In short: the door frame is the structural surround that holds a door in place, consisting of two vertical jambs and a horizontal header. Its width is the clear opening between the jambs, which for standard residential doors runs approximately 2 inches wider than the door slab — a 32-inch slab fits a frame of about 34.5 inches. Frame height accommodates the door slab plus clearance, and jamb depth must match the finished wall thickness. These dimensions are interrelated, and specifying them correctly requires knowing whether you are working with the rough opening, the finished frame, or the door slab.
As a door and window manufacturer, our approach to frame dimensioning is straightforward: we build frames to match the door slab, the wall assembly, and the local building code requirements of your target market. Our factory produces custom-sized door frames and pre-hung units for both interior and exterior applications, and we can adjust profile structures and fittings to suit regional standards. If you are working with non-standard openings or need frames that meet specific accessibility or performance requirements, Get a Free Quote and our team can confirm the exact dimensions for your project.
