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Sandwich Panel Metal Roof Insulated Rock Wool Core China. High-Performance Insulated Roof High-density rock wool core with low thermal conductivity cuts heating and cooling costs year-round and prevents interior condensation, protecting goods and equipment. Wide Profile, Fewer Seams, Built to Last Reduced roof seams speed installation and lower labor cost; the weather-tight joint delivers reliable watertight performance and wind uplift resistance for d. CE & ISO Certified, One-Source Roof Supply Fire, thermal, and mechanical performance verified by our CNAS-accredited laboratory; the roof pairs with GloStar wall panels and steel frames for a comple.