The Side channels offer vertical help for holding the glass panels in place. Evaluate and mark exactly where the pre-drilled channels need to be mounted onto the shower walls. Drill pilot holes into the walls employing a masonry drill little bit. Make sure the channels align flush to the walls. https://showerdoorinstallationnew71479.thenerdsblog.com/38547581/the-smart-trick-of-shower-door-installation-in-newton-ma-that-nobody-is-discussing