Abstract: A kit for preventing the movement of door frames during the time that brick and mortar are being erected around the frames. As one element of the kit, there is at least one block which fits between the door jambs to prevent inward or outward bowing of the jambs. The blocks contain peripheral holes which contain protective clips. The blocks may be tied in place at the desired location by passing a tie through the appropriate holes and around the doorjamb. A second element of the kit is at least one supporting brace which prevents movement of the door frame away from the vertical plane of the frame. The brace contains connecting holes at each end and, preferably, is made of telescopic tubing for ease in adjustment of length. The lower portion of the brace rotatably connects to a support. The upper end of the brace rotatably connects to a two-piece holder which removably attaches to a door jamb.