Perry County, MO Insulation Payback
Attic insulation payback for Perry County, MO
Perry County sits in IECC climate zone 4 (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-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.3 years at an estimated $1,509/year saved. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,304/year comes from reduced heating and $205/year from reduced cooling load through the ceiling. Perry County beats 53% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Perry County ranks 159th. Against Missouri's own average of $1,534/year, Perry County runs 2% below that.
Perry County's actual weather, not a national average
NOAA's PERRYVILLE WTP, MO US station, 6.6 miles from Perry County, supplies the 4,878 HDD and 1,274 CDD this estimate runs on. That combined heating-and-cooling load ranks Perry County 1424th nationally by total degree days — the 55th percentile. DOE also classifies Perry 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
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $220/year saved — roughly 10.4 years to break even. It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Perry County's estimated $1,509/year on the line.
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.