... cheap, economical building material 3.used for dorm, office, warehouse, fence, factory,workshop Widely used in common steel structure and storey ... corePolystyrene(EPS) polyurethane(PU), rockwoolAdvantages1. Light weight,Very easy to install, disassemble and move. 2. High strength and stiffness, high ... coated steel plate Sandwich Panel colourbond for roof wall fence prefab house and steel structure