I have been installing tile now for a little time now. and i have a question about backer board in shower and tub areas.
In a tub area or shower pan area do you place the backerboard about a 1/4 off the flange lip or over the lip?
I have been siliconing all my seams. If i run the backer about a 1/4 above the lip what do i do with that void between the tile and lip, because sometimes you may have a 1/4 differnce from the back side of the tile and backer?