2440 x 1220 OSB 3

Build with confidence using OSB 3—the moisture-resistant, high-performance structural board designed for load-bearing use in humid conditions. OSB 3 (Oriented Strand Board) is the modern, cost-effective alternative to traditional plywood. Engineered for reliability, these 1220mm x 2440mm (8ft x 4ft) sheets are manufactured by compressing layers of precision-cut wood strands with moisture-resistant resins. This layered construction creates a board that is incredibly strong, dimensionally stable, and free from the natural defects like knots or voids often found in plywood. Whether you are laying a new sub-floor, boarding out a loft, or constructing a garden building, our OSB 3 boards provide a consistent, flat surface that is easy to work with and built to last. We stock this essential material in a range of sizes to suit every structural requirement. Key Benefits of OSB 3 Structural Boards Superior Load-Bearing Strength: The cross-oriented layers of wood strands give these boards exceptional mechanical properties. They resist warping, splitting, and delamination, even when subjected to heavy structural loads. Consistency You Can Trust: Every sheet of OSB 3 is uniform. There are no hidden soft spots or internal gaps, ensuring that every screw or nail gets a firm, secure grip anywhere on the board. Versatile Thickness Options for Every Task: At AG Fencing, we provide OSB 3 in 11mm, 18mm, and 22mm thicknesses. This variety allows you to choose the exact level of support needed—from lightweight 11mm for wall sheathing and shed roofs, to 18mm for standard flooring and flat roofs, up to the heavy-duty 22mm for high-traffic mezzanine levels and maximum load-bearing projects. Cost-Effective Durability: OSB 3 offers similar (and often superior) structural performance to plywood but at a more accessible price point, making it the go-to choice for both trade professionals and DIYers.