well I was installing glass tile on the walls around the bathroom a friend of mine who said he is Schluter certified, which I believe, was installing the mosaic tile sheets in the shower install. The shower stall is Kerdi board. All the seams have been properly taped off with Kerdi band and I used the Kerdi floor system which is tapered down to the drain. The problem is what he put the Mosaic sheets in he didn't leave any space between each sheet so where they meet he left no grout line whatsoever. There are approximately 9 Mosaic sheets in the shower floor. And it doesn't seem like I'm going to be able to get any grout in there. When I confronted him about it he said that if the tiles are that tightly against each other than water will not penetrate it. But I know all about water and it will go where it wants to go. He said also because the floor is tapered most of the water is just going to go to the drain. I'm not sure what the solution is at this point because I didn't notice it until two days after he set the floor. When I got down there I saw that he didn't use spacers and I'm aggravated. But he was doing the work for free so what am I supposed to do? The Kerdi drain is already set and everything is in thinset and cured. What is the solution? I don't want to ruin the Kerdi floor system underneath this mosaic. Any advice other than you get what you pay for it would be much appreciated at this point. And keep in mind the drain assembly is already secured in there.
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