... and wall with steel structure. Good Quality, Low cost. EPS Foam Sandwich Panel (expanded polystyrene)Advantages:Light weight, high strength, good ... buildings or prefab house as wall or roof systemAlso PU(polyurethane), rockwool, glasswool sandwich panel are for your choice.Structural panels ... .326, 0.376, 0.426, 0.476, 0.5mm) EPS foam sandwich panel