Adams County, ID Insulation Payback
Adams County attic insulation, by the numbers
Adams County sits in IECC climate zone 6 (Cold) — cold enough that heating, not cooling, is what decides the bill. For a currently uninsulated attic, DOE and Energy Star recommend building 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 $1,843 a year in heating and cooling — a payback around 1.9 years.
Topping up the attic pays for itself fast here.
Heating vs. cooling in Adams County
Split it out and it's roughly $1,726 a year on the heating side, $117 on cooling. By estimated insulation savings, Adams County lands in the 75th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Adams County comes in 450th by savings. Idaho averages $1,995/year across the counties tracked here; Adams County comes in 8% lower.
Adams County's actual weather, not a national average
NOAA's Council, ID US station, 9.3 miles from Adams County, supplies the 6,454 HDD and 729 CDD this estimate runs on. That combined heating-and-cooling load ranks Adams County 798th nationally by total degree days — the 75th percentile. One local detail the R-value alone won't tell you: Adams County sits in moisture regime B (dry), which can affect the vapor-barrier choice.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $269/year saved — roughly 8.5 years to break even. Call this borderline rather than a clear win.
Getting it done in Adams County
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 Adams County job, not a quote. You should get more than one quote before signing anything - expect at least a $600 minimum charge from most contractors.
Where these figures come from
Adams County'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.