How to Install a Glass Shower Door

SHOWER DOORS are the centerpiece of a bathroom renovation, transforming a utilitarian space into a functional retreat. A properly installed door shouldn't just look clean; it must operate smoothly without scraping against the threshold or dragging on the floor tile, and it must manage water runoff effectively. Achieving a professional result requires extreme patience with your measurements and your level. Because shower openings are rarely perfectly square, your success depends on how well you compensate for wall irregularities during the initial mounting of the hardware. Done well, your door will hang perfectly plumb and glide or swing with ease for years to come.

Mark Your Lines First. Measure the width of the opening at the top, middle, and bottom, using the narrowest measurement for your cut. Use a level to mark the plumb line on the wall where the jambs or hinges will mount.
Find Hidden Studs Fast. Identify the wall studs behind the tile near your marked lines. If you cannot align with a stud, use high-quality toggle bolts or anchors specifically rated for tile and backer board.
Lock Hardware Down Plumb. Drill pilot holes through the tile using a diamond-tipped bit, then secure the jambs or hinges to the wall. Check the vertical level on every single attachment point as you tighten the screws.
Secure the Bottom Seal. Clean the shower floor surface thoroughly with denatured alcohol to remove all soap scum. Apply a bead of silicone and set the threshold or bottom seal track in place, ensuring it is perfectly centered.
Hang Glass Carefully. Carefully lift the glass door and seat it into the hinges or track. With a partner, adjust the door to ensure it clears the threshold and sits square within the frame before tightening all fasteners.
Seal All Seams Watertight. Run a continuous bead of mildew-resistant silicone caulk along the interior perimeter of the frame where it meets the walls and floor. Smooth the bead with a damp finger and let it cure for 24 hours.