Leaking tiled shower seat
A month ago, there was a leak from my second floor tiled shower into the first floor dining room. I had a tile guy come out. He thought it was the tile on the shower seat causing this. He replaced the tile. However, now it is no longer leaking into the first floor ceiling, but the water leaks down below the seat(I cut a hole in the wall behind the shower to look under the seat). When the shower is on and pointed towards the seat, water slowly leaks through the grout line where the vertical tiled portion of the seat meets the tiled shower floor.
I don't see any cracks in the new grout he put in, but the grout is very soft and can scratched away easily. Is this something that I can remove the grout and regrout it or can I try putting silicone grout over the existing grout.
Thanks.