Franklin County, AR Insulation Payback
Attic insulation payback for Franklin County, AR
Franklin County, Arkansas is zone 3 under DOE's climate map (Mixed-Humid), which means a genuine mix of cold winters and humid summers, with neither one dominating the bill. 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 $1,231 a year in heating and cooling — a payback around 2.3 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $941/year comes from reduced heating and $290/year from reduced cooling load through the ceiling. Franklin County beats 33% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Franklin County ranks 66th. Against Arkansas's own average of $1,185/year, Franklin County runs 4% above that.
Franklin County's actual weather, not a national average
Franklin County's climate figures — 3,548 heating and 1,820 cooling degree days a year — are read from OZARK 2, AR US, 1.1 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Franklin County sits at the 36th percentile nationally. DOE also classifies Franklin County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $166/year saved (~9.8-year payback). It is close - the payback only just fits a reasonable timeframe.
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 Franklin County job, not a quote. Expect at least a $600 minimum charge from most contractors.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.