The answer comes to give the top Galvalume Plus®.

American steel patent with high aluminum content, the Galvalume Plus® helps us to keep the interior of our buildings cool.Moreover, the deep grooves of the prefabricated cross sections (panels), which give the feeling of three-dimensional faces, leave less exposed surface and combined with the excellent performance of the material ensure up to 85% heat reflection. Combined with proper ventilation you now have a pleasant environment, without the use of a thermal insulation system.