The National Maritime Museum, officially called the Admiral Luis Uribe Orrego Building, was inaugurated in 1893 and was declared a National Monument, in the category of Historical Monument, in 2012. The intervention carried out in this first phase includes the necessary repair and reinforcement of the roof, covering an approximate area of 17,000 sf. The work consists of the dismantling of the roofs, reinforcement and stabilization of existing trusses, replacement of roof decking, gutters and downspouts. We have acted in coexistence with the daily activity of the Museum, maximizing security measures and protection against the inclement weather. Additionally, firebreaks have been placed in the angles encounters and the southwest corridor has been reinforced, by repairing existing structural deviations caused by overloading on the roof.