All ships have scrupulous maintenance logs, and so should buildings. The logs show precisely what was done, when, and by whom. They also schedule the routines of periodic inspection, servicing, and preventive maintenance. In buildings the record of work done can sometimes be attached to the point of work, such as servicing tags on equipment. A room’s paint, wallpaper, and carpet specifications can be taped to the inside of a light switch cover in the room. Old lead roofs customarily have the date of their installation marked in them, along with the name of the “plumber” who did the work, and
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