Duct insulation can be performed in different ways. Sometimes a foil-faced blanket is wrapped around the duct. In other cases, a duct run can be insulated with spray foam. A third option (with attic ductwork) is to add enough extra attic insulation so that the ducts are completely covered with the new insulation. If you have ductwork in your attic, basement, or crawl space, you do need duct insulation. The attic, crawl space, and an unfinished basement are all unconditioned spaces - meaning you don't pay to heat and cool them. If you have ductwork in one of these areas, the duct temperature will be the same as the temperature of the space, therefore your heating system has to change the temperature of the ductwork before it can actually heat or cool your living space. Find out today if your ductwork is properly insulated by contacting your local Dr. Energy Saver dealer.