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What should be the space between the wall and floor tile in a shower? No space? 1/8" space?
You use the same spacing as you do between the tiles, but you use a special caulk on this seam. The caulk is flexible and resembles grout. If you grout this seam, the wall tiles will crack. This caulk is also used on all wall corner seams for the same reason.
The same spacing as you do between the tiles.