{"product_id":"11mm-structural-osb-3-2440mm-x-1220mm","title":"11mm Structural OSB 3 Sterling Board 2440mm x 1220mm (8' x 4')","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eStructural OSB 3 Sterling board, measuring 2440mm x 1220mm (8' x 4') with an 11mm thickness.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eEngineered from cross-laminated softwood strands and bonded with resin under heat and pressure, it delivers consistent strength and stability without knots or voids.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003eCertified to EN 300 OSB 3 for load-bearing performance in humid conditions, it serves as a practical and cost-effective alternative to plywood for many structural applications such as roofing decks, wall panels, and general sheathing.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStructural classification:\u003c\/strong\u003e OSB 3 certified to EN 300, for load-bearing use in humid conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBBA approved:\u003c\/strong\u003e Permits use in a wide range of commercial and domestic projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoid-free construction:\u003c\/strong\u003e Consistent strength with no knots or core gaps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-strand stability:\u003c\/strong\u003e Resists warping, splitting, and expansion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture performance:\u003c\/strong\u003e Reliable in humid environments, unlike OSB 2 (dry-use only).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorkability:\u003c\/strong\u003e Easy to cut, drill, nail, and sand with standard tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoard size 2440mm x 1220mm: \u003c\/strong\u003eCompatible with UK framing centres for straightforward fixing on standard stud\/joist spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness 11mm:\u003c\/strong\u003e Provides reliable strength for roofing, sheathing, and general panel work.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof decking\u003c\/strong\u003e: Acts as a stable, load-bearing base beneath membranes and primary roof coverings. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSarking\u003c\/strong\u003e: Used under the primary roof covering (like slates or tiles) to provide a secondary barrier and add rigidity to the roof structure. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTimber frame wall sheathing\u003c\/strong\u003e: Structural EN 300 classification provides necessary lateral stability and stiffness when fixed to internal timber studwork at 600mm centres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlooring underlayment\u003c\/strong\u003e: Provides a solid, level surface suitable for light domestic flooring applications. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSite hoardings\u003c\/strong\u003e: Delivers a durable, cost-effective solution for temporary site enclosures and fencing. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheds and garden buildings\u003c\/strong\u003e: Ideal for robust construction of walls, roofs, and flooring. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShopfitting and displays\u003c\/strong\u003e: Versatile enough for the fabrication of shelving units, structural stands, and internal panelling. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral DIY projects\u003c\/strong\u003e: Practical for wide-ranging construction tasks requiring a high-strength, stable panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarden shed construction\u003c\/strong\u003e: High racking resistance and moisture-tolerant resin make 11mm boards ideal for cost-effective wall sheathing and roof decking in timber outbuildings. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnimal shelters and kennels\u003c\/strong\u003e: Moisture-resistant properties allow for use in sheltered exterior applications such as chicken coops and kennels when finished with appropriate timber treatments.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Guidance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAllow for expansion\u003c\/strong\u003e: Leave a 3mm expansion gap between all board edges and a 10mm gap at rigid wall abutments to accommodate natural movement. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStagger the joints\u003c\/strong\u003e: Lay panels in a \"brick-bond\" pattern across supports to ensure structural loads are distributed evenly across the frame. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport all edges\u003c\/strong\u003e: Ensure every board edge is supported by a joist, stud, or noggin to prevent deflection and maintain a level surface. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply correct fixings\u003c\/strong\u003e: Secure boards using galvanised nails or screws at 150mm intervals along edges and 300mm intervals on intermediate supports. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal cut edges\u003c\/strong\u003e: Coat all field-cut edges with a high-quality water-resistant wood sealant immediately to prevent moisture ingress and edge swelling. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrient boards correctly\u003c\/strong\u003e: Install the long axis of the board perpendicular to the supporting joists or studs for maximum structural spanning strength. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect from weather\u003c\/strong\u003e: Cover installed boards with a waterproof membrane as soon as possible if the structure is not yet fully weathered. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixing distance from edge\u003c\/strong\u003e: Ensure all fasteners are driven at least 10mm from the board edge to prevent breakout and maintain pull-through resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface painting\u003c\/strong\u003e: Use a high-quality solvent-based primer or dedicated OSB sealer before applying topcoats to prevent strand swelling, as detailed in our \u003ca href=\"https:\/\/materialsmarket.com\/articles\/a-comprehensive-guide-to-painting-osb\/\"\u003ecomprehensive guide to painting OSB\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompliance \u0026amp; Performance\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: EN 300 OSB 3 classification, verified for structural use in humid environments. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification\u003c\/strong\u003e: BBA approved for quality and compliance in construction. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBonding\u003c\/strong\u003e: High-pressure, resin-bonded layers provide long-term durability and resistance to delamination. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVeneer quality\u003c\/strong\u003e: Free from internal knots and core voids, ensuring consistent structural integrity across the board. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note\u003c\/strong\u003e: Colour and finish are representative only and may vary slightly as this is a natural product. Always ensure proper ventilation if using in enclosed spaces, though this board is manufactured to E1 low-formaldehyde emission standards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003ch2\u003eWhat Customers Are Saying\u003c\/h2\u003e\u003cp\u003eCustomers rate this OSB3 board highly for its strength and versatility across DIY projects. One reviewer built an entire shed using it for walls, roof and floor, reporting excellent results after coating with wood protector. Others praise the fast delivery, accurate product descriptions, and competitive pricing. The board's structural integrity comes through strongly, with buyers confirming it performs well for flooring, wall sheathing, and general construction.\u003cbr\u003e\u003cbr\u003e\u003cem\u003eSummarised by AI from customer reviews.\u003c\/em\u003e\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"11mm","offer_id":53771574575215,"sku":"4003001","price":16.08,"currency_code":"GBP","in_stock":true},{"title":"15mm","offer_id":53771574607983,"sku":"4003010","price":22.88,"currency_code":"GBP","in_stock":true},{"title":"18mm","offer_id":53771574640751,"sku":"4003002","price":23.76,"currency_code":"GBP","in_stock":true},{"title":"9mm","offer_id":53771574673519,"sku":"4003003","price":13.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9784\/4591\/files\/11mm_structural_OSB_-_Photo_1_-_1920_comp.jpg?v=1783758864","url":"https:\/\/supplyyard.co.uk\/products\/11mm-structural-osb-3-2440mm-x-1220mm","provider":"Supply Yard","version":"1.0","type":"link"}