Cement board meets drywall?
First, a little backstory: I have had to rip out the tub surround twice now. The first because we noticed a little mold, and after investigating it revealed that the caulking kept pulling away between the tub and the surround, and the drywall was black as night with mold. So we contacted the contractor who installed the tub/surround a few months earlier and he basiclly flat out refused to do anything about it. After settling with his insurance, we replaced the drywall and installed a new surround. After the caulking cured for several days, it pulled away between the tub and surround almost imediatly. We hired someone to come in and find the problem and they told us that the floor was unlevel, and the contractor had leveled the tub (which is good) but failed to support the underside, so everytime my fat arse stepped in it the whole thing flexed enough to pull the caulking away.
This weekend I am going to tackle this project. I have the drywall cut out basiclly the shape of the tub surround, but an inch or so short so the surround goes up and over the seam.
I want to put in cement board instead of drywall for the water restistance factor, and down the road we sould like to do tile.
Do I need to mud/morter the seams of cement board to cement board? what about the seams where the cement board meets the drywall? Tape? what material do I use?
I DON'T OWN MY HOUSE...
MY HOUSE OWNS ME!