Hancock County, GA Insulation Payback
Hancock County, GA: what topping up your attic actually costs
Hancock County, Georgia is zone 3 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. An uninsulated attic there should be built 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 $993 a year — payback in roughly 2.8 years. That's about as fast as attic paybacks get.
Where the savings come from
The estimated savings split roughly $658/year heating, $335/year cooling. Out of every 100 US counties tracked here, Hancock County's savings potential beats roughly 16 of them. Within zone 3 specifically, it ranks 482nd of 690 counties by estimated savings. Georgia averages $974/year across the counties tracked here; Hancock County comes in 2% higher.
Hancock County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 2,480 HDD and 2,103 CDD (base 65°F, 1991-2020 normals) — come from MILLEDGEVILLE, GA US, the nearest NOAA station with published normals, 19.3 miles from Hancock County's center. Combined heating and cooling load puts Hancock County in the 13th percentile of this 3,162-county dataset. Hancock County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
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 $134/year saved — roughly 12.1 years to break even. This one is a genuine toss-up, not a clear yes.
Quotes and materials for this job
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 Hancock 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.