Mix the dry grout powder and water in a clean bucket. Make enough but not too much as the grout will start setting up.
Stir well with a trowel to remove lumps. It should be the consistency of chocolate pudding, but not at all runny.
It needs to be able to hold its shape. You could buy grout premixed instead and not worry about this step.
Remove any spacers you had placed between the tiles and clean away any remaining thin set. If any of the thin set has squeezed up between the tiles, scrape it out with a painters' five-in-one to allow space for the grout.
Be careful not to scrape or chip the tile. If you have many scrapings, use a vacuum cleaner hose attachment to remove all the grit.
Push the grout into the space between the tiles, pushing it in well with your grout float, making sure there are no air pockets. Apply it to every side of the tile.
Remove any excess with your grout float. Work the grout into a section about 4-feet by 4-feet of tile, unless you have experience and are a fast worker.
Squeeze excess water out of your sponge and wipe off any grout that is higher than the grout space between your tiles. Rinse your sponge often and keep it damp, but not wet.
The point is not to wash off the grout you just applied, just to clean off the excess.
Apply the grout to the next section, while allowing the previous section to dry and set up. Grout and clean as before.
Allow the whole job to set up overnight. Finish the job by wiping down the tiles with a micro fiber cloth to remove any grout film.
Things You Will Need
- Grout float
- Painters' five-in-one
- Apply grout sealer before using the tile.