Location of Caulk on Tub Flange
Per the photo below, where does the bead of caulk get applied? The red is the poly vapor barrier and the blue is the Durock concrete board. Per the Durock installation instructions, a small gap was left between it and the top of the tub flange. Does it go on the # 1 side between the poly and the Durock or on the # 2 side underneath the poly and lays on top of the flange? After the bead gets applied, I tile than put another bead along the bottom of the tile and tub. After reading other posts, I am to understand, water get behind the concrete board and needs to flow down the vapor barrier than into the tub again. How does this caulk affect the water from getting back into the tub? How long should I leave the poly hanging over? Now it is very long and needs to be trimmed back.