Lippage, trippage... what are the fixes?
I did a test walk on our newly laid floor, and noticed several corners with noticeable differences in tile height. Ouch potential! These are rectified porcelain 12x12 tiles, with a grout line of just a hair over 1/8". Tiles are flat and true. The contractor put in new subfloor, then the floor heat coils, then whatever gray goo sits on top of that. He used modified thinset from a big brown bag to set the tiles. The floor was grouted Thursday. I was assuming it would be essentially perfect since they were working with a new, level floor.
I need to figure out what to tell the contractor. I want to be fair but I have to live with this for 20 years or so! I did Bill V's credit card test to identify all the spots where the card would crash into a higher tile, and it's probably 15 tiles in a 35 square foot area. About half of those areas look like the difference is about 1/16", maybe more. The others are more subtle, but still stop the credit card abruptly. Does this seem like a problem to you experts?
Are there ways to fix this that don't involve ripping out the tiles - like sanding down the corners and sealing them, or adding more grout so it buffers the sharp edges better? If the tiles were just set 5-6 days prior, is pulling them less horendous than I'm imagining? Will the heat coils need to also come up? I'm assuming there's no way those tiles could be re-used, right?
Thanks in advance for advice!