This photo is of a house Schloegel Design Remodel recently remodeled. We converted the attic space on the left side into a bedroom with a full bathroom. Notice the snow on the roof that is still present. The right side of the roof, which covers finished space as well, is free of snow. This photo really shows the difference in insulation from when this house was built some 50+ years ago. We used a product called Icynene, www.icynene.com. The photo is pretty self-explanatory on how well this type of insulation works. A well-insulated house should keep snow on the roof, which is a great indicator that heat is not escaping from your living spaces.