Nor will putting a rug over your floor.
Does your floor need to be able to breathe.
2 walls have to breathe.
I just wanted to add one more vinyl floor variant that you should consider for a basement installation if you are already considering a click lock floor.
Allow the subfloor to dry for at least 72 hours after you remove an old floor covering and before you bring the new flooring into the room.
You say so your self in your foil faced polyisocyanurate example.
Unless you re in a one way climate like minneapolis or miami putting plastic in your walls will trap moisture and grow things.
Most folks who say walls need to breath mean moisture needs to be able to dissipate sufficiently to avoid mold and rotting issues in the wall cavity.
If the subfloor is new it may need longer especially.
Most walls do need to breath from one side to allow any moisture from dew point condensate to dissipate.
This low level of air leakage allows the home they say to be properly heated and cooled and to provide.
A flooring professional should be able to help do the research.
There are those who claim that houses need to allow in a certain amount of fresh air even with the windows closed in order to function properly.
The other answers hit the nail on the head wood floors in basements or anywhere subject to moisture is generally a bad idea.
I highly recommend loose lay vinyl tile.
Houses don t need to breathe but they do need to be able to dry out when they get wet.
Choose products with little or no formaldehyde.