The tile in our master bathroom shower was completely falling apart and we were worried that the wall behind it was being damaged. I called About Grout tile specialists. The "grout expert" was sent to my house and although it cost an arm and a leg and my first-born child, the grout master did a high-quality job. It took longer than I thought (multiple visits to allow time for drying), but it was well worth it in the end. At the very least it saved us from having to do costly repairs on the wall behind the shower. If you are looking for a grout specialist in the Seattle area I recommend About Grout.