Sunflower County, MS Insulation Payback
Sunflower County attic insulation, by the numbers
Sunflower County sits in IECC climate zone 3 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-49 runs an estimated $2,820, and saves about $1,065 a year in heating and cooling — a payback around 2.6 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $690 a year on the heating side, $375 on cooling. By estimated insulation savings, Sunflower County lands in the 22th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Sunflower County comes in 321st by savings. Mississippi averages $1,022/year across the counties tracked here; Sunflower County comes in 4% higher.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,601 HDD and 2,354 CDD (base 65°F, 1991-2020 normals) — come from MOORHEAD, MS US, the nearest NOAA station with published normals, 11.7 miles from Sunflower County's center. That combined heating-and-cooling load ranks Sunflower County 2384th nationally by total degree days — the 25th percentile. One local detail the R-value alone won't tell you: Sunflower 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-38 needs filling, at roughly $1,620 for an estimated $143/year saved (~11.3-year payback). Call this borderline rather than a clear win.
Getting it done in Sunflower County
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 Sunflower County's estimated $1,065/year on the line.
Where these figures come from
Sunflower County's R-49 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-49 is the target here specifically.