How to Regrout Over Existing Grout
- 1). Load the drill with its grout-removal bit. Run the bit along all parts of the grout lines that are loose, cracked or otherwise in need of replacement. Work it in each direction to the point that it's back to solid grout lines all around.
- 2). Vacuum out the broken up grout and debris.
- 3). Sponge off the tiles to remove any dust.
- 4). Use a grout float to spread grout over each section of the tiles where you extracted it before. Scrape over the tile face with the long edge of the float while forcing it down into the spaces.
- 5). Allow the grout to sit for 10 minutes. Use the damp sponge to wipe up the residual grout from the surface, running the sponge flat over the surface so it will leave the grout in the lines and smooth it out.
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