Luce County, MI Insulation Payback
Luce County, MI: what topping up your attic actually costs
Luce 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. 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 $2,340 a year — payback in roughly 1.5 years. That's about as fast as attic paybacks get.
Where the savings come from
The estimated savings split roughly $2,305/year heating, $36/year cooling. Out of every 100 US counties tracked here, Luce County's savings potential beats roughly 94 of them. Within zone 7 specifically, it ranks 105th of 120 counties by estimated savings. Michigan averages $2,064/year across the counties tracked here; Luce County comes in 13% higher.
Luce County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 8,620 HDD and 222 CDD (base 65°F, 1991-2020 normals) — come from NEWBERRY CORRECTIONAL FACILITY, MI US, the nearest NOAA station with published normals, 12.6 miles from Luce County's center. By total degree days, Luce County sits at the 94th percentile nationally.
The smaller top-up scenario
If Luce County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $341/year — payback about 6.7 years. That is a solid payback as home upgrades go.
Getting it done in Luce 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 Luce County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-60 is the target here specifically.