How to Insulate Your Attic and Save Money Year-round

Adding attic insulation is one of the easiest ways to reduce your energy bills. Here’s how to know whether you need more.

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To find out how much insulation your home needs, first find your region on the map and note the Zone number. Then check the chart in the article to see the recommended R-value of insulation for your attic. Also check the next image in this Image Gallery — it lists the recommended R-values for walls, crawl spaces, basements and more.
U.S. DEPARTMENT OF ENERGY