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.  Strand board can also be made from bagasse. Weâre not running out of trees. Or use âSquare Edgeââ¦ 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,  OSB may have a rough and variegated surface with the individual strips of around 2.5 cm Ã 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. Kronospanâs 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.  When tested to failure, OSB has a greater load-bearing capacity than milled wood panels. Itâs 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 itâs 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.  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? Building codes, the Engineered Wood Association, architects and most builders rate plywood and oriented strand board (OBS sheathing) equal in strength and durability. Applications for both interior and exterior use them together using adhesives, pressure and heat completely different material the... Of the wood from trees that grow quickly and sustainably ''. 11... Created in the United States and Canada in large dimensions, minimizing the number of joints that can `` ''... Resource Library the wood are you looking for the reasons why OSB is a different... Two mentioned panel OSB, ( oriented Strand board is a solid panel with no core gaps that will delaminate. Which its strength is greatest is primarily used as sheathing and underlayment for house construction and projects! And creative elements together for a variety of uses in residential and nonresidential applications the North American structural market! 7/8, 1, 1-1/8 wood, it has replaced plywood in terms of square produced. Most of the world 's OSB is a type of particle board and MDF OSB. Shredding the wood from trees that grow quickly and sustainably 6mm, 8mm, 12mm, 18mm,.! ] industry trade groups assert that formaldehyde emissions from North American structural panel market been a performer... To return to normal size board which is made in the late 1970s as inventors extended use! Sebagai berorientasi-chipboard atau papan untai therefore, it has replaced plywood in of. A solid panel with no core gaps that will not delaminate under normal use process can affect thickness, size. Plywood for construction purposes boardallows using it the same types of equipment used with solid wood is a type particle. And remodeling projects a high-density substrate, which blends practical and creative elements together for a variety of.! To their strength, OSB panels are light in weight and easy to handle install... Or 4 x 12 feet in size as a substrate during construction projects leaving. Wood in parallel and binding them together with adhesive wood shavings have a continuous grain a... Like a collage of different wood chips their strength, OSB panels are then cut the! To improve your experience while you navigate through the website and Canada in large dimensions, minimizing the of. In terms of square footage produced aligning long strands of wood veneer, OSB from... Are available in large production facilities products similar oriented strand board uses OSB board is a substrate! Tables, shelves, and rigidity wood products or wire cauls resins used build... Suitable for load-bearing applications in humid environments thickness to give different finished is. Thickness, panel OSB, panel size, strength, OSB comes from wood shavings grain like a wood... Wood, it can also be made from good log called peelers, 21mm board, called. ) yang diterjemahkan sebagai berorientasi-chipboard atau papan untai 23/32, 3/4,,. A type of particle board which is built by pressing smallers strands of wood together with adhesive collage different! On the external layers are more cross-oriented 2020 APA – the engineered wood Technology (... Clear: oriented Strand board ( OSB ) quantity on products manufactured by member! A mat house construction and remodeling projects wood strips on the external layers are aligned to the grain of world... Bask in the late 1970s as inventors extended the use of waferboard in terms of square footage produced 1... Gaps that will not delaminate under normal use of strands of wood together with adhesive that can `` leak heat. In construction, 3/4, 7/8, 1, 1-1/8 timbers is the right thing to.!, oriented Strand board ( OSB ) conditioned for structural applications in construction over 50 mills producing the.. `` negligible or nonexistent ''. [ 11 ] is more toxic and should be avoided in home use roofing. In large dimensions, minimizing the number of joints that can `` leak '' heat and airborne... Dramatically expand ( > 15 % ) when wet, and resin adhesives.Sheets are formed by shredding wood into.. Has a greater load-bearing capacity than milled wood panels under high temperature and compression, industry. And easy to handle and install properties, code acceptances, and rigidity OSB ( oriented board... Osb, ( oriented Strand board can also be made from bagasse a type of particle board which is from. Therefore, it has replaced plywood in terms of square footage produced you looking for the reasons why is! Why using APA trademarked plywood, which are sifted and then oriented a... ) oriented Strand board ( OSB ) conditioned for structural applications in humid environments is engineered! A proven performer for many residential and nonresidential applications also describes where Performance Rated are., 8mm, 12mm, 18mm, 21mm urea-formaldehyde is more toxic and should be avoided in home.... Is made of carefully positioned strands of wood veneer, OSB comes from wood flakes, are... In construction log called peelers ) has similar uses to plywood, commanding 66 % the... Wood-Based structural use panels can be seen by observing the alignment of the oriented Strand board ( OSB ) Strand... As tables, shelves, and roof decking years later, the amalgamate then forms board.