Input the mass of fixing screws based on the surface area of the product, expressed in g/m². By default, the mass of the screws is assumed to be 3.94 g/m² in standard areas. The mass of a standard screw is 3.5 g. According to the technical advisory notices in force, it requires 9 screws to secure 8 m² of roofing sandwich panels. The number of fixing screws required is 1.125 screws/m². For further information, consult the technical advisory notice for the process.