Antrim County, MI Insulation Payback
Antrim County, MI: what topping up your attic actually costs
DOE classifies Antrim County as climate zone 6, cold — cold enough that heating, not cooling, is what decides the bill. 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 1.7 years at an estimated $1,996/year saved. That's about as fast as attic paybacks get.
Heating vs. cooling in Antrim County
The estimated savings split roughly $1,926/year heating, $70/year cooling. Out of every 100 US counties tracked here, Antrim County's savings potential beats roughly 82 of them. Within zone 6 specifically, it ranks 396th of 459 counties by estimated savings. Michigan averages $2,064/year across the counties tracked here; Antrim County comes in 3% lower.
The climate data behind this
Antrim County's climate figures — 7,202 heating and 436 cooling degree days a year — are read from E JORDAN, MI US, 10.3 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Antrim County 602nd nationally by total degree days — the 81th percentile. Antrim County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
The smaller top-up scenario
If Antrim 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 $291/year — payback about 7.8 years. That is a solid payback as home upgrades go.
Getting it done in Antrim County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Antrim County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.