Polk County, AR Insulation Payback
Polk County attic insulation, by the numbers
Polk County sits in IECC climate zone 3 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 2.3 years at an estimated $1,211/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $967 a year on the heating side, $244 on cooling. By estimated insulation savings, Polk County lands in the 32th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Polk County comes in 83rd by savings. Arkansas averages $1,185/year across the counties tracked here; Polk County comes in 2% higher.
The climate data behind this
Polk County's climate figures — 3,644 heating and 1,534 cooling degree days a year — are read from MENA, AR US, 8.1 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Polk County sits at the 31th percentile nationally. One local detail the R-value alone won't tell you: Polk 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 $163/year saved — roughly 9.9 years to break even. Call this borderline rather than a clear win.
Next steps for a Polk County attic
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 Polk County's estimated $1,211/year on the line.
Where these figures come from
Polk 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.