Embodiments herein disclose a riser ring assembly. The riser ring assembly includes a riser ring shim attached to an inner part of a frame, and a gasket placed in a channel formed in the riser ring shim. The gasket maintains a watertight seal between the riser ring shim and the frame. The riser ring shim includes a plurality of paddle lock notches, a plurality of through holes, a plurality of counter sunk holes and a plurality of alignment marks, where dimension of the plurality of through holes is different from dimension of the plurality of counter sunk holes. Further, the riser ring assembly includes a top riser ring attached to an upper part of the frame, and a cover attached to an inner surface of the top riser ring.