Nancy Young wrote:
"John Gilmer" wrote

Yesterday, we pulled the 12" square tile squares off a bathroom
floor. We
have owned the place for almost 20 year but we don't know how much
longer than that the tile was in place.

Anyway, it seems that these is "paper" between the tiles and the
sub-floor.

Maybe they were peel and stick tiles.

No-peel and stick?