POWIN STEEL PU Metal Insulated Metal Roofing is manufactured by bonding CFC-free Rigid Polyurethane (PU) foam between exterior and interior skin of profiled metal roofing sheets. It’s double metal steel sheet provides a very effective heat insulation, soud absorption, and extra protection for the PU form. POWIN STEEL PU Metal Insulated Metal Roofing is widely used in building industries, ie. factories, warehouse, hawker centres, schools, residential houses and etc.