Just before 1200 hrs E-1 was responding to a reported 2nd due residential fire. While responding, a 1st due fire was dispatched on Sycamore Hill Ln. E-1 diverted and arrived with heavy smoke from all sides of the single story dwelling. Crews from the Wagon and Engine encountered a missing floor once in the structure and this made it difficult to reach the rest of the fire. The fire was brought under control within 20 minutes but the Wagon crew didn't clear until 1611 hrs after assisting the state police investigators.