Confused about R-values, rolled or blown-in insulation, vapor barriers and other insulation terms? This series of stories, adapted from U.S. Department of Energy insulation fact sheets, explains the ins and outs of home insulation -- and may help you save significantly on your heating and cooling costs.

• Insulation: The Facts
  Part 1: Why -- and what -- you should insulate


• Insulation: The Facts
  Part 2: Does your home need more insulation?


• Insulation: The Facts
  Part 3: Determining the R-Value You Need for an Existing House


• Insulation: The Facts
  Part 4: Air leaks and moisture reduce insulation's effectiveness


• Insulation: The Facts
  Part 5: What kind of insulation should you buy?


• Insulation: The Facts
  Part 6: Can you do insulation yourself?


• Insulation: The Facts
  Part 7: Doing your own insulation: Where to begin


• Insulation: The Facts
  Part 8: If you have insulation done by a professional


• Insulation: The Facts
  Part 9: Taking it further

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