Regrouting bathroom tiles at home

Cheers Franklin.
I still need to polish the tiles to get some of the grouting haze off them. I'm stoked with the result now.

The only trouble is that now the wall tiles which haven't been re-grouted, look positively dirty compared to these.

It's a huge improvement Blinky! Nice job mate. It's really picked up the appearance of the tiles. I wouldn't pick it up as being the same floor.

Ok I've uploaded an "after " photo. I ended up cleaning up the tiles and removing all excess old grout. Then I used Bostik Instant-Pro premixed grout and did it myself.
I amazed at the difference..it's like having a new shower floor!
Took a while to do because I hadn't done it before. Some of my grout lines are a little wonky but what the heck..

Think I might take up professional tiling :)

I've done some small areas of grouting and it's not too big a drama.

You tiles look like they probably use "sanded" grout. There are two types sanded and unsanded.

Get rid of all the loose grout then use a cleaning product that is recommended for this job.

You can use a spatula or sponge to apply the grout once it is mixed up. You'll want the consistency of toothpaste...perhaps a bit firmer.

Use your finger to run down each tile line to get a smooth fill in. Once you have done this, use a damp cloth or sponge to clean up excess grout on the tiles .

You will need to apply a sealer after the grout is fully dry.
Make sure you follow the drying time instructions with your grout and sealer steps.

Those are some sad looking tiles!

I'd suggest pulling them up and re-laying them, probably use a professional.

If you were going to do them yourself though you'd want to clear out as much of that mold and loose grout as possible. Get some of that bleach gel and try laying it down in the grout and leaving it for a while before scrubbing it and rinsing.

You'll have to leave the tiles a while to dry before regrouting them. You can buy tubes of grout at any d.i.y store.