Pepin County, WI Insulation Payback
Attic insulation payback for Pepin County, WI
DOE classifies Pepin 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 $2,174 a year — payback in roughly 1.6 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $2,081/year comes from reduced heating and $93/year from reduced cooling load through the ceiling. Pepin County beats 89% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Pepin County ranks 214th. Against Wisconsin's own average of $2,200/year, Pepin County runs 1% below that.
The climate data behind this
The heating and cooling degree days behind this estimate — 7,784 HDD and 578 CDD (base 65°F, 1991-2020 normals) — come from DURAND, WI US, the nearest NOAA station with published normals, 7.1 miles from Pepin County's center. That combined heating-and-cooling load ranks Pepin County 338th nationally by total degree days — the 89th percentile. DOE also classifies Pepin 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
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $317/year saved — roughly 7.2 years to break even. 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 Pepin County's estimated $2,174/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.