Could these tiles be used in a basement workout room with an occasional moisture problem on the floor? We previously had puzzle mat there and any small amount of water would wick under the tiles and because there was no air space would remain for a long time.

Our Slate Flex Tiles can be used as a workout floor in your basement with an occasional moisture problem. Since these tiles are non-porous like your foam tiles, you may still have the issue with there being moisture under the tiles. If the moisture if coming up from your subfloor, we would recommend sealing the subfloor to mitigate the moisture issue.