... . easy instal The color steel high quality wall sandwich roof panels are used for roof of prefab house, steel ... structure warehouse, factory, workshop, container house, etc.The width of the sandwich ... plate: 0.3 to 0.6mm Middle: PU board, EPS foam, rock wool, fiber glassThickness: 50mm, 75mm, and ... and it is in low price Color Steel EPS Sandwich Panels