Now that summer is over, it is time to add extra insulation to save money this winter on energy costs. Take a yardstick up in the attic and meassure the depth of the insulation there. If it is 6 inches or less, you will benefit greatly by adding more attic insulation. Six inche will give you an R value of 19 while 12 inches will boost it up to R38. This will keep your furnace running less and more money in your wallet.