1:Parameters for Over Lap Type PIR PU PUF Roof Sandwich Panels       Steel Outer Layer    Common Thickness(mm)Outer Panel Specs 0.6-0.8(Coated Steel Panel)Outer Panel Specs 0.4-0.7(Coated Steel Panel)Common Length(mm)≤12000Common Width(mm)950mmCoatingPVDF/SRP/HDP/PE&n...