Henry County, MO Insulation Payback
Attic insulation payback for Henry County, MO
Henry County, Missouri is zone 4 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. An uninsulated attic there should be built up to R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $1,536 a year in heating and cooling — a payback around 2.3 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Henry County
Of that, about $1,310/year comes from reduced heating and $226/year from reduced cooling load through the ceiling. Henry County beats 55% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Henry County ranks 123rd. Against Missouri's own average of $1,534/year, Henry County runs 0% above that.
Where these numbers come from
NOAA's CLINTON, MO US station, 1.3 miles from Henry County, supplies the 4,899 HDD and 1,406 CDD this estimate runs on. Combined heating and cooling load puts Henry County in the 58th percentile of this 3,162-county dataset. DOE also classifies Henry 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-49 needs filling, at roughly $2,280 for an estimated $224/year saved (~10.2-year payback). It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Henry 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.