Monroe County, MS Insulation Payback
Attic insulation payback for Monroe County, MS
Monroe County, Mississippi is zone 3 under DOE's climate map (Mixed-Humid), which means real heating and real cooling seasons both, roughly balanced across the year. An uninsulated attic there should be built up to 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 $1,110 a year — payback in roughly 2.5 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $823/year comes from reduced heating and $287/year from reduced cooling load through the ceiling. Monroe County beats 25% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Monroe County ranks 226th. Against Mississippi's own average of $1,022/year, Monroe County runs 9% above that.
Where these numbers come from
Monroe County's climate figures — 3,101 heating and 1,803 cooling degree days a year — are read from ABERDEEN, MS US, 4.6 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Monroe County sits at the 23th percentile nationally. DOE also classifies Monroe 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 $150/year saved (~10.8-year payback). It is close - the payback only just fits a reasonable timeframe.
Next steps for a Monroe County attic
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 Monroe 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.