Attic
Yes, you can do as you suggest. The key is to make sure the attic is insulated to the proper R factor (I believe it has been increased to R-50) ... check with your local building inspector. This might creat a problem because R 50 is a lot of insulation. The attic floor should be above the insulation for the insulation to do it's work. Also, ensure the venting is adequate, both at the soffit level and your roof vents. An inproper balance can create issues.
Yes, you can do as you suggest. The key is to make sure the attic is insulated to the proper R factor (I believe it has been increased to R-50) ... check with your local building inspector. This might creat a problem because R 50 is a lot of insulation. The attic floor should be above the insulation for the insulation to do it's work. Also, ensure the venting is adequate, both at the soffit level and your roof vents. An inproper balance can create issues.