Manitowoc County, WI Insulation Payback
Manitowoc County attic insulation, by the numbers
Manitowoc 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. 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 $2,125 a year — payback in roughly 1.6 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $2,080 a year on the heating side, $45 on cooling. By estimated insulation savings, Manitowoc County lands in the 87th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Manitowoc County comes in 274th by savings. Wisconsin averages $2,200/year across the counties tracked here; Manitowoc County comes in 3% lower.
Where these numbers come from
Manitowoc County's climate figures — 7,779 heating and 282 cooling degree days a year — are read from TWO RIVERS, WI US, 1 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Manitowoc County 430th nationally by total degree days — the 86th percentile. One local detail the R-value alone won't tell you: Manitowoc County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
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 $310/year saved (~7.4-year payback). Worth doing on the numbers alone.
Getting it done in Manitowoc 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 Manitowoc County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Manitowoc County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.