Large Tiles Are Not Flat
We're not gonna be able to give you definite answers, but. All installations will have some lippage. All tiles have a degree of warpage, the larger they are the more of course. Large tiles set in a subway 50% offset pattern will have more lippage than when set with no offset. That is why it is recommended that the offset be reduced to 33%.
If the subfloor isn't close to perfect to begin with it's gonna get worse once the tiles are set, tiles don't bend much. There's many factors including the type of installation method you paid for, the quality of the tiles and skill of the tile setter.
Tile 4 You LLC Troy, MI
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