Roscommon County, MI Insulation Payback
Roscommon County, MI: what topping up your attic actually costs
Roscommon County, Michigan is zone 6 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 $2,166 a year — payback in roughly 1.6 years. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $2,112/year heating, $54/year cooling. Out of every 100 US counties tracked here, Roscommon County's savings potential beats roughly 89 of them. Within zone 6 specifically, it ranks 222nd of 459 counties by estimated savings. Michigan averages $2,064/year across the counties tracked here; Roscommon County comes in 5% higher.
Roscommon County's actual weather, not a national average
Roscommon County's climate figures — 7,898 heating and 337 cooling degree days a year — are read from HOUGHTON LK ROSCOMMON AP, MI US, 3.4 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Roscommon County 368th nationally by total degree days — the 88th percentile. Roscommon County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
If Roscommon 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 $316/year — payback about 7.2 years. That is a solid payback as home upgrades go.
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 Roscommon 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.