George County, MS Insulation Payback
George County, MS: what topping up your attic actually costs
George County sits in IECC climate zone 3 (Hot-Humid) — long, muggy summers and mild winters, where cooling dominates the energy 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 $843 a year in heating and cooling — a payback around 3.3 years. The math clears comfortably within a normal ownership horizon.
Where the savings come from
The estimated savings split roughly $429/year heating, $414/year cooling. Out of every 100 US counties tracked here, George County's savings potential beats roughly 6 of them. Within zone 3 specifically, it ranks 676th of 690 counties by estimated savings. Mississippi averages $1,022/year across the counties tracked here; George County comes in 18% lower.
George County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 1,616 HDD and 2,599 CDD (base 65°F, 1991-2020 normals) — come from MOBILE, AL US, the nearest NOAA station with published normals, 26.8 miles from George County's center. That combined heating-and-cooling load ranks George County 3012th nationally by total degree days — the 5th percentile. George County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
If George County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-38. That smaller top-up costs around $1,620 and saves an estimated $114/year — payback about 14.3 years. This one is a genuine toss-up, not a clear yes.
Next steps for a George County attic
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $2,820 figure above as a planning number for George County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-49 is the target here specifically.