Goodhue County, MN Insulation Payback
Attic insulation payback for Goodhue County, MN
DOE classifies Goodhue County as climate zone 6, cold — a real winter that drives most of the annual energy bill here. Its recommended attic R-value for bare joists is 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 $2,254 a year in heating and cooling — a payback around 1.5 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $2,173/year comes from reduced heating and $81/year from reduced cooling load through the ceiling. Goodhue County beats 92% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Goodhue County ranks 135th. Against Minnesota's own average of $2,366/year, Goodhue County runs 5% below that.
Where these numbers come from
Goodhue County's climate figures — 8,127 heating and 507 cooling degree days a year — are read from ZUMBROTA, MN US, 7.8 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Goodhue County sits at the 92th percentile nationally. DOE also classifies Goodhue 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
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 $329/year saved (~6.9-year payback). Topping up the attic pays for itself here.
Next steps for a Goodhue County attic
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 Goodhue 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.