I have a tile floor laid a few days ago. They are self-adhesive vinyl
You can easily tell the hollow points from the solid points by tapping with
your finger and you can also see large sections of tiles flexing in
response to pressure. All of the tiles are at least 75% detached from the
concrete some are 90-100%.
I expect every square inch to be firmly attached to the cement, but the
office personel say "they need time to settle". My understanding is the
curing time is 5 days and if they cure while not in contact with the cement
that there's no hope.
I suspect that the tile was laid on a dirty floor, or the installer simply
didn't press them onto the cement. Is there anything else that could cause
this?, or maybe I just have unreasonable expectations.