This OSB Board (Oriented Strand Board) is produced from softwood flakes and strips which after coating with adhesive resin are laid in specific orientations and hot pressed to produce a structural panel. The BBA classification permits use in a wide range of applications such as roofing and flooring in both commercial and domestic situations. Its strength and performance is similar to plywood, resists warping and distortion. Ideal for sheds, pallet tops, display boards, shelving and more. No knots or voids. OSB 3 as sold by Builder Depot is moisture resistant and suitable for use in humid conditions. It is very versatile and available in a size of 8ft x 2ft with a thickness of 18mm.