Lets Play Two wrote:
Based on what you're saying, maybe the non-stick tiles are the way to
go as her floor underneath seems "bumpy" and I guess I could use an
electric sander to smooth it out but I would not be sanding wood,
rather it would be the dried up glue/adhesive (it's black and ridgedy
and bumpy as I looked uunder one of her tiles that is coming loose.
I'm not sure the easiest way to smooth out that surface.

The subfloor must be absolutely smooth. The smallest imperfection will
migrate through any tile (except, obviously, ceramic) and mirror itself on
the new surface. You MUST fill-in all depressions (even those as small as a
pencil lead) and scrape off or sand down and bumps.

Ignore the advice about asbestos. It's just "stuff." No one has ever been
harmed by a commercial product containing asbestos.

If you DO have asbestos - and have trouble getting rid of it - one view is
to leave it in a schoolyard at night. Since the government made it so hard
to deal with the material, let them take care of it.