1. A kit for framing an opening in a building, wherein the opening is for a door, the opening having a frame portion, a first side and a second side, the kit comprising a plurality of pieces, the plurality of pieces comprising: a head trim to abut the first side; a pair of profiles to abut the first side, the head trim couplable with the pair of profiles with a friction fit; a pair of side jambs to abut the frame portion, the side jambs respectively couplable with the pair of profiles with a friction fit; a head jamb to abut the frame portion, the head jamb couplable with the head trim with a friction fit, and the head jamb couplable with the side jambs with a friction fit; a head trim to abut the second side, the head trim couplable with the head jamb with a friction fit; a pair of profiles to abut the second side, the head trim couplable with the pair of profiles with a friction fit, the pair of profiles respectively couplable with the pair of side jambs with a friction fit, wherein at least one of the plurality of pieces includes: a tongue adapted to insert into a groove in the opening; and an outer flange that extends in a common direction with the tongue and spaced from the tongue by an amount corresponding to a portion of the opening between the groove and a surface of the door frame, wherein the spaced amount is adapted to cause the at least one piece to engage with the portion of the door frame with a friction fit when the tongue is inserted into the groove and the outer flange simultaneously presses against the exterior surface.