Department of Energy Zip code insulation program
This program will tell you the most economic insulation level for your new or existing house.
Earth Craft VA
EarthCraft promotes diligent airsealing and energy efficiency. Airsealing of the building envelope and its mechanical systems, while still allowing for fresh air intake, provides a tighter building envelope at little additional cost. There is less communication of air and sound between units and better indoor air quality through the use of managed fresh-air intakes. Thus, projects are more energy efficient, less costly to occupy, and more durable overall.
ENERGY STAR is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy helping us all save money and protect the environment through energy efficient products and practices.
US Department of energy efffiency & renewable energy
Unless your home was specially constructed for energy efficiency, you can usually reduce your energy bills by adding more insulation. Many older homes have less insulation than homes built today, but adding insulation to a newer home may also pay for itself within a few years.