Woodruff County, AR Insulation Payback
Woodruff County attic insulation, by the numbers
DOE classifies Woodruff County as climate zone 3, mixed-humid — real heating and real cooling seasons both, roughly balanced across the year. Its recommended attic R-value for bare joists is R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.4 years at an estimated $1,161/year saved. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $806 a year on the heating side, $356 on cooling. By estimated insulation savings, Woodruff County lands in the 29th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Woodruff County comes in 142nd by savings. Arkansas averages $1,185/year across the counties tracked here; Woodruff County comes in 2% lower.
Where these numbers come from
The heating and cooling degree days behind this estimate — 3,037 HDD and 2,232 CDD (base 65°F, 1991-2020 normals) — come from DES ARC, AR US, the nearest NOAA station with published normals, 20.7 miles from Woodruff County's center. That combined heating-and-cooling load ranks Woodruff County 2114th nationally by total degree days — the 33th percentile. One local detail the R-value alone won't tell you: Woodruff County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
A shallower starting point changes the math: with R-11 already down, only the gap to R-38 needs filling, at roughly $1,620 for an estimated $156/year saved (~10.4-year payback). Call this borderline rather than a clear win.
Quotes and materials for this job
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 Woodruff County's estimated $1,161/year on the line.
Where these figures come from
Woodruff 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.