mix grout according to manufacturer
push grout into joints with float
open joint will be covered by a wood base
Grout the Tile
Including the borders, this floor has four different color tiles. Because of its color, a tan grout (Image 1) that complemented each color tile was chosen. Mix the grout according to manufacturers instruction's, and note that the grout should be the consistency of a milkshake. Don't forget to let the grout slake, or stand, for at least 15 minutes prior to using.
Apply the grout start in one corner and work outward, using a laminated grout float. Scoop a small amount of grout, and holding the float at an angle (Image 2), push the grout into the joints with the flat edge and a sweeping motion.
Pushing the grout over the face of the tiles diagonally with the flat edge of float will cut off excess grout. Be sure to work in small manageable areas. Continue the process over the entire floor until all joints have been grouted, and be sure to make two or three passes from different directions, scraping the tile with the edge of the float to clean off any excess grout. Allow grout to set and haze (dry until partially opaque). With a nearly dry sponge, tool the grout (Image 3) to eliminate pinholes, voids, highs and low spots. Do a final wipe with a nearly dry sponge pulled diagonally over the face of the tile to remove any grout residue. Whenever sponging tile, don't use too much water because it will dilute the grout. Once the grout has hazed, polish the face of the tiles with cheesecloth. The mesh in the cheesecloth will give a nice buffed quality to the floor.
Don't grout the perimeter joint in the floor (Image 4). This open joint is covered by a wood base (baseboard) and allows the floor to expand and contract.