By: NPPD Energy Efficiency Program Manager Cory Fuehrer Everyone’s looking for a good deal. There’s no exception when it comes to home improvements, especially if you own an older home. If you find yourself in that category and are planning a major renovation, consider that adding insulation during your project often pays for the additional cost with energy savings in two to five years. According to Energy Star®, homeowners can save an average of 15% on heating and cooling costs by adding insulation in attics, floors over crawl spaces, and accessible basement rim joists. Adding insulation can also increase the value of your home. Remodeler Magazine’s “Cost vs. Value Report,” which breaks down both the cost and return on investment of many home improvement options, noted that adding fiberglass attic insulation increased home value by an average of 17%. Considering the North American Insulation Manufacturers Association estimates that almost 90% of existing U.S. homes are under-insulated, familiarizing yourself with the following most-common types might be a good place to start. Blanket Insulation While most commonly sold in rolls or batts of spun fiberglass filaments, blanket insulation is also produced from cotton, cellulose and mineral wool. They’re made in various thicknesses, but usually in the standard widths of 15 and 23 inches so they easily fill the cavities between joists or studs. Blanket insulation is also ideal for unfinished attics. Not only is it easy to cut and install, but more than one layer can be installed to achieve the desired level of insulation. Loose-Fill and Blown-In Insulation Since attics often have limited headroom and numerous obstructions, loosefill insulation is a popular choice. It can easily be blown on top of existing insulation and other obstructions like ducting, can light fixtures and cross beams. Rock wool, cellulose and fiberglass are the most common materials used to make loose-fill insulation. Foam Board or Rigid Foam Foam board is a rigid panel made from polystyrene or polyisocyanurate. It provides a high level of thermal resistance (R-value) per inch when compared to other types of insulation. It can easily be installed in a variety of applications, including walls, roofs and floors. Because it provides a vapor barrier when properly sealed, it can help control moisture, reduce air leaks and keep pests from invading your home. Because of its rigidity, it's self-supporting, doesn't sag and provides continuous insulation, which effectively blocks heat transfer better than batts. Spray Foam and Foamed-In-Place Insulation Similar to foam board, spray foam insulation and foamed-in-place insulation is a liquid polyurethane plastic that is sprayed directly on the area being insulated. As the liquid is sprayed, it expands and hardens to create a dense foam that seals gaps and forms an air-tight vapor barrier. This significantly improves energy efficiency since it significantly reduces heat transfer while stopping air leaks in walls, attics and crawlspaces at the same time. There are two main types of spray foam insulation: open-cell, which is less dense and good for soundproofing; and closed cell, which is denser, offers higher R-values, adds structural strength and resists moisture. Adding insulation can be one of the most cost-effective projects you can do to make your home energy efficient. If you primarily use electricity to heat your home and there are six inches or less of insulation in your attic, your local public power provider may have an EnergyWiseSM incentive available once installation is complete. Contact your local utility or visit www.energywisenebraska.com for additional details. Your local utility, in partnership with Nebraska Public Power District, wants to help you get the most value from the energy needed to keep your home comfortably warm.