1:Parameters for Rock Wool Sandwich Roof Panels Steel Outer  LayerCommon T (mm)Outer Panel Specs 0.6-0.8(Coated Steel Panel)  Inner Panel Specs 0.4-0.7(coated steel panel) Common L (mm)≤12,000 Common W (mm)500-1,100 CoatingPVDF/SRP/HDP/ PEInsulation CoreCore MaterialHigh-density thermal ...