Cass County, MI Insulation Payback
Attic insulation payback for Cass County, MI
DOE classifies Cass County as climate zone 5, cold — cold enough that heating, not cooling, is what decides the bill. Its recommended attic R-value for bare joists is 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 $1,893 a year in heating and cooling — a payback around 1.8 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Cass County
Of that, about $1,799/year comes from reduced heating and $94/year from reduced cooling load through the ceiling. Cass County beats 77% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Cass County ranks 156th. Against Michigan's own average of $2,064/year, Cass County runs 8% below that.
The climate data behind this
Cass County's climate figures — 6,729 heating and 583 cooling degree days a year — are read from DOWAGIAC 1 W, MI US, 8.3 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Cass County 737th nationally by total degree days — the 77th percentile. DOE also classifies Cass County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $276/year saved — roughly 8.3 years to break even. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Cass 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 Cass County's estimated $1,893/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.