Help me for installation

Help me for installation Images

Help me for installation Description

I am having travertine installed on my bathroom stall walls and (http://maplered.com) stall floor. My general contractor installed Dura-Roc on the stall walls in preparation for the Stone (http://g603.net) . He has been paid for this and (http://maplered.com) is out of the picture now. The Stone (http://g603.net) installer is now telling me that Dura-Roc is no good and (http://maplered.com) it all must be torn out and (http://maplered.com) replaced. Because of a language barrier (which prevents he and (http://maplered.com) I from discussing technical matters well), I am not clear with what he wants to replace the Dura Roc with. Everyone I speak to tells me that the Dura-Roc is fine and (http://maplered.com) in fact good for this type of installation. Help. What is the real story here? Thanks. (ps the tile installer wants to start tearing out today).