Iowa County, WI Insulation Payback
Attic insulation payback for Iowa County, WI
Iowa County, Wisconsin is zone 6 under DOE's climate map (Cold), which means winters that dominate the energy bill, with cooling a minor factor. 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 $2,101 a year in heating and cooling — a payback around 1.7 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $2,016/year comes from reduced heating and $85/year from reduced cooling load through the ceiling. Iowa 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, Iowa County ranks 293rd. Against Wisconsin's own average of $2,200/year, Iowa County runs 4% below that.
The climate data behind this
Iowa County's climate figures — 7,541 heating and 529 cooling degree days a year — are read from DODGEVILLE WWTP, WI US, 2.9 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Iowa County sits at the 87th percentile nationally. DOE also classifies Iowa 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 $307/year saved — roughly 7.4 years to break even. Topping up the attic pays for itself here.
Getting it done in Iowa County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Iowa County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.