The Best Way to Grout Countertops

Grout a tile countertop with Portland cement-based grout for the best results.

Grouting is one of the most important steps in installing a tile countertop. Without the proper preparation, the countertop may be damaged by moisture or food. According to the Tile Doctor, the best way to grout a countertop is to use Portland cement-based grout, as it provides an effective barrier against moisture. With the correct tools, properly grouting your tile countertop can be completed in an afternoon, but curing takes approximately three days.

Things You'll Need

• Razor knife
• Portland cement-based grout
• 2-gallon bucket
• Sponge
• Hard rubber grout float

Instructions

1. Ensure that there is no adhesive remaining in the gaps between the tiles. Any adhesive that is left will compromise the stability of the grout. Scrape adhesive from the gap with a razor knife.

2. Combine Portland cement-based grout and water in a 2-gallon bucket according to the manufacturer's directions. When properly mixed, the grout should be the consistency of pancake batter.

3. Dampen the joints between the tiles in an area approximately 2 to 3 square feet. Work in small sections, because the grout begins the curing process soon after it is applied. Use a damp sponge to moisten the joints but do not leave water puddled in them.

4. Apply the grout to the joints using a hard rubber grout float. Hold the float at a 45-degree angle to help push the grout into the joints. Move the float back and forth over the joints to ensure they are completely filled with the grout. If there are areas that are not filled, add a bit more grout and push it into the joints.

5. Pull the grout float back across the joints, holding it at a 45-degree angle to remove excess grout from the surface. Discard the excess grout but do not put it back into the bucket, as it may have contaminants from the surface of the tile.

6. Sponge off the surface of the tile countertop with a dampened sponge. Use just enough pressure to pull the sponge diagonal to the tiles to clean the surface without gouging into the grouted joints. Strive for a smooth finish on the grouted joints and a clean surface on the tiles.

7. Continue until all the joints are grouted. Allow the grout to cure for 72 hours before using the countertop to avoid damaging the grout.

References

• The Tile Doctor: Tile Installation - Grouting Countertops