Kemper County, MS Insulation Payback
Is attic insulation worth it in Kemper County, MS?
Kemper County sits in IECC climate zone 3 (Mixed-Humid) — heating load in winter and cooling load in summer, both worth taking seriously here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $962 a year in heating and cooling — a payback around 2.9 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $566/year of that and cooling about $397/year — Kemper County needs both. Nationally, Kemper County ranks in the 14th percentile for insulation savings potential. Compared only against its own climate zone, Kemper County places 553rd out of 690. Against Mississippi's own average of $1,022/year, Kemper County runs 6% below that.
Kemper County's actual weather, not a national average
Kemper County's climate figures — 2,132 heating and 2,488 cooling degree days a year — are read from MERIDIAN NAAS, MS US, 14.2 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Kemper County 2713th nationally by total degree days — the 14th percentile. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
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 $130/year saved (~12.5-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Kemper County
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Kemper County's estimated $962/year on the line.
Kemper County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Kemper County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.