Montgomery County, AR Insulation Payback
Attic insulation payback for Montgomery County, AR
DOE classifies Montgomery County as climate zone 3, mixed-humid — a genuine mix of cold winters and humid summers, with neither one dominating the bill. Its recommended attic R-value for bare joists is R-49. For an attic around 1,000 square feet, closing the gap from R-2 to R-49 costs around $2,820 and saves an estimated $1,210 a year — payback in roughly 2.3 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Montgomery County
Of that, about $963/year comes from reduced heating and $247/year from reduced cooling load through the ceiling. Montgomery County beats 32% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Montgomery County ranks 85th. Against Arkansas's own average of $1,185/year, Montgomery County runs 2% above that.
Montgomery County's actual weather, not a national average
NOAA's MT IDA 3 SE, AR US station, 4.4 miles from Montgomery County, supplies the 3,631 HDD and 1,547 CDD this estimate runs on. Combined heating and cooling load puts Montgomery County in the 31th percentile of this 3,162-county dataset. DOE also classifies Montgomery County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
The smaller top-up scenario
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 $163/year saved (~9.9-year payback). It is close - the payback only just fits a reasonable timeframe.
Getting it done in Montgomery County
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 Montgomery County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.