We had this issue 7 years ago, the vinyl was lifting in an are about the size of a silver dollar in multiple locations. Turns out it was the quality, moisture content of the stone used in the cement. The stone was too dry, collects moisture, and breaks open, expanding, and raising the vinyl. If this sounds like your problem you need to open up the vinyl, remove the stone, fill the hole, then glue the vinyl down. We contacted warranty and expected it would be covered which it was but when the problem continued over time and we had not contacted the warranty insurance company within the one year we lost our litigation case. So we had to repair any latter popups ourselves.
|