{"product_id":"grp-fibreglass-matting-450gsm-600gsm","title":"GRP Fibreglass Matting – 450gsm \u0026 600gsm","description":"\u003ch3\u003eChopped Strand Mat for GRP Roofing Systems\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eGRP Fibreglass Matting (CSM)\u003c\/strong\u003e is the reinforcing layer used within traditional fibreglass roofing systems. When combined with polyester resin, it forms the structural laminate that gives a GRP roof its strength and durability.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in \u003cstrong\u003e450gsm and 600gsm weights\u003c\/strong\u003e, sold per square metre.\u003c\/p\u003e\n\n\u003cp\u003eSuitable for use within systems such as \u003cstrong\u003e\u003ca href=\"\/products\/restec-grp-roof-1010-base-coat-resin\"\u003eGRP Roof 1010\u003c\/a\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003ca href=\"\/collections\/cromar-pro-grp\"\u003ePro GRP\u003c\/a\u003e\u003c\/strong\u003e and other standard GRP roofing applications.\u003c\/p\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative;\"\u003e\n    What It’s Used For\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cul\u003e\n      \u003cli\u003eForming the reinforced laminate layer in GRP roofs\u003c\/li\u003e\n      \u003cli\u003eNew flat roof installations\u003c\/li\u003e\n      \u003cli\u003eBalcony and terrace waterproofing\u003c\/li\u003e\n      \u003cli\u003eRepair and overlay works\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eThe mat is saturated with catalysed resin, which breaks down the binder and allows the fibres to bond together, forming a solid, glass-like membrane once cured.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative;\"\u003e\n    Choosing the Right Weight\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003e\u003cstrong\u003e450gsm – Standard Grade\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eSuitable for most domestic flat roofs\u003c\/li\u003e\n      \u003cli\u003eIdeal for general applications\u003c\/li\u003e\n      \u003cli\u003eDesigned for light foot traffic\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003e\u003cstrong\u003e600gsm – Heavy Duty Grade\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eThicker, more durable laminate\u003c\/li\u003e\n      \u003cli\u003eSuitable for balconies and terraces\u003c\/li\u003e\n      \u003cli\u003eRecommended where regular foot traffic is expected\u003c\/li\u003e\n      \u003cli\u003eProvides increased impact resistance\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003eSelecting the correct weight ensures the finished membrane matches the demands of the roof area.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative;\"\u003e\n    Installation Overview\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cul\u003e\n      \u003cli\u003eCut mat to size allowing minimum 50mm overlaps.\u003c\/li\u003e\n      \u003cli\u003eApply catalysed resin to the substrate.\u003c\/li\u003e\n      \u003cli\u003eLay mat into wet resin.\u003c\/li\u003e\n      \u003cli\u003eFully consolidate using a paddle roller until evenly saturated.\u003c\/li\u003e\n      \u003cli\u003eApply extra catalysed resin on top where required.\u003c\/li\u003e\n      \u003cli\u003eEnsure no dry fibres remain before curing.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eAlways follow the relevant GRP system coverage rates and catalyst guidance.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative;\"\u003e\n    Technical Specification\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cul\u003e\n      \u003cli\u003eType: Emulsion-bound Chopped Strand Mat (CSM)\u003c\/li\u003e\n      \u003cli\u003eWeights Available: 450gsm \/ 600gsm\u003c\/li\u003e\n      \u003cli\u003eSold: Per metre\u003c\/li\u003e\n      \u003cli\u003eCompatibility: Polyester GRP roofing systems\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; position:relative;\"\u003e\n    Summary\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%);\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eGRP Fibreglass Matting (450gsm and 600gsm) forms the reinforced layer within a fibreglass roofing system. Used with polyester resin, it creates a strong, seamless and durable GRP membrane suitable for flat roofs, balconies and terraces.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e","brand":"The Flat Roofing Shop","offers":[{"title":"450g","offer_id":56677291983179,"sku":"PG-Matting-450","price":2.38,"currency_code":"GBP","in_stock":true},{"title":"600g","offer_id":56677292015947,"sku":"PG-Matting-600","price":3.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/4054\/9451\/files\/grp-fibreglass-matting.jpg?v=1774174772","url":"https:\/\/theflatroofingshop.co.uk\/products\/grp-fibreglass-matting-450gsm-600gsm","provider":"The Flat Roofing Shop","version":"1.0","type":"link"}