Aurora County, SD Insulation Payback
Aurora County attic insulation, by the numbers
Aurora County sits in IECC climate zone 6 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 1.6 years at an estimated $2,147/year saved. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $2,028 a year on the heating side, $119 on cooling. By estimated insulation savings, Aurora County lands in the 88th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Aurora County comes in 241st by savings. South Dakota averages $2,162/year across the counties tracked here; Aurora County comes in 1% lower.
Aurora County's actual weather, not a national average
Aurora County's climate figures — 7,584 heating and 743 cooling degree days a year — are read from WHITE LAKE, SD US, 5.4 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Aurora County 346th nationally by total degree days — the 89th percentile. One local detail the R-value alone won't tell you: Aurora County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $313/year saved (~7.3-year payback). Worth doing on the numbers alone.
Quotes and materials for this job
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Aurora County's estimated $2,147/year on the line.
Where these figures come from
Aurora 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.