A building with limited interior structure burns much faster than one with hallways and closed doors. Hence in our picture why the floors are black in the first picture. The walls and doors trap the fire and prevent the flames and smoke from spreading to other parts of the house. While the fire will eventually burn through the structure and continue to spread if left to its own devices. This is a disaster fire that happened to an insurance office. If your home or business has succumbed to the destructive forces of a rampaging fire, and you need help contact SERVPRO St.Louis Central.