A prehung door is a complete door unit that comes already mounted on its frame, including hinges and often the door hardware. Designed for easy installation, prehung doors save time and effort compared to fitting a door and frame separately. They are ideal for both interior and exterior applications, offering a perfect fit and proper alignment, which ensures smooth operation and improved energy efficiency. Available in various materials, styles, and finishes, prehung doors provide a convenient and reliable solution for home renovations and new construction projects.