What is it, you ask? While it is a widely used acronym, specifically for ocean groups and religious organizations, for our purposes OSB stands for oriented strand board. Oriented strand board was created in the late s as inventors extended the use of waferboard. It differs from other wood-scrap products because its long strips of wood are placed strategically rather than randomly.
Manufacturers of OSB engineer their product to match a performance-rated scale. It comes in various sizes, usually ranging from a quarter-inch 6 mm to three-quarters of an inch To form panels, these strands are grouped into big sheets and pressurized at a high temperature. OSB has come into fashion as a product with the same purpose and function as plywood -- so OSB and plywood compete in the marketplace.
Click to the next page to hear whether experts vote for OSB or plywood in the battle of what is the best product for construction. You have doubts about the newness of OSB and its ability to compete with plywood. So let's hear some expert opinions on the matter. And, as with any wood product, you need to make sure to select the proper grade. You want a grade that will ensure waterproofing capabilities.
These are shown in the table above. OSB contains no knotholes, core voids or points of weakness. Due to its multi-strand construction, it is not subject to delamination or blistering, as can be found on low-quality plywood. OSB varies in colour from a light straw to a medium brown depending on the wood species used, resin system adopted and pressing conditions employed.
Factory-applied finishes can be used to give OSB a uniform appearance, as well as weather protetion, and further decorative finishes may be applied directly. OSB has a number of sustainability benefits over alternative products. No tropical hardwoods are used in its manufacture and producers such as Coillte use only wood sourced from European FSC-certified sources. This is therefore located close to its market and not subject to excessive transportation.
Moreover, OSB uses wood selectively removed for the purpose of forest thinning and small-diameter wood from fast-growing species such as spruce and pine. OSB3 that has no formaldehyde added during manufacture, due to the use of specialist resin, can also be awarded the maximum available credits in the volatile organic compounds section of the BREEAM environmental rating system.
Concerns regarding arson attacks on large timber-frame construction sites have resulted in renewed focus on the flame-retardant properties of timber and new test methods defined by the Structural Timber Association to determine performance. Flame retardance can be achieved through on-site or post-production treatment of wood panels, lamination of protective finishes onto the surface, and so on. However, in some cases this can lead to the panel becoming brittle, and the lamination of different materials onto the panel surface can make cutting and working of the panel more difficult.
This ensures that flame-retardant properties extend throughout the panel, which means that cut edges present no problem and it is easy to cut and fix using normal woodworking tools. Moreover, as the additive is introduced during manufacture, the panels can be CE marked at source.
OSB3 used for wall sheathing can have a positive effect on the thermal performance of framed walls. The sheathing can help to ensure the specified performance of insulation materials as it encloses and supports the insulation, thereby helping to prevent thermal bridging and thermal looping. The use of OSB3 in Passivhaus and low-energy framed buildings is increasingly popular due to its natural ability to resist the passage of air not to be confused with water vapour permeability.
As design values can vary between manufacturers, it is important to ensure that the panels specified by the designer are those used on site. All panels should be clearly marked with the following information:. Information you supply to UBM Information Ltd may be used for publication and also to provide you with information about our products or services in the form of direct marketing by email, telephone, fax or post.
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Deadline to complete: 26 November This Kingspan Insulation sponsored CPD explains why, to achieve the reductions needed in home energy use, new technology such as heat pumps must be accompanied by measures like insulation. Site powered by Webvision Cloud. Skip to main content Skip to navigation. No comments. How to take this module The free continuing professional development distance learning programme from Building is open to anyone who wants to develop and improve their professional knowledge.
This standard sets performance ratings grades for specific end uses such as floor, roof and wall sheathing in light-frame wood construction.
There are more than forty species of native trees in the province. Discover 17 of the most widely used for everything from single — family ho m es to tall timber towers. BC manufacturers produce a range of OSB products for structure and non-structural uses. As a lightweight , strong and versatile wood product it can be used for roof, wall and floor sheat hing.
It is also sometimes used as the web material for prefabricated I-joists and a skin material for structural insulated panels. Other uses of BC-made OSB include RV fabrication and cargo-van panels, pallets, industrial containers, marine applications and furniture manufacturing. OSB can be chemically treated to improve resistance to decay or to fire.
It is water-resistant when treated correctly with resins. OSB manufacturers must test their products to determine the effects of fire retardants, or any other chemicals. Similar to plywood, OSB is often a go-to product and preferred for its many common uses.
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