{"product_id":"18mm-osb3-tongue-groove-board","title":"18mm OSB3 Tongue \u0026 Groove Board","description":"\u003cp\u003e\u003cstrong\u003eQuick answer:\u003c\/strong\u003e 18mm OSB3 tongue \u0026amp; groove board is a strong structural sheet with interlocking edges for continuous decking across supported joists or rafters. It is well suited to flooring, roof decking, loft boarding and other structural deck applications. OSB3 is moisture resistant, not waterproof, so roofing applications must be covered with a suitable weatherproof layer.\u003c\/p\u003e\n\u003ch2\u003e18mm OSB3 T\u0026amp;G board size\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 18mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheet size:\u003c\/strong\u003e 2400 × 600mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge:\u003c\/strong\u003e Tongue \u0026amp; groove\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e OSB3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhere is tongue \u0026amp; groove OSB useful?\u003c\/h2\u003e\n\u003cp\u003eThe interlocking edges help neighbouring boards align and create a continuous deck, making this board particularly useful across larger boarded areas.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlooring and subfloors\u003c\/li\u003e\n\u003cli\u003eRoof decking\u003c\/li\u003e\n\u003cli\u003eLoft boarding and storage decks\u003c\/li\u003e\n\u003cli\u003eSheds, garden rooms and outbuildings\u003c\/li\u003e\n\u003cli\u003eGeneral structural decking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy choose T\u0026amp;G instead of square-edge OSB?\u003c\/h2\u003e\n\u003cp\u003eSquare-edge OSB is ideal where board joints can be fully supported by joists, rafters or noggins. Tongue \u0026amp; groove OSB creates an interlocking joint between adjoining boards, which can make installation neater and more practical across decked areas. The board still needs to be correctly supported and fixed for the application.\u003c\/p\u003e\n\u003ch2\u003eCan 18mm OSB3 T\u0026amp;G be used for roofing?\u003c\/h2\u003e\n\u003cp\u003eYes, where the roof structure and specification call for 18mm OSB3. It forms the roof deck rather than the finished waterproof layer, so it must be covered with a suitable roofing membrane, felt, EPDM or other specified system. Shop \u003ca href=\"\/collections\/roofing-membrane\"\u003eRoofing Membrane \u0026amp; Shed Felt\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eCan it be used for flooring?\u003c\/h2\u003e\n\u003cp\u003eYes. 18mm T\u0026amp;G OSB3 is suitable for many flooring and deck applications where the support spacing, loading and fixing method are appropriate. Allow suitable expansion gaps and follow the requirements of the project.\u003c\/p\u003e\n\u003ch2\u003eBefore ordering\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCheck joist or rafter spacing and the required board thickness.\u003c\/li\u003e\n\u003cli\u003eSupport perimeter edges and board ends appropriately.\u003c\/li\u003e\n\u003cli\u003eAllow suitable expansion gaps.\u003c\/li\u003e\n\u003cli\u003eUse fixings suitable for OSB and the supporting timber.\u003c\/li\u003e\n\u003cli\u003eKeep boards dry and flat before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed standard square-edge board instead? View our \u003ca href=\"\/collections\/osb3\"\u003eOSB Boards \u0026amp; OSB3 Sheets\u003c\/a\u003e. For more guidance, read \u003ca href=\"\/pages\/osb-board-questions-answered\"\u003eOSB Board Questions Answered\u003c\/a\u003e.\u003c\/p\u003e","brand":"Wern-wood","offers":[{"title":"2400 × 600 × 18mm","offer_id":57235379290436,"sku":null,"price":16.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/7068\/7812\/files\/osb-tg4e.webp?v=1789125861","url":"https:\/\/www.wern-wood.com\/products\/18mm-osb3-tongue-groove-board","provider":"Wern-Wood","version":"1.0","type":"link"}