wall and roof Sandwich panels 1.easy installation, safe use 2.low cost, ... proofing, heat insulation 3.cycling use wall and roof Sandwich panels: Steel Thickness0.35~0.8 mmPanel thickness50/75/100 ... steel sheet,(2)the inner layer is rock wool sandwich,(3)the bottom layer is also steel sheetRockwool density100- ... by shipping Container or according to your demands Sanwich panel/ roof sandwich panel