Lee County, MS Insulation Payback
Attic insulation payback for Lee County, MS
Lee 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. 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 $1,118 a year — payback in roughly 2.5 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Lee County
Of that, about $800/year comes from reduced heating and $318/year from reduced cooling load through the ceiling. Lee 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, Lee County ranks 216th. Against Mississippi's own average of $1,022/year, Lee County runs 9% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 3,014 HDD and 1,998 CDD (base 65°F, 1991-2020 normals) — come from TUPELO 2, MS US, the nearest NOAA station with published normals, 5.1 miles from Lee County's center. That combined heating-and-cooling load ranks Lee County 2332nd nationally by total degree days — the 26th percentile. DOE also classifies Lee County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $151/year saved (~10.8-year payback). It is close - the payback only just fits a reasonable timeframe.
Getting it done in Lee County
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 Lee 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.