Double Skin Sandwich Roofing System consists of top and bottom sheet which will have `z` sub-girt and rock wool insulation in between and the whole system is assembled at the site as per site conditions which have flexibility to suit the different shapes of the building and the thickness of the insulation. The System reduces outside noise level tremendously, thereby giving a noise-free working condition inside of the building and is suitable for the structures, factories, commercial buildings, theme parks, etc. The System can be curved and installed regardless of the shape of the structure. The Double Skin Sandwich Roofing System has the feature that heat transmission is reduced.