That's the reason for Bill's question. Somewhat simplified: If the tile had a cream-colored interior and it was covered with a black glaze, grinding it down might not be the best thing to do as it would expose the light interior of the tile against the black glaze. With natural stone tile, or with through-body ceramic/porcelain tiles, where the tile is essentially the same color throughout, then you could possibly grind the lippage down a bit. Exposing the interior will not create a big color clash with the glaze, since they are essentially the same color. Mongo

Yes, it will. But be prepared for a stiff installation price, because the installer's going to have to either make absolutely certain the floor is dead flat after burying the wires, or he's going to have to spend alot of time with the tile keeping it flat afterward. This would not be a job for just any installer. Rectified porcelain gets set like stone, and between that and the square edges, it's extremely unforgiving. Walking in bare feet, you can feel as little as 1/64" in height difference from one tile to the next. Problem is you can see it, too. This is something you want to make sure you have someone who really knows what he's doing. Here's a couple of pics of a rectified porcelain front entry:

if the installer looselayed and nailed the cement board without a thinset base under it, your entire tile installation is incorrect and compromised because he did not give the backerboard a solid base to begin with by electing to looselay it, which is the incorrect method of installing cement backer board. the correct method(s) of installing cement backer board is in a minimum troweled 1/4" bed of thinset mortar UNDER THE BOARDS and nailed or screwed every 6"-8" and within 1-1/2" from all seams, and some manufacturers allow a bed of high strength construction adhesive UNDER THE BOARDS with the same anchors and naiing pattern, so check with the manufactrer for specifics). This gives the tile system a solid foundation to prevent movement and to flatten or level any minor subfloor inconsistencies that may cause movement in the system that can crack or debond tile and/or grout joints. Loose laying and screwing is insufficient and does not provide that solid foundation so it would be prone to movement that can cause cracks, tile pops, debonding, and/or cracking grout joints. The tiles and cement board needs to be gutted down to the bare subfloor, and the cement board anchored properly, or you may have more problems even worse than what you have now. Basically everything needs to be gutted and reinstalled properly or new product purchased and installed properly if they can not be gutted intact and usable. If that isnt feasible for you or your workers, then any repairs may be a waste of time, quite temporary, and plan on revisiting this issue time and time again over the years. Here is some information on CORRECT installation of cement backerboard systems: How to install Cement Backer Board In my opinion, your should demand the contractor with 30+ years experience gut all his tile and backerbaord work, install new the backerboard properly, then the rest of the tile work, PLUS foot the bill for anything that is damaged or uninstallable because of damage during the removal process ... because he did a crappy job and must guarantee his shoddy workmanship. If he refuses, you may have civil recourse becasue his work is improper. as to removing everything unhamed ... good luck ... i dont think its possible because everything is attached and locked in with thinset. If you must try delicate intact removale, jsutt go slow and pry lightly with just enough force to bring it up, but again, its improbable becasue you are talking cured thinset, so i doubt the matting will survive.

I have both...crocs and (two) Gel mats. I need both! I've had my Gel Mats for 2 years. One is fine. The other is curling at one of the long edges and on one of the short edges, it looks like the seam is starting to come apart. I do use the steam mop on them but if that's the problem, and I really don't think it is, why isn't the other one curling? They've been a lifesaver for me :) Monica