Eau Claire County, WI Insulation Payback
Attic insulation payback for Eau Claire County, WI
DOE classifies Eau Claire County as climate zone 6, cold — winters that dominate the energy bill, with cooling a minor factor. 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 $2,299 a year — payback in roughly 1.5 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Eau Claire County
Of that, about $2,223/year comes from reduced heating and $76/year from reduced cooling load through the ceiling. Eau Claire County beats 93% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Eau Claire County ranks 97th. Against Wisconsin's own average of $2,200/year, Eau Claire County runs 5% above that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 8,313 HDD and 475 CDD (base 65°F, 1991-2020 normals) — come from AUGUSTA RS, WI US, the nearest NOAA station with published normals, 8 miles from Eau Claire County's center. By total degree days, Eau Claire County sits at the 93th percentile nationally. DOE also classifies Eau Claire 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 $335/year saved — roughly 6.8 years to break even. Topping up the attic pays for itself here.
Getting it done in Eau Claire 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 Eau Claire 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.