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Thanks to its metal building enveloping departement, Marcegaglia Buildtech can offer the market a wide range of insulated panels for roofs, walls, sectional doors and corrugated sheets. The range is enhanced with insulated panels for special applications, including cold rooms (refrigerator panels), sound-absorbing panels and insulated roofing panels. The products considered in this study are commonly referred to as sandwich panels and consist of a composite panel of one or two sheet metal faces (mainly steel, but also aluminium) joined together by a core of expanded polyurethane foam or glued mineral wool. In particular, the following are examined: • insulated wall panels with PIR/PUR insulating material; • insulated roofing panels with PIR/PUR insulating material; • insulated wall panels with mineral wool insulating material; • insulated roofing panels with mineral wool insulating material; • insulated wall panels with sound-absorbing mineral wool insulating material; • insulated roofing panels with sound-absorbing mineral wool insulating material.