Sioux County, NE Insulation Payback
Sioux County attic insulation, by the numbers
Sioux County sits in IECC climate zone 5 (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. 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 $2,115/year saved. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $2,058 a year on the heating side, $58 on cooling. By estimated insulation savings, Sioux County lands in the 87th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Sioux County comes in 13th by savings. Nebraska averages $1,872/year across the counties tracked here; Sioux County comes in 13% higher.
Sioux County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 7,695 HDD and 358 CDD (base 65°F, 1991-2020 normals) — come from HARRISON 20 SSE, NE US, the nearest NOAA station with published normals, 3.2 miles from Sioux County's center. That combined heating-and-cooling load ranks Sioux County 437th nationally by total degree days — the 86th percentile. One local detail the R-value alone won't tell you: Sioux 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 $309/year saved (~7.4-year payback). Worth doing on the numbers alone.
Getting it done in Sioux County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Sioux County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Sioux 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.