Repairing bathroom floor... again
It has been a year since another contractor repaired our new master bathroom tiling by tearing the floor out and starting again from the pan. We have a new mudpack, new sill, new tiling on the floor and up about a foot into the wall, and once again, we have wet grout which is now beginning to fall out on the floor. We've got 1"x3" tiles and 1/16" grout seams on the floor. Although the tiles feel pretty firmly in place, there is clearly unevenness in the mud pack (The high part near the shower head has a dip) and water definitely stays in the grout on the shower spout side of the rectangular space that is our shower stall.
The most recent contractor (number three) has suggested that we tear out the grout that is worst and regrout it, then seal the entire shower stall. Any ideas on other trouble-shooting that should be done while he is here, and any suggestions for why we are going through this (AGAIN for the second time!)? Is there any possibility that my unsanded grout is bad or has been applied improperly? Could I test this in some way?
Thanks to you for the good suggestions -- every time!