Flooring on cement for warmth

[Karen Sanders]

I am putting together the final budget on my first purchase. This is two houses on one property and the house I am looking for help with is the one I will live in, not the rental.

The garage was converted years ago into the garage but the cement was just covered with glued on indoor/outdoor carpet. I am going to make it a bedroom/craft room. I plan on putting plywood floors where I have the plywood cut in 4-8 in. strips then staining them to bring out the grain and then cover with with poly? What do you suggest I put between the plywood and the cement to help keep the floors from transmitting the cold like the carpeting did. I

The house is located on the Oregon Coast so it is very rare that the temp gets below 32. The house was built pre-1953 and is rock solid.