Long County, GA Insulation Payback
Is attic insulation worth it in Long County, GA?
Long County, Georgia is zone 2 under DOE's climate map (Hot-Humid), which means long, muggy summers and mild winters, where cooling dominates the energy bill. An uninsulated attic there should be built 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 $813 a year in heating and cooling — a payback around 3.5 years. That is a solid payback as home upgrades go.
The breakdown behind the number
Heating accounts for about $403/year of that and cooling about $410/year — Long County needs both. Nationally, Long County ranks in the 5th percentile for insulation savings potential. Compared only against its own climate zone, Long County places 157th out of 233. Against Georgia's own average of $974/year, Long County runs 17% below that.
Long County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 1,519 HDD and 2,575 CDD (base 65°F, 1991-2020 normals) — come from FT STEWART, GA US, the nearest NOAA station with published normals, 10.8 miles from Long County's center. Combined heating and cooling load puts Long County in the 3th percentile of this 3,162-county dataset. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $110/year saved — roughly 14.8 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Long County attic
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $2,820 as a starting estimate for a Long County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Long County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Long County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.