Sterling 18mm OSB3 Board 2440 x 1220mm Sheet – Heavy-Duty, Structural, EN 300 Certified Upgrade your build with the Sterling 18mm Osb3 board, measuring 2440mm x 1220mm (8' x 4'). Designed for demanding structural applications, this robust 18mm Osb3 sheet is engineered from cross-laminated softwood strands and resin-bonded under heat and pressure, delivering outstanding strength and stability without knots or voids. Certified to EN 300 OSB 3 for load-bearing use in humid conditions, it’s a superior, cost-effective alternative to plywood. Key Features: 18mm Osb3 thickness: Perfect for heavy flooring, roofing, and high-load applications EN 300 OSB 3 certified: Reliable structural performance in humid environments BBA approved: Suitable for commercial and domestic construction Void-free, cross-strand construction: Exceptional stability and resistance to warping Moisture resistant: Outperforms OSB 2 in humid conditions Easy to work: Cut, drill, nail, and sand using standard tools Standard UK board size (2440mm x 1220mm): Compatible with typical stud and joist spacing Typical Applications: Heavy-duty flooring and robust roof decking Wall sheathing for structural rigidity Site hoardings and high-load platforms DIY benches, shelving, and demanding carpentry projects Installation Tips: Seal all cut edges to prevent moisture ingress Use galvanised or stainless steel fixings for best results Install on 600mm or 400mm centres for secure fixing Apply exterior protection for permanent outdoor use Choose Sterling 18mm Osb3 board for superior structural strength, moisture resistance, and easy installation—ideal for both professional builders and DIY users. For more product info click here. Important Delivery Information We offer convenient home and site delivery to get your materials exactly where you need them. If you have any special requirements, please leave a note in the customer notes at checkout. To ensure a safe and successful delivery by our crane lorry or pallet truck, please note the following access requirements: Firm & Level Surface Required: Our delivery equipment (pallet trucks and crane lorries) can only operate on a firm, level, and paved surface such as concrete, block paving, or tarmac. Surface Restrictions: We cannot offload onto soft, uneven surfaces like grass, gravel, or soil, nor can we maneuver on steep slopes. Delivery is always subject to the driver’s professional discretion regarding safety. Kerbside Policy: If we are unable to access your preferred site area due to restricted access or unsuitable ground, your pallet will be safely left at the kerbside. It will then be your responsibility to move the product to your final location. Vehicle Access: Our delivery vehicles are large (similar in size to a refuse lorry). If you anticipate any access issues on the roads leading to your property, please inform us before placing your order so we can make alternative arrangements. Difficult to find?: If your property is notoriously difficult to find please use what3words and provide in customer notes at checkout. Please feel free to contact us either in our chat box below, by email or telephone on 01372 230 830.