SUMMARY
All the regulations of our legal framework, starting with the generalist one, as the Civil Code, to the specific of the construction sector, as the LOE for example, require the owners and the users to maintain the buildings in a state of conservation that keeps out of risk the people who use it. A series of periodically programmed activities are deduced of the technical regulations set of the building systems, which form the Plan of Legal Preventive Maintenance of the Building. This Plan contemplates the intervention in the system parts where the failures can cause important damages for the health of the users (elevators, boilers, etc.) or high economic impact injuries (façades, covers, etc). The real truth is that good maintenance practices implemented in buildings with other uses (industrial, hospital, public, etc.) are not transferred to residential buildings, despite forming the largest group of all of them. Several negative circumstances arise from the above considerations: deferred maintenance becomes corrective one with the high economic costs associated with the added values of urgency and opportunity, systems and materials life cycle reduction trigger the renewal; the owner’s liability to third parties’ damag-es increases and the insurance policy contracted not always covers all situations where exist a clear lack of functions. The role of the Building Engineering graduate must be fundamental in all the processes related to the building maintenance. The university education offers the knowledge in the characteristics of the materials and constructive systems, as well as the criteria of durability and the mecha-nisms through which pathological processes initiate. Therefore, it is able to interpret the injuries and damages that appear and to plan the necessary corrective actions. Making a comparison with medicine field, buildings need a doctor who recognizes their condition in the first instance and who knows to diagnose and cure if necessary, or to send to a specialist treating it. That "head technician" is the building graduate. The importance of the sector for companies and technicians, its size, its practices and its development and expecta-tions, deals with this communication.