A lightweight and rigid composite strcuture having high fuel and oil intake resistance developed for an engine chamber cover located in areas that necessitate heat and noise insulation and particularly located in busses, characterized in that it comprises; • An external layer made of linoleum and used on the external surface in order to provide visual compatibility, • A plastic layer obtained from glass reinforced plastic in order to provide a smooth base onto which said linoleum will be adhered to, • A temperature insulation layer formed of polystyrene foam (styrofoam) material, which ensures that the obtained composite strcuture is lightweight and heat tolerant, • A metal layer which is made of a galvanized steel sheet having 1 mm thickness, which ensures that the composite structure to be obtained, such that it aids to bind the used layers together, is rigid, • A noise insulation layer providing noise insulation which is made of mineral filler polymer having 2mm thickness, • A sponge layer made of melamine sponge having a thickness of 10mm, having 150° heat tolerance and 90% noise insulation at 2.000Hz frequency wherein said layer is 50mm thick, • A main layer providing the heat insulation of the composite strcutrue that is to be obtained,- wherein it comprises a glass fibre layer having an aluminium surface that provides heat tolerance at +250° degrees radiation, for a long duration at 40° /+ 180°, • A nail that keeps said noise insulation layer, sponge layer and glass fibre layer together and ensures that it is fixed to the metal layer made of galvanized steel material, • A retaining clip which ensures that the layers forming the composite strcuture that is to be obtained are fixed by means of said nail, and • A cap made of PVC which enables to seal off the extending end of the nail used for fixing. • An external layer made of linoleum and used on the external surface in order to provide visual compatibility, • A plastic layer obtained from glass reinforced plastic in order to provide a smooth base onto which said linoleum will be adhered to, • A temperature insulation layer formed of polystyrene foam (styrofoam) material, which ensures that the obtained composite strcuture is lightweight and heat tolerant, • A metal layer which is made of a galvanized steel sheet having 1 mm thickness, which ensures that the composite structure to be obtained, such that it aids to bind the used layers together, is rigid, • A noise insulation layer providing noise insulation which is made of mineral filler polymer having 2mm thickness, • A sponge layer made of melamine sponge having a thickness of 10mm, having 150° heat tolerance and 90% noise insulation at 2.000Hz frequency wherein said layer is 50mm thick, • A main layer providing the heat insulation of the composite strcutrue that is to be obtained,- wherein it comprises a glass fibre layer having an aluminium surface that provides heat tolerance at +250° degrees radiation, for a long duration at 40° /+ 180°, • A nail that keeps said noise insulation layer, sponge layer and glass fibre layer together and ensures that it is fixed to the metal layer made of galvanized steel material, • A retaining clip which ensures that the layers forming the composite strcuture that is to be obtained are fixed by means of said nail, and • A cap made of PVC which enables to seal off the extending end of the nail used for fixing.