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Polycarbonate rooflights (PC_ovenlys) are 10, 20 or 30 mm polycarbonate multiwall rooflights in either vaulted, flat or ridge shape. The outer layer is made in acrylic (PMMA) or polycarbonate material.The upstand is made of either insulated plywood put together in a sandwich construction or as massive rafter wood. For the placing on the market of the product in the European Union/European Free Trade Association (EU/EFTA) (with the exception of Switzerland) Regulation (EU) No. 305/2011 (CPR) applies. The product needs a declaration of performance taking into consideration: and the CE_marking.