A method for installing a wall jamb for a shower door panel of a showering enclosure includes placing a wall jamb on a shower door panel, the wall jamb having a plurality of legs configured to receive the shower door panel therebetween, a base connecting the plurality of legs such that the wall jamb is generally U-shaped, and a pressure sensitive adhesive disposed at an exterior surface of the base, removing at least a portion of adhesive backing material of the pressure sensitive adhesive, and pushing the shower door panel toward a wall of the showering enclosure such that the pressure sensitive adhesive adheres to the wall of the showering enclosure.