Using a grout float on uneven tiles is done using the same method as using one on regular tiles. The difference is that you may have to grout over the tiles a few times and get your hands dirty. What this means is that you may have to use your fingers to get in between some of the tiles. It takes a little while longer than grouting tiles that are even but the outcome is just as beautiful.
Step 1 – Apply Grout
Mix your grout as you normally would, following the manufacturer’s instructions. Place a good amount of the grout on the tile where you will start. Use your grout float to spread the grout in between all of the tiles in the area you are working in. This is where it may get a little messy for you. You will use your fingers to push the grout in between the tiles. This will help to pack it in tight where the grout float cannot reach.
Step 2 – Clean Off Excess Grout
Continue to apply the grout in the same manner as listed above until all tiles and the cracks between them have been thoroughly grouted. Let your grout dry as per package instructions. Then, use your squeegee, cloth, or sponge to clear and clean all the extra grout from the tiles.