Install Bathroom Shower Tile

Tile transforms a shower from builder-grade to custom-grade, and the work itself follows a rhythm older than your house. You're layering waterproof substrate, adhesive, tile, and grout in a specific sequence that either sheds water for decades or fails within months. The difference comes down to prep work you can't see once the tile is up. Most shower failures happen behind the tile, not on its surface, which means your real work happens before you ever open a box of tile. A properly tiled shower should outlast your mortgage. Rushed waterproofing or skipped steps create problems that announce themselves as ceiling stains in the room below, usually on a Sunday morning when you're having coffee. The project spans two weekends if you're methodical. First weekend covers demo, backer board installation, and waterproofing membrane. Second weekend is tile setting and grouting. You need three separate cure times: 24 hours after backer board, 24 hours after thin-set, 48 hours after grout. Plan accordingly. The tile itself is the easy part. Everything underneath determines whether you're doing this once or twice.

1. Strip to the Studs. Shut off water to the shower and remove fixtures. Use a hammer and cold chisel to break out old tile, working from top to bottom. Remove all tile, old thin-set, and any damaged drywall down to the studs. Check studs for water damage or mold—replace any compromised wood before proceeding. Vacuum dust and debris thoroughly.
2. Build the Foundation. Cut 1/2-inch cement backer board to fit wall sections using a utility knife and straight edge. Screw boards to studs every 8 inches using 1-1/4 inch backer board screws, keeping screws 3/8 inch from edges. Stagger seams and leave 1/8-inch gaps between sheets. Cover seams with fiberglass mesh tape embedded in thin-set mortar. Let cure 24 hours.
3. Seal Against Water. Roll or brush liquid waterproofing membrane onto all backer board surfaces, paying extra attention to corners and seams. Apply two coats, allowing first coat to dry per manufacturer specs before second coat. Extend membrane 6 inches beyond shower area on all sides. Membrane should be tacky but not wet before tiling.
4. Map Your Pattern. Dry-fit your bottom row to determine spacing and cuts needed. Use a 4-foot level to mark a level line for your second row—the floor isn't level, so don't use it as a guide. Install a temporary ledger board on this line to support tiles while thin-set cures. Plan vertical layout to minimize cuts at ceiling height.
5. Apply Even Adhesive. Mix modified thin-set to peanut butter consistency using a drill and paddle mixer. Apply thin-set to a 3x3 foot section using the flat side of a 1/4-inch notched trowel, then comb with the notched side at 45-degree angle. Ridges should stand uniform and tall. Work in sections small enough to tile within 15 minutes.
6. Lock in Perfect Lines. Press each tile into thin-set with a slight twist, using spacers to maintain consistent grout lines. Check level every three tiles horizontally and vertically. Tap high tiles gently with a rubber mallet. Remove any thin-set that squeezes into grout joints immediately. Work from bottom to top, completing full sections before moving up.
7. Finish the Edges. Measure and cut edge tiles using a wet saw, wearing safety glasses and hearing protection. For outlet or fixture penetrations, use a tile nipper for small notches or a hole saw for clean circles. Set cut tiles carefully—they're more fragile. Remove spacers after 4 hours but before thin-set fully hardens. Allow 24 hours cure time before grouting.
8. Finish and Protect. Mix sanded grout to toothpaste consistency and pack into joints using a rubber float at 45-degree angle. Work diagonally across tiles. After 15 minutes, wipe away haze with a damp sponge, rinsing frequently. Let grout cure 48 hours, then apply penetrating grout sealer with a foam brush. Buff away excess sealer after 10 minutes.