According to MLD :
The moisture (vapor) comes through the cement floor on a continuous basis.
Ceramic tile, carpet & pad etc. don't present a problem, apparently the
vapor just makes its way through.

Not necessarily. The vapor _may_ pop ceramic or vinyl right off the floor,
cause mould in carpet/pad, cause hardwood to buckle.

Take a 2' square of heavy plastic (like dropcloth). Tape it down over
the concrete and seal down all the edges.

Let it sit for several days (preferably in the spring). If you have
condensation under the plastic, you will need to address the moisture
problem.

This is one way to tell when a new floor treatment is okay to cover over.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.