Muskegon County, MI Insulation Payback
Muskegon County attic insulation, by the numbers
Muskegon County, Michigan is zone 5 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. 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 $1,920 a year — payback in roughly 1.8 years. Topping up the attic pays for itself fast here.
Heating vs. cooling in Muskegon County
Split it out and it's roughly $1,856 a year on the heating side, $64 on cooling. By estimated insulation savings, Muskegon County lands in the 78th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Muskegon County comes in 123rd by savings. Michigan averages $2,064/year across the counties tracked here; Muskegon County comes in 7% lower.
The climate data behind this
NOAA's MONTAGUE 4 NW, MI US station, 2.3 miles from Muskegon County, supplies the 6,941 HDD and 400 CDD this estimate runs on. Combined heating and cooling load puts Muskegon County in the 77th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Muskegon County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
If Muskegon 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 $280/year — payback about 8.1 years. Call this borderline rather than a clear win.
Quotes and materials for this job
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 Muskegon County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Muskegon 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.