How to Tile a Bathroom Floor

Tiling a bathroom floor is one of the more advanced DIY projects, but it is well within reach of a motivated beginner who is willing to prepare carefully and work methodically. The result of a successful DIY tile job is a beautiful, durable floor that saves $500 to $1,500 in labor costs over hiring a professional.

Surface Preparation Is Everything

Tile requires a solid, level substrate to adhere properly and avoid cracking. The existing subfloor must be structurally sound and level to within 1/8 inch over 10 feet. Low spots should be filled with floor leveling compound; high spots should be sanded or ground down. Any movement in the subfloor will eventually crack the tile or the grout, regardless of how well the tile itself is installed.

Plan Your Layout Before You Cut Anything

A dry layout — placing tiles on the floor without adhesive to plan the arrangement — is essential before beginning the actual installation. Start from the center of the room and work outward so that cut tiles at the edges are roughly equal in size on opposite sides. Nothing looks more amateurish than a tiny sliver of tile against one wall and a large piece against the opposite wall.

Grouting and Sealing

Allow the tile adhesive to cure fully — typically 24 hours — before grouting. Mix grout to a peanut butter consistency, spread with a rubber float held at a 45-degree angle, and work the grout into the joints in multiple directions. Remove excess grout from the tile surface with a damp sponge before it fully hardens. After grout cures (24 to 48 hours), apply grout sealer to prevent staining and moisture penetration.