Evans County, GA Insulation Payback
Evans County attic insulation, by the numbers
Evans County sits in IECC climate zone 2 (Hot-Humid) — humid heat for much of the year, with cooling running far more than heating ever does. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. For an attic around 1,000 square feet, closing the gap from R-2 to R-49 costs around $2,820 and saves an estimated $881 a year — payback in roughly 3.2 years. Topping up the attic pays for itself here.
Heating vs. cooling in Evans County
Split it out and it's roughly $507 a year on the heating side, $375 on cooling. By estimated insulation savings, Evans County lands in the 9th percentile nationally. Zone 2 alone covers 233 counties in this dataset, and Evans County comes in 67th by savings. Georgia averages $974/year across the counties tracked here; Evans County comes in 10% lower.
The climate data behind this
The heating and cooling degree days behind this estimate — 1,910 HDD and 2,351 CDD (base 65°F, 1991-2020 normals) — come from GLENNVILLE 3NW, GA US, the nearest NOAA station with published normals, 12 miles from Evans County's center. By total degree days, Evans County sits at the 6th percentile nationally. One local detail the R-value alone won't tell you: Evans County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $119/year saved — roughly 13.6 years to break even. Call this borderline rather than a clear win.
Getting it done in Evans 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 Evans County's estimated $881/year on the line.
Where these figures come from
Evans 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.