Cross County, AR Insulation Payback
Cross County, AR: what topping up your attic actually costs
DOE classifies Cross 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 $1,187/year saved. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $839/year heating, $348/year cooling. Out of every 100 US counties tracked here, Cross County's savings potential beats roughly 30 of them. Within zone 3 specifically, it ranks 111th of 690 counties by estimated savings. Arkansas averages $1,185/year across the counties tracked here; Cross County comes in 0% higher.
The climate data behind this
The heating and cooling degree days behind this estimate — 3,163 HDD and 2,183 CDD (base 65°F, 1991-2020 normals) — come from WYNNE, AR US, the nearest NOAA station with published normals, 2.8 miles from Cross County's center. By total degree days, Cross County sits at the 36th percentile nationally. Cross 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 $160/year saved — roughly 10.1 years to break even. This one is a genuine toss-up, not a clear yes.
Quotes and materials for this job
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 Cross County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.