Iron County, MI Insulation Payback
Attic insulation payback for Iron County, MI
Iron County, Michigan is zone 7 under DOE's climate map (Very Cold), which means a climate where the heating season stretches across most of the year. An uninsulated attic there should be built up to 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 $2,610 a year in heating and cooling — a payback around 1.3 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Iron County
Of that, about $2,582/year comes from reduced heating and $28/year from reduced cooling load through the ceiling. Iron County beats 98% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 120 counties DOE places in zone 7, Iron County ranks 39th. Against Michigan's own average of $2,064/year, Iron County runs 26% above that.
The climate data behind this
NOAA's AMASA 1W, MI US station, 6.1 miles from Iron County, supplies the 9,658 HDD and 175 CDD this estimate runs on. Combined heating and cooling load puts Iron County in the 98th percentile of this 3,162-county dataset.
Already have some insulation?
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 $381/year saved (~6-year payback). Topping up the attic pays for itself here.
Next steps for a Iron County attic
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 Iron County's estimated $2,610/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.