The side channels give vertical assist for holding the glass panels in place. Evaluate and mark where the pre-drilled channels need to be mounted onto the shower partitions. Drill pilot holes into the walls employing a masonry drill bit. Ensure the channels align flush for the walls. Normally Adhere to https://www.deluxeshowerdoors.com/services/shower-door-installation-near-newton-ma-professional-reliable-service/