{"product_id":"csm-450g-per-metre","title":"CSM 450g (per metre)","description":"\u003cp data-start=\"1052\" data-end=\"1373\"\u003e\u003cstrong data-start=\"1052\" data-end=\"1085\"\u003e450g Chopped Strand Mat (CSM)\u003c\/strong\u003e is the most commonly used reinforcement within GRP fibreglass roofing systems. Manufactured from \u003cstrong data-start=\"1183\" data-end=\"1266\"\u003eE-glass fibres randomly distributed and bonded together with an emulsion binder\u003c\/strong\u003e, the mat provides the structural reinforcement of the laminate when combined with polyester roofing resin.\u003c\/p\u003e\n\u003cp data-start=\"1375\" data-end=\"1673\"\u003eThe \u003cstrong data-start=\"1379\" data-end=\"1461\"\u003e450g grammage refers to the weight of glass fibres per square metre of matting\u003c\/strong\u003e. In GRP roofing systems, the structural strength of the finished laminate comes from the \u003cstrong data-start=\"1551\" data-end=\"1624\"\u003ecombination of chopped strand glass reinforcement and polyester resin\u003c\/strong\u003e, as resin on its own becomes brittle once cured.\u003c\/p\u003e\n\u003cp data-start=\"1675\" data-end=\"1868\"\u003e450g matting is widely used as the \u003cstrong data-start=\"1710\" data-end=\"1763\"\u003estandard glass weight across the roofing industry\u003c\/strong\u003e, providing an excellent balance of strength, durability and workability for most flat roof applications.\u003c\/p\u003e\n\u003cp data-start=\"1870\" data-end=\"2109\"\u003eCompared with heavier reinforcement such as \u003cstrong data-start=\"1914\" data-end=\"1941\"\u003e600g chopped strand mat\u003c\/strong\u003e, the 450g version is \u003cstrong data-start=\"1963\" data-end=\"2052\"\u003emore malleable and easier to work around roofing trims, corners, outlets and upstands\u003c\/strong\u003e, making it particularly suited to roofing installations.\u003c\/p\u003e\n\u003cp data-start=\"2111\" data-end=\"2486\"\u003eThe consistent fibre distribution allows for \u003cstrong data-start=\"2156\" data-end=\"2208\"\u003efast wet-out and easy resin flow through the mat\u003c\/strong\u003e, helping installers bring the resin through the laminate efficiently. This promotes good consolidation, reduces trapped air and produces a high quality laminate surface which \u003cstrong data-start=\"2384\" data-end=\"2485\"\u003efacilitates topcoat application and helps achieve strong adhesion and full topcoat colour opacity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2488\" data-end=\"2696\"\u003eAs a general guide for roofing laminates, installers typically use \u003cstrong data-start=\"2555\" data-end=\"2639\"\u003eapproximately 1.5kg of resin per m² when laminating with 450g chopped strand mat\u003c\/strong\u003e, including an allowance for normal installation wastage.\u003c\/p\u003e\n\u003cp data-start=\"2698\" data-end=\"2918\"\u003eThis \u003cstrong data-start=\"2703\" data-end=\"2740\"\u003e450g chopped strand mat per metre\u003c\/strong\u003e option allows installers to purchase the exact length required, making it ideal for \u003cstrong data-start=\"2825\" data-end=\"2875\"\u003erepairs, small roofing projects or detail work\u003c\/strong\u003e without needing to purchase a larger roll.\u003c\/p\u003e\n\u003chr data-start=\"2920\" data-end=\"2923\"\u003e\n\u003ch2 data-section-id=\"1ihnine\" data-start=\"2925\" data-end=\"2943\"\u003eSizes Available\u003c\/h2\u003e\n\u003cp data-start=\"2945\" data-end=\"3039\"\u003e450g chopped strand mat is available in multiple sizes to suit different project requirements:\u003c\/p\u003e\n\u003cul data-start=\"3041\" data-end=\"3153\"\u003e\n\u003cli data-section-id=\"vblmjt\" data-start=\"3041\" data-end=\"3070\"\u003e\n\u003cp data-start=\"3043\" data-end=\"3070\"\u003e\u003cstrong data-start=\"3043\" data-end=\"3068\"\u003eFull Roll – 73 metres\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"fgasbc\" data-start=\"3071\" data-end=\"3100\"\u003e\n\u003cp data-start=\"3073\" data-end=\"3100\"\u003e\u003cstrong data-start=\"3073\" data-end=\"3098\"\u003eHalf Roll – 36 metres\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"oiog1v\" data-start=\"3101\" data-end=\"3133\"\u003e\n\u003cp data-start=\"3103\" data-end=\"3133\"\u003e\u003cstrong data-start=\"3103\" data-end=\"3131\"\u003eQuarter Roll – 18 metres\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dyrczq\" data-start=\"3134\" data-end=\"3153\"\u003e\n\u003cp data-start=\"3136\" data-end=\"3153\"\u003e\u003cstrong data-start=\"3136\" data-end=\"3153\"\u003eCut per metre\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3155\" data-end=\"3350\"\u003eFor heavier reinforcement requirements, \u003cstrong data-start=\"3195\" data-end=\"3233\"\u003e600g heavy duty chopped strand mat\u003c\/strong\u003e is also available in \u003cstrong data-start=\"3255\" data-end=\"3292\"\u003equarter, half and full roll sizes\u003c\/strong\u003e (metre lengths differ due to the increased glass weight).\u003c\/p\u003e","brand":"ALL","offers":[{"title":"Default Title","offer_id":37519416131747,"sku":"CSM450","price":2.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0525\/6160\/8867\/products\/IMGL0471-F450_23a0aa5c-2c3e-4117-8a32-f90a7d44b002.jpg?v=1659003045","url":"https:\/\/fibreglassroofkits.com\/products\/csm-450g-per-metre","provider":"Fibreglass Roof Kits","version":"1.0","type":"link"}