Oriented Strand Board (OSB)

What is OSB?

OSB is a widely used, versatile engineered wood panel made using waterproof heat-cured adhesives and rectangularly shaped wood strands that are arranged in cross-oriented layers. It is similar in strength and performance as plywood, resisting deflection, warping and distortion.

How is OSB made?

OSB is made from wood strands 8 to 15 centimetres long. It uses the whole tree and makes use of crooked, knotty and deformed trees that would otherwise go unused.It is also made from abundant, small diameter poplar and aspen trees. As strands, they are mixed with waterproof resin and interleaved together in thick mats, which are then bonded together under heat and pressure. Manufacturers use a variety of different fabrication processes to deliver a spectrum of OSB products. The result is solid, uniform building panels, with enhanced features, and high strength and water resistance.

What is OSB used for?

OSB has structure and non-structural uses kinds. As a lightweight, strong and versatile wood product it can be used for roof, wall and floor sheathing. It is also sometimes used as the web material for prefabricated I-joists and a skin material for structural insulated panels. As a strong, stable panel it generally won’t warp and will resist wind and seismic loads. Other uses of OSB include RV fabrication and cargo-van panels, pallets, industrial containers, marine applications and furniture manufacturing.