) that is applied to studs and roof/floor joists and serves as a base for finish flooring or a building's weatherproof exterior. Oriented strand board (OSB) is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. Oriented strand board, or OSB, is a type of lumber that shares many properties with plywood or fiberboard.While other types of wood sheeting typically feature a smooth surface, this type features a rough surface made up of hundreds of wood chips.While these scraps of wood may appear randomly placed, each piece of wood is actually aligned to maximize the strength of the panel. The edges of OSB will dramatically expand (>15%) when wet, and takes much longer to return to normal size. © 2018 - 2020 APA – The Engineered Wood Association. The layers can vary in thickness to give different finished products.Plywood is made from good log called peelers. Wood strips on the external layers are aligned to the panel's strength axis, while internal layers are perpendicular. [9] It has replaced plywood in many environments, especially the North American structural panel market. All Rights Reserved. Weyerhaeuser SDS WC S537-0 2 (M) Page 1 of 11 Rev. What is it, you ask? 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