Abstract: A door frame kit for framing an access door comprises metallic channels adapted to cover the four edges of a rectangular panel of material such as siding, sheet rock or the like. The channels include a spine which abuts the panel edge and facie which extend from the spine across a portion of the panel surface. Fingers extending from the ends of the facie portions engage the panel to grasp it, while bolts spaced along the channels draw the facie together against the panel. Corner braces cover abutting ends of channels on adjacent edges, and intermediate braces reinforce the midpoints of long channels. Means for telescopically adjusting the length of horizontal or vertical channels may be included. One or more hinges couple the spine along one edge of each resulting door section to studs framing the access opening, and lock means may attach to the spine opposite the hinge for closing and locking the door.