Greene County, AR Insulation Payback
Greene County, AR: what topping up your attic actually costs
Greene County, Arkansas 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. 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 $1,270 a year in heating and cooling — a payback around 2.2 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Greene County
The estimated savings split roughly $984/year heating, $286/year cooling. Out of every 100 US counties tracked here, Greene County's savings potential beats roughly 36 of them. Within zone 3 specifically, it ranks 43rd of 690 counties by estimated savings. Arkansas averages $1,185/year across the counties tracked here; Greene County comes in 7% higher.
Greene County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 3,710 HDD and 1,795 CDD (base 65°F, 1991-2020 normals) — come from PARAGOULD 1S, AR US, the nearest NOAA station with published normals, 7.1 miles from Greene County's center. That combined heating-and-cooling load ranks Greene County 1903rd nationally by total degree days — the 40th percentile. Greene County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $171/year saved — roughly 9.5 years to break even. This one is a genuine toss-up, not a clear yes.
Next steps for a Greene 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 Greene 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.