I'm looking for suggestions on how to insulate my flooring before we put carpet down. Our house is 50 years old and the room is what is condidered a "breezeway"; between the house and the garage. The current floor is decorative concrete and is very cold in the winter time. Our ceiling height is only 7', and the existing back door swings approx. 1.5" above the current floor. I'm afraid that carpet and it's backing will still allow that creeping cold to come off the floor!