How to Install Subway Tile in Your Shower

Subway tile remains the gold standard for bathroom renovations because of its clean, timeless geometry and incredible durability. When done correctly, a tiled shower wall creates a seamless moisture barrier that protects your home for decades. The project relies entirely on the precision of your substrate preparation and the patience you exercise while setting the initial course. Great tile work is defined by the quality of your layout. You are not just sticking pieces of ceramic to a wall; you are building a vertical grid that needs to account for corners, plumbing fixtures, and the inevitable slight variations in wall plumb. Once you master the rhythm of setting, spacing, and leveling, the process becomes meditative and incredibly rewarding.

  1. Waterproof Your Foundation. Ensure your cement board is installed flush and screwed down every 8 inches into the studs. Apply waterproof membrane tape to all joints and coat the entire board with liquid waterproofing sealer.
  2. Find Your Center Line. Find the center of your wall and draw a vertical plumb line. Measure from the floor up to the height of one tile plus the spacer, and draw a level horizontal baseline.
  3. Spread Mortar Strategically. Mix your thin-set mortar to a peanut butter consistency in small, manageable batches. Apply to the wall using a notched trowel, holding it at a 45-degree angle to create consistent ridges.
  4. Press and Space With Precision. Press the tiles firmly into the mortar with a slight twisting motion to collapse the ridges. Use tile spacers at every corner to maintain uniform grout lines.
  5. Cut and Fit Edge Pieces. Measure the distance between your last full tile and the wall corner, subtract 1/8 inch for expansion, and cut tiles using a wet saw. Fit these pieces into the edges to complete the run.
  6. Fill and Shape the Joints. Once the thin-set cures for 24 hours, remove spacers and apply grout using a rubber grout float held at a 45-degree angle. Push the grout deep into the joints, then wipe excess away with a damp sponge.