Detailed design and construction supervision of the existing reinforced concrete buildings of “Cementir” roof during the improvement and upgrading of the filtration system. The changes on the MEP system required several improvement and works from a structural, technical and safety point of view (for example the replacement of the chimney). Several studies on the existing plant and on the documentation have been provided before starting the activities. Moreover, additional inspections, in situ and laboratory tests have been provided to verify and evaluate the materials and the structural conditions.