Keokuk County, IA Insulation Payback
Attic insulation payback for Keokuk County, IA
Keokuk County, Iowa is zone 5 under DOE's climate map (Cold), which means a real winter that drives most of the annual energy bill here. An uninsulated attic there should be built 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 1.8 years at an estimated $1,905/year saved. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,776/year comes from reduced heating and $129/year from reduced cooling load through the ceiling. Keokuk County beats 78% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Keokuk County ranks 143rd. Against Iowa's own average of $1,985/year, Keokuk County runs 4% below that.
Keokuk County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 6,641 HDD and 806 CDD (base 65°F, 1991-2020 normals) — come from SIGOURNEY, IA US, the nearest NOAA station with published normals, 3.1 miles from Keokuk County's center. Combined heating and cooling load puts Keokuk County in the 78th percentile of this 3,162-county dataset. DOE also classifies Keokuk 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
If Keokuk County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $278/year — payback about 8.2 years. 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 Keokuk 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.