Iron County, WI Insulation Payback
Is attic insulation worth it in Iron County, WI?
DOE classifies Iron County as climate zone 7, very cold — a climate where the heating season stretches across most of the year. Its recommended attic R-value for bare joists is 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 1.4 years at an estimated $2,507/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $2,461/year of that and cooling about $46/year — Iron County needs both. Nationally, Iron County ranks in the 97th percentile for insulation savings potential. Compared only against its own climate zone, Iron County places 64th out of 120. Against Wisconsin's own average of $2,200/year, Iron County runs 14% above that.
Where these numbers come from
NOAA's HURLEY, WI US station, 9.9 miles from Iron County, supplies the 9,205 HDD and 285 CDD this estimate runs on. By total degree days, Iron County sits at the 97th percentile nationally.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $366/year saved — roughly 6.2 years to break even. The math clears comfortably within a normal ownership horizon.
Getting it done in Iron 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 Iron County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Iron County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Iron County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.