Designing Kitchens and Bathrooms - How to Grout Shower Tile without a wall behnd it?

Hey everybody, we just bought an house that is over 30 years old and the tiled shower stall needs some work.

While taking stock of what needed be done I came across some tile that came together to form an angle near the shower door. The grout line at the angle has no grout at all - and there is about a 1/4" gap from the face of the tile to the wall behind the tile. The tiles in question are solid and the grout lines on their other 3 sides are good and solid so it seems just the one edge of these tiles hang out past the wall where it forms the angle.

The gaps between these tiles are very small so there is very little room to work.

Any ideas on how to fill the gap behind the tile to form a solid foundation for new grout?

I had a similar situation. Where tiles meet at angle should be caulked - not grouted due to substrate expansion/contraction. What I did was just find some caulk that closely matches the color grout you have and seal up the crack. Chances are if you use grout it will crack again anyway.

Rgds
Gene

This is correct, corners are caulked. Normally this is the last thing that the tile men will do. They may have just overlooked it, no excuse of course but is probably what happened.