Preservation and maintenance of buildings and premises, owned, granted or rented, of Sociedad Estatal de Correos y Telégrafos S.A. in Galicia, including all the actions and repairs as regards air conditioning, electricity, gas and water, premises surveillance systems, as well as data processing centres, lifts, storage lifts, and building elements such as staircases, doors and windows, closings, facades, covers and terraces, among others.