tub/shower corner shelves
#1

HELP!
Thanks to all your advice we have started tiling our tub/shower surround. So far so good EXCEPT we went to mark the lines for the corner shelves and the corners are not square, probably a little bigger than 90 degrees, so we can't get both sides flush up to the backerboard. Anything we can do to fix this such as building up the thinset a little bit? Urgent replies needed, we are on a roll.
Thanks!
Thanks to all your advice we have started tiling our tub/shower surround. So far so good EXCEPT we went to mark the lines for the corner shelves and the corners are not square, probably a little bigger than 90 degrees, so we can't get both sides flush up to the backerboard. Anything we can do to fix this such as building up the thinset a little bit? Urgent replies needed, we are on a roll.
Thanks!