Q. Where should bathroom corner shelf be placed?

The greatest corner shower shelf in my view is the one that's built into the wall before the tiles go up. Thin set mortar and the tile below provide support for these shelves when they are attached to the shower wall. This setup is both straightforward and highly secure. Place the corner shelf in the shower at the proper height and make a mark on the wall of the shower directly above it. To use it as a soap dish turn it so that the water channels are facing up; to use it as a foot shelf turn it so that the smooth side is facing up.