The side channels provide vertical aid for holding the glass panels set up. Measure and mark exactly where the pre-drilled channels should be set up on to the shower walls. Drill pilot holes into the walls employing a masonry drill little bit. Ensure the channels align flush on the partitions. https://ragingbookmarks.com/story18873116/5-tips-about-shower-door-installation-near-newton-ma-you-can-use-today