Homeowners often overlook one of the easiest and most cost-effective ways they can cut down on energy bills: adding attic insulation. Tankless water heaters and solar systems may be sexier upgrades, but most attics are woefully under-insulated (especially in older homes). Adding insulation to an attic can immediately lower home heating and cooling bills and is a relatively inexpensive upgrade that can pay for itself in as little as 6-9 months. While looking to cut down on the energy bills don't overlook windows either. Blown attic insulation Blown attic insulation is...