About Door Sweeps
Door sweeps are add-on door hardware that, like hinges, exit devices, or door closers, serve a particular function in the operation of the door. Bottom door sweeps (also known as a "door sweep brush"), are literally a brush or single fin blade made of flexible rubber. The sweep runs the width of the door and seals the small space between the bottom of the door and the threshold or floor against dirt, moisture, and insects. Along with weatherstripping that contours the door frame in the space between the door and the frame, door sweeps also help to reduce heating and cooling costs.