Calhoun County, MS Insulation Payback
Attic insulation payback for Calhoun County, MS
DOE classifies Calhoun 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. 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 $1,074 a year in heating and cooling — a payback around 2.6 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $746/year comes from reduced heating and $328/year from reduced cooling load through the ceiling. Calhoun County beats 22% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Calhoun County ranks 301st. Against Mississippi's own average of $1,022/year, Calhoun County runs 5% above that.
Calhoun County's actual weather, not a national average
NOAA's CALHOUN CITY, MS US station, 5.5 miles from Calhoun County, supplies the 2,813 HDD and 2,057 CDD this estimate runs on. By total degree days, Calhoun County sits at the 22th percentile nationally. DOE also classifies Calhoun County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $145/year saved — roughly 11.2 years to break even. 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 Calhoun 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.