This may seem a bit simplistic, but I am always surprised when I ask someone to close their eyes and hand this prop to them. After I hand them the hose I ask which way they would go to get out of a building?
As an officer that will be making the initial decisions on this building you have a great responsibility to know as much about this structure as you can. It will certainly help you to make the best possible decision about your tactics.
By lifting the tiles and breaching the ceiling, we know how far the fire has advanced before committing people into these buildings. The concealed spaces are important for initial fire attack in these situations. It might indicate that the front door is as far as you go.