While the station was staffed with three crews the Engine and Tower were dispatched as 4th due engine and 2nd due tower to 9499 Lanham Severn Road for the building fire. While responding with 11 volunteers PSC advised all unit PD was on scene with fire showing from the roof. Chief 33A arrived on scene and was given the interior supervisor position. As Engine and Tower 33 arrived both units reported to Side C where smoke was showing from the roof line. The crews form 33 went to the roof to open up and extinguish fire found in the roof area. Units went ready after 30 minutes.