I live in Olympia, WA (zone 8), so our winters rarely get below 20 deg F. My house was built in 1980. It is two stories with a crawl space underneath. About three years ago I had the original ratty old carpeting removed and replaced with laminate wood flooring. Now the first story floors are quite cold, especially in the winter. I had someone come out to assess the crawl space, thinking I needed more insulation under the floor. The contractor thought the insulation was adequate and to code. (Imagine the honesty of the man, he could easily have charged me a bundle to rip out what I had and replace it!)
I don't want to cover my new flooring with new carpet, but I want warmer feet. I watch Mike Holmes' show on HGTV, and he often uses a combination of spray insulation plus batting when insulating between the garage ceiling and the second floor. He's in Toronto where it gets a lot colder than it does here. Anyone got any ideas?