... 5. easy install The color steel thermal insulation composition panels are used for wall and roof of prefab house, ... , workshop, container house, etc.The width of the sandwich panel is 930mm, and 1,150mm Upper and lower layer ... 3 to 0.6mm Middle: polystyrene foam board, rock wool, fiber glass, PU foam, etc.Thickness: 50mm, 75mm, and 100mm ... it is in low price Thermal Insulation rock wool sandwich Panels