Abstract: A new Building Exterior Fire Prevention System for preventing bush and forest fires from engulfing a building by automatically soaking the building with water after a fire has been detected. The inventive device includes a central processing unit (CPU), a plurality of heat sensors, a solenoid powered control valve connected to a water main, a distribution pipe connected to the control valve and a plurality of sprinklers connected to the distribution pipe. The sprinklers direct water towards the building and towards the ground surrounding the building.