On Sun, 08 Feb 2015 10:32:29 -0500, dadiOH wrote:

See my first response. The floor isn't "moist" but it IS concrete.
Which means that some dampness will penetrate it from the ground upon
which it sits.

I put some heavy plastic drop cloth on the floor, sized a couple of
inches larger than the cabinets. Put the cabinets in place and stapled
the overhang of the drop cloth to the edge of the 2x4s.