Claiborne County, MS Insulation Payback
Claiborne County attic insulation, by the numbers
Claiborne County, Mississippi is zone 3 under DOE's climate map (Hot-Humid), which means humid heat for much of the year, with cooling running far more than heating ever does. An uninsulated attic there should be built up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.9 years at an estimated $968/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $574 a year on the heating side, $394 on cooling. By estimated insulation savings, Claiborne County lands in the 14th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Claiborne County comes in 543rd by savings. Mississippi averages $1,022/year across the counties tracked here; Claiborne County comes in 5% lower.
Claiborne County's actual weather, not a national average
NOAA's PORT GIBSON 1 NE, MS US station, 3.4 miles from Claiborne County, supplies the 2,163 HDD and 2,470 CDD this estimate runs on. That combined heating-and-cooling load ranks Claiborne County 2697th nationally by total degree days — the 15th percentile. One local detail the R-value alone won't tell you: Claiborne County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
If the attic isn't bare
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $130/year saved — roughly 12.4 years to break even. Call this borderline rather than a clear win.
Getting it done in Claiborne 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 Claiborne County's estimated $968/year on the line.
Where these figures come from
Claiborne 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.