Can anyone recommend an underlay for laminate wood flooring that provides the best thermal insulation? By best I mean one that helps to retain heat in the room as much as possible as our front room floor, the one that is due to be done, has freezing floors. Noise reduction is not so much an issue. I have had a look around but I'm a bit bewildered and notice that every brand claims there's is the best. I'm interested in real world experience from people who have used products as well as professionals' experience.