How to Install Tile Flooring: From Start to Finish

Choosing Your Tile

Tile flooring is one of the most durable and versatile flooring options available. Ceramic and porcelain tiles are the most common choices for residential applications. Ceramic tile is made from clay fired at lower temperatures, is slightly softer, and costs less. Porcelain tile is fired at higher temperatures, is denser and harder, and is suitable for both indoor and outdoor use. Natural stone tiles (marble, granite, travertine, slate) offer unique beauty but require more maintenance and sealing.

When selecting tile, consider the PEI (Porcelain Enamel Institute) wear rating. PEI 1 is suitable for walls only. PEI 2 works for light residential foot traffic like bathrooms. PEI 3 handles all residential traffic. PEI 4 is for commercial applications. PEI 5 is for heavy commercial and industrial use. Also check the coefficient of friction (COF) for slip resistance, especially in wet areas. Use our Tile Pattern Calculator to estimate quantities for your project.

Surface Preparation

The substrate (surface beneath the tile) must be clean, flat, dry, and structurally sound. For wood subfloors, add a cement backer board (1/2 inch thick) screwed every 8 inches into the joists. Tape the seams with alkali-resistant mesh tape and thinset. For concrete slabs, fill any cracks with appropriate repair material and grind high spots flat. The floor should not vary more than 1/4 inch in 10 feet.

Layout is critical for a professional result. Find the center of the room and snap perpendicular chalk lines. Start tiling from the center outward so cuts fall at the edges where they are less visible. Dry-lay a row of tiles along each chalk line to check the layout and adjust as needed. The goal is to have tiles at the walls of roughly equal width on both sides, avoiding narrow cuts less than 2 inches wide.

Setting the Tile

Mix thinset mortar according to the manufacturer instructions. It should have a consistency similar to thick peanut butter. Spread thinset on the floor using a notched trowel (1/4 x 3/8 inch V-notch for most wall tile, 1/2 inch square-notch for floor tile). Hold the trowel at a consistent 45-degree angle to ensure even ridges.

Set each tile with a slight twisting motion to ensure full contact with the thinset. Check periodically by pulling up a tile to verify coverage (should be at least 95%). Use tile spacers to maintain consistent grout lines. Work in small sections (3x3 feet) so the thinset does not skin over before the tiles are set. Clean any thinset from the tile faces immediately with a damp sponge.

Grouting and Sealing

Wait at least 24 hours for the thinset to cure before grouting. Remove the spacers and clean any thinset from the grout joints. Mix grout according to package directions and apply using a rubber grout float at a 45-degree angle to the joints. Work the grout into the joints fully, then hold the float at nearly 90 degrees to scrape off excess. Clean the tile surface with a damp sponge, rinsing frequently. After the grout dries (1-2 hours), buff off any haze with a clean dry cloth.

Apply grout sealer 48-72 hours after grouting to protect against staining. For natural stone tiles, apply an impregnating sealer before grouting to prevent grout staining the stone, and a topcoat sealer after installation for ongoing protection. Properly installed and maintained tile flooring can last 50 years or more with minimal maintenance.