Prehung Interior Doors Prehung Interior Doors come as a complete unit, including the door already mounted on its frame with hinges, making installation quick and easy. These doors are ideal for new construction or major renovations, where the existing frame is damaged or nonexistent. Prehung interior doors ensure proper alignment, sealing, and smooth operation, reducing the need for extra carpentry work. Available in various styles, materials, and finishes, they offer a convenient and reliable solution for enhancing the look and functionality of any room.