How to Regrout Tile in a Bathroom

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When your grout gets old it can start to look pretty shabby. Mildew build-up isn’t the worst of it, crumbly grout can lead to water getting under your tiles and causing all sorts of problems. But not to worry, regrouting is a simple task. Read on to find out how to bring your tile grout back to life.  

 Remove the old grout

The first step is to chisel away the old grout to make room for the new. If you try to regrout over the old, it may not hold very well and you could be applying it over mould that will continue to grow unseen. You don’t have to remove all of the old grout, just enough to create space for the new grout to fill; about half a centimetre should be enough.   

If you don’t want to spend a whole afternoon chiselling away at grout, you can use a power grinder. This will make the job much faster, and you can even get a grout removal attachment with plastic guides that will remove grout quickly while preventing you from scratching the bathroom tile.  

Use safety goggles and a dust mask when removing old grout as it creates a lot of dust.  

 Prepare to regrout

Before you start applying the new grout it’s a good idea to apply a sealant to the tiles. This will prevent any of the grout getting trapped in any porous surfaces on the tiles. Leave the tiles to dry for 24 hours before you regrout. 

When you’re ready, mix the grout in a bucket with a drill and paddle attachment to make it easier. You may be better off mixing only a few cups of grout at a time to make it easier to work with.  

Apply the grout

Use a rubber grout float to apply generous amounts of grout to the tile seams. Make sure the spaces between the tiles are filled completely. Don’t worry about excess grout getting on the tiles, you can remove that later.  

Once all the seams are filled with grout, you can start removing any excess by using the grout float at a sharp angle and scooping or ploughing it away from the tiles. Move the float diagonally across each tile to avoid detaching any of the grout in the seams. You won’t be able to remove all of the excess grout but get what you can.  

Clean up

Let the grout sit for about 15 minutes and then use a bucket of water and a sponge or cloth to clean the tiles. It should be fairly easy to remove the excess residue from the surface of the tiles. Once this is done, let the grout cure for 24 to 48 hours before applying a grout sealer. Try to avoid walking on it if you can.  

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Finishing it off

The final step is to apply caulking. Use a colour that matches your grout and fill up all the seams. You can just use your finger to smooth it out and make it concave. Once all the caulking is done, apply a final coat of grout sealer. Wipe off any excess from the tiles so it doesn’t stain. That’s it, you’re done. You now have freshly laid grout that will make your bathroom look fantastic.

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