Delaware: Attic Insulation Payback by County

Delaware: 3 counties covered

Delaware spans DOE climate zone 4. Across its 3 counties tracked here, an uninsulated attic saves an estimated $1,363/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.

• New Castle County — zone 4, ~$1,440/yr
• Kent County — zone 4, ~$1,336/yr
• Sussex County — zone 4, ~$1,312/yr