District of Columbia: Attic Insulation Payback by County

District of Columbia: 1 county covered

District of Columbia spans DOE climate zone 4. Across its 1 counties tracked here, an uninsulated attic saves an estimated $1,347/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.

• District of Columbia — zone 4, ~$1,347/yr