Yukon-Koyukuk Census Area, AK Insulation Payback
Yukon-Koyukuk Census Area attic insulation, by the numbers
Yukon-Koyukuk Census Area, Alaska is zone 8 under DOE's climate map (Subarctic), which means winters severe enough to sit in DOE's most extreme US climate category. An uninsulated attic there should be built up to R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $3,857 a year in heating and cooling — a payback around 0.9 years. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $3,852 a year on the heating side, $4 on cooling. By estimated insulation savings, Yukon-Koyukuk Census Area lands in the 100th percentile nationally. Zone 8 alone covers 9 counties in this dataset, and Yukon-Koyukuk Census Area comes in 4th by savings. Alaska averages $2,854/year across the counties tracked here; Yukon-Koyukuk Census Area comes in 35% higher.
Where these numbers come from
Yukon-Koyukuk Census Area's climate figures — 14,408 heating and 27 cooling degree days a year — are read from TANANA CALHOUN MEM AP, AK US, 20.7 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Yukon-Koyukuk Census Area in the 100th percentile of this 3,162-county dataset.
The smaller top-up scenario
If Yukon-Koyukuk Census Area's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $563/year — payback about 4.1 years. Worth doing on the numbers alone.
Next steps for a Yukon-Koyukuk Census Area attic
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Yukon-Koyukuk Census Area job, not a quote. Expect at least a $600 minimum charge from most contractors.
Where these figures come from
Yukon-Koyukuk Census Area's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.