Wayne County, MS Insulation Payback
Attic insulation payback for Wayne County, MS
Wayne County sits in IECC climate zone 3 (Hot-Humid) — long, muggy summers and mild winters, where cooling dominates the energy 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 3 years at an estimated $946/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $582/year comes from reduced heating and $364/year from reduced cooling load through the ceiling. Wayne County beats 13% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Wayne County ranks 583rd. Against Mississippi's own average of $1,022/year, Wayne County runs 7% below that.
Wayne County's actual weather, not a national average
NOAA's WAYNESBORO 2 W, MS US station, 2.4 miles from Wayne County, supplies the 2,194 HDD and 2,281 CDD this estimate runs on. By total degree days, Wayne County sits at the 11th percentile nationally. DOE also classifies Wayne County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
If the attic isn't bare
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 $127/year saved (~12.7-year payback). It is close - the payback only just fits a reasonable timeframe.
Getting it done in Wayne 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 Wayne 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.