Monona County, IA Insulation Payback
Attic insulation payback for Monona County, IA
Monona County sits in IECC climate zone 5 (Cold) — cold enough that heating, not cooling, is what decides the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $1,968 a year in heating and cooling — a payback around 1.8 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Monona County
Of that, about $1,839/year comes from reduced heating and $129/year from reduced cooling load through the ceiling. Monona County beats 81% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Monona County ranks 74th. Against Iowa's own average of $1,985/year, Monona County runs 1% below that.
The climate data behind this
NOAA's CASTANA EXP FARM, IA US station, 6.2 miles from Monona County, supplies the 6,879 HDD and 804 CDD this estimate runs on. Combined heating and cooling load puts Monona County in the 82th percentile of this 3,162-county dataset. DOE also classifies Monona County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $287/year saved — roughly 7.9 years to break even. Topping up the attic pays for itself here.
Next steps for a Monona County attic
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 Monona County's estimated $1,968/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.