Alaska: Attic Insulation Payback by County

Alaska: 28 counties covered

Alaska spans DOE climate zones 7, 8. Across its 28 counties tracked here, an uninsulated attic saves an estimated $2,854/year on average once topped up to the recommended R-value — actual savings depend on each county's own heating and cooling degree days, shown below.

• North Slope Borough — zone 8, ~$5,016/yr
• Northwest Arctic Borough — zone 8, ~$3,987/yr
• Southeast Fairbanks Census Area — zone 8, ~$3,930/yr
• Yukon-Koyukuk Census Area — zone 8, ~$3,857/yr
• Fairbanks North Star Borough — zone 8, ~$3,716/yr
• Nome Census Area — zone 8, ~$3,606/yr
• Denali Borough — zone 7, ~$3,527/yr
• Bethel Census Area — zone 8, ~$3,271/yr
• Kusilvak Census Area — zone 8, ~$3,271/yr
• Lake and Peninsula Borough — zone 7, ~$2,905/yr
• Anchorage Municipality — zone 7, ~$2,879/yr
• Matanuska-Susitna Borough — zone 7, ~$2,835/yr
• Bristol Bay Borough — zone 7, ~$2,777/yr
• Dillingham Census Area — zone 8, ~$2,777/yr
• Aleutians West Census Area — zone 7, ~$2,755/yr
• Aleutians East Borough — zone 7, ~$2,504/yr
• Juneau City and Borough — zone 7, ~$2,496/yr
• Kenai Peninsula Borough — zone 7, ~$2,495/yr
• Yakutat City and Borough — zone 7, ~$2,432/yr
• Hoonah-Angoon Census Area — zone 7, ~$2,350/yr
• Haines Borough — zone 7, ~$2,249/yr
• Kodiak Island Borough — zone 7, ~$2,225/yr
• Skagway Municipality — zone 7, ~$2,171/yr
• Petersburg Borough — zone 7, ~$2,144/yr
• Sitka City and Borough — zone 7, ~$2,109/yr
• Wrangell City and Borough — zone 7, ~$1,957/yr
• Prince of Wales-Hyder Census Area — zone 7, ~$1,930/yr
• Ketchikan Gateway Borough — zone 7, ~$1,737/yr