Abstract: A self-adjusting weather strip comprised of: a main aluminum extrusion having a flat elongate base plate with an integral channel therealong, said channel being rectangular in cross section and having an elongate opening along one side thereof; a second elongate aluminum extrusion configured generally as an I beam in cross section, one cross bar of the I being approximately square in cross section and being adapted to be slidably received in the channel of said main extrusion with the stem of the I passing through said elongate opening thereof, the other cross bar of said I having means to retain an elongate weather strip facing member; and a plurality of curved bar springs within said channel between the side thereof opposite said elongate opening and the square of said I.