suellen
New Member
We had a new acrylic tub installed which has a flange that attaches to the studs. The tub installation instructions said to install the cement backerboard with a 1/2-inch gap between the tub flange lip to prevent wicking, with the tile then installed extending down over the flange. I've just finished installing the backerboard. However now that it is time to tile, this seems to create difficuties. I have a 1 & 3/4 inch gap from where the backerboard ends to the top of the tub lip (one half inch gap open as per directions plus height of flange). I can see how the tile will adhere to the backerboard, and I can caulk a 1/4 inch section were the tile meets the tub. However, how do I grout the vertical seams between the tiles? It is cavernous behind the bottom row of tiles....Also, this seems to potentially expose my studs to more moisture than if I had brought the backerboard down to or over the flange...