How to replace kitchen floor?

you may need to replace the sub floor. water seeped through the segments and loosened the glue. or the wood rotted.

Try a hair dryer to soften the glue then pull up the ones you need to replace. If the hair dryer doesn’t work buy a ‘heat gun’. These are sold in the tool section of home improvement centers, or online.

I did that. When I put down the floor, I purchased an extra box of tile, in case of damage to a tile. I did lift the old ones and replace them. However, since the background it white, they did not match. I have tried everything to restore them to the original white. My question was, how do I replace the flooring without tearing up the "old tile." I know how to do that, since that is what I did, before laying the current tile.

If the corners being rolled up are the only issue, you can use an industrial blower with heat to uncurl those.

Many think this is a blow dryer, but it really ain't. Looks same, they might think it is while watching a contractor, but the heat output is alot hotter much more swiftly.

Usually you can rent those at any tool depot.

If you want, you can try heating up a blow dryer for a while, but really the energy you will use getting it to the ° F you need to decurl tile, to then end up not liking the results, is in my opinion not worthwhile your time, effort, expense, etc. In contrast to: just rent the tool and do it right while wearing an ove' glove.

Otherwise you can

A. Peel those off and try to find an exact match

B. Peel off all the bordering tiles and the midsection to replace those with a tile more suitable for borders and contrasting your preexistent tile with Tile #2

C. Do B and while you're at it, place a matching carpet in the regions you do not want to improve with a contrasting midsection, to install a contrasting carpet instead.

D. Cut off the curled edges at the entire border or pull these up if you can, to pkace a border with Carpet Tile.

You do have options.

Be safe.

Enjoy your improvement.