Walworth County, WI Insulation Payback
Attic insulation payback for Walworth County, WI
Walworth County, Wisconsin is zone 6 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 $1,955/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,854/year comes from reduced heating and $101/year from reduced cooling load through the ceiling. Walworth County beats 80% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Walworth County ranks 422nd. Against Wisconsin's own average of $2,200/year, Walworth County runs 11% below that.
Walworth County's actual weather, not a national average
NOAA's DELAVAN WWTP, WI US station, 6.4 miles from Walworth County, supplies the 6,933 HDD and 631 CDD this estimate runs on. By total degree days, Walworth County sits at the 80th percentile nationally. DOE also classifies Walworth 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 $285/year saved (~8-year payback). Topping up the attic pays for itself here.
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 Walworth 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.