How to keep from dropping grout all over when tiling

• Step 1: Remove existing fixtures (toilet, sink, etc.)
• Step 2: Remove existing tile.
• Step 3: Determine if existing sub floor is appropriate for tile.
• Step 3 a: Replace existing sub floor (if necessary).
• Step 3 b: Install appropriate sub floor.
• Step 4: Install new tile.
• Step 5: Reinstall fixtures.
• Step 6: Enjoy your new bathroom for years to come.

This may not be the answer you are looking for, but to do the job right (in my opinion) you should start fresh.

If you don't feel comfortable doing the job yourself, you might think about hiring a professional.

I apologizes for the bluntness of my answer; as a home owner myself who has had to fix the messes others have created, in my opinion there is no excuse for not doing a job properly and (as Mike Holmes would say) making it right.

Removing the existing tile will cost you nothing but time, and in the end it will make you feel much better knowing that you can enjoy the remodel for years to come trouble free.

If you really want to prevent any grout getting stuck in the dimples of the tile you need to mask it off. Yes- I know.. every single tile? Unfortunately, yes.

Style and beauty is hard work.

But you can use the wide masking tapes and then just try to grout as cleanly as possible. Do not smear the grout allover the tile. Keep to the area you want to grout. Possibly apply grout with a grouting tool then smooth it with a sponge; washing it regularly.

Once its all dr peel the masking tape away. Viola.