Maintenance is the combination of all technical, administrative, and managerial actions taken during the life cycle of a building to retain it in, or restore it to, a state in which it can perform its required functions effectively and safely. In the context of building construction and facility management, maintenance ensures that the structural components, finishes, services, and external works of a building continue to operate efficiently, economically, and safely throughout their intended lifespan. It is not merely the act of repairing defects but a systematic process of inspection, servicing, repair, replacement, and improvement carried out to preserve the value and usability of the building asset. Buildings are subject to continuous deterioration due to weathering, wear and tear, aging of materials, poor workmanship, environmental pollution, and usage patterns. Maintenance addresses these issues by preventing minor defects from developing into major structural or functional failures. It includes various types such as routine maintenance, preventive maintenance, corrective maintenance, predictive maintenance, and emergency maintenance. Routine maintenance involves day-to-day activities like cleaning, minor repairs, and servicing of equipment. Preventive maintenance is carried out at scheduled intervals to reduce the likelihood of breakdowns. Corrective maintenance deals with repairs after defects have occurred. Predictive maintenance uses condition-monitoring tools to anticipate failures, while emergency maintenance addresses sudden breakdowns requiring immediate attention. One of the primary functions of maintenance is inspection. Regular inspection of building elements such as foundations, walls, roofs, floors, doors, windows, plumbing systems, electrical installations, and mechanical equipment helps in identifying defects at an early stage. Inspection provides the necessary data to plan timely interventions, allocate budgets, and prioritize repair works. Without systematic inspection, hidden defects may go unnoticed, leading to costly repairs and safety hazards. Another important function is servicing. Servicing involves periodic cleaning, lubrication, adjustment, and testing of building services and equipment to ensure smooth operation. For example, elevators require regular lubrication and testing of safety mechanisms; air-conditioning systems need filter cleaning and gas refilling; plumbing systems require flushing and leakage checks. Servicing extends the life of equipment and maintains performance standards. Repair and replacement constitute a major function of maintenance. When defects such as cracks in walls, leakage in roofs, corrosion of reinforcement,