Schluter Kerdi shower system...help!
So I am in the middle of a complete gut and renovation of my bathroom. I am doing a custom shower and my contractor put in the Kerdi membrane yesterday. Admittedly, it was his first time using the product. He and I both watched the instruction dvd and read the manual. We installed it over hardibacker concrete board.
The instructions said repeatedly (and their phone tech told me) to use unmodified thinset to apply it (there was a whole section devoted to it), which is what we did. We used latircete megabond thinset without the latex additive, we just used water. The mortar seems to crumble when scratching it with a putty knife (or your nails for that matter). The kerdi paper peels off pretty easily and when you look at the back of the paper, the mortar doesn't appear to have adhered to it at all.
I think we followed the directions exactly. I plan to call both schluter and laticrete tomorrow to find out what went wrong. Needless to say, I am furious and frustrated. The whole schluter system cost me almost $700.
Any advice? Thanks.
Last edited by secutanudu; 05-05-2010 at 09:36 PM.