GRP Standard 3 Grey Roof Sheet (Class 3 - 2.4kg/m2) - 1830mm Filon Double Reinforced roof sheets are manufactured with one additional reinforced woven glass layer compared with conventional GRP rooflights. This product has a high quality UV inhibiting protection system to the weather face and has impact resistance and load bearing capabilities in excess of heavier standard weight production CE30E (approx 3.0kg/m2) whilst maintaining a relatively thin sheet with excellent profile definition. Fire rating is Filon grade 300 AB Class 3 to BS 476 Parts 3 and 7. FILON roof sheets are manufactured from glass reinforced polyester resin (GRP).They are available in over 900 different profiles, to match all current and most discontinued asbestos cement and metal roofing profiles. FILON GRP roof sheets may be used in single skin and double skin site assembled applications and where necessary, including insulating intermediate layers to provide improved insulation levels for compliance with current legislation. FILON GRP roof sheets are available in various weights including 1.83kg/m², 2.44kg/m², 3.06kg/m² and 3.66kg.m². FILON roof sheets have excellent impact resistance and are supplied with a highly durable UV resistant polyester film to the weather face. This extends the durable working life of the sheet and the UV resistance limits sheet yellowing. Under normal conditions, sheet life should be in excess of 30 years.