Butler County, IA Insulation Payback
Attic insulation payback for Butler County, IA
DOE classifies Butler County as climate zone 6, cold — cold enough that heating, not cooling, is what decides the bill. Its recommended attic R-value for bare joists is R-60. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $2,082 a year — payback in roughly 1.7 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,967/year comes from reduced heating and $114/year from reduced cooling load through the ceiling. Butler County beats 86% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Butler County ranks 312th. Against Iowa's own average of $1,985/year, Butler County runs 5% above that.
Butler County's actual weather, not a national average
Butler County's climate figures — 7,358 heating and 711 cooling degree days a year — are read from ALLISON, IA US, 1.7 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Butler County in the 87th percentile of this 3,162-county dataset. DOE also classifies Butler 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-49 needs filling, at roughly $2,280 for an estimated $304/year saved (~7.5-year payback). Topping up the attic pays for itself here.
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 Butler County's estimated $2,082/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.