List of featured suppliers of DOOR FRAMES Entrance on Building Products Index
A door frame is a vertical structure comprised of jambs, header, and sill that supports and surrounds a door opening in a building. An entrance door frame is typically larger and more elaborate than a standard interior door frame, and may include sidelites and a transom. The door frame holds the door in place and provides a secure foundation for the hinges and locking mechanism. It is often made of wood, metal, or a combination of materials and is an essential component of the building envelope.