Tiling showers stall walls-Grout necessary if butted against each other?

Answer 1

yes, you still need to grout the lines. there are little tabs on the tiles that still make a tiny space between the tiles. you use the grout that looks like a cream, you don't use the sanded grout.

Answer 2

You use a silicone sealant, not a grout

Answer 3

Grout is always necessary.