@tjbnwi I tried to look at the pics but could not zoom in enough to see....How did you do the ledges in the niche? Kerdi board again with some framing for support?
@Alan G Hopefully these two will expand. I had my export setting at medium instead of large.
The niches are in a plumbing wall, it is a double 2x4 deep wall (7.5" without faces). A vent runs through the channel created by the lower of the dividers.
I used Kerdi Fix to adhere Kerdi backers to the edges of the studs (3.5" back from the face of the show wall). Kerdi board was then glued to the backers at full stud bay width and taller than what was needed for the niche height Strips of Kerdi board were glued to the edges of the studs, Kerdi board supports were glued on to the stud Kerdi board and back Kerdi board, tops and bottoms cut to fit, Kerdi Fixed to the supports, face sheet supports front edge.
There is a slight drainage pitch on the bottom pieces.
The white goo in the pictures is Kerdi Fix, do not get it where you don't want it, it does not come off without a lot of work and chemicals...
If this was not a plumbing wall, I cut the back and glue it right to the back side of the drywall on the opposite side of the work being done.
I built the boxes faster than I typed this.....
I finished the tile in the niche today, there are 48 tile pieces in it...not counting the glass mosaic that covers the channel faces...
Tom