i installed durarock for a new shower wall, think i was tired by the time i got to the last piece. there is a difference of about 3/8" between 2 sheets. i tried to feather it out with thinset when i taped all the seams, but i don't know if it will work long term. how much thinset can you use to even out seams between 2 sheets of backerboard? wife spent a TON of money on the tile so i only want to do it once. can i continue to build up and feather the edges out with thinset, should i try to stucco it, or should i rip it out and redo it?

shudama

time to take it out and start over, hopefully you used screws. use shims behind the cement board and screws every 8 " or so in spacing.

I have been in the business over 20 yrs and have seen some really bad "patchs with cement behind tile" work.. the most i have ever been able to cover is < 1/4 inch and still have a nice flat surface for tile. of course with patience and practice you can build up the cement to a very nice smooth FLAT surface, but not everybody has that much time or patience.

BigRed1500

bummer. so if i was to try and build it up and smooth it out, i should use cement rather than the thinset, though correct?

BigRed1500

well, i ripped the bad sheets of cement board out. while i had it opened up, i decided i didn't like the way i framed it, so i completely reframed that wall. tiled that wall last week and came out beautiful. thanks for the push in the right direction.