Starke County, IN Insulation Payback
Starke County attic insulation, by the numbers
Starke County, Indiana is zone 5 under DOE's climate map (Cold), which means a real winter that drives most of the annual energy bill here. An uninsulated attic there should be built up to 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 1.9 years at an estimated $1,796/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,684 a year on the heating side, $112 on cooling. By estimated insulation savings, Starke County lands in the 72th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Starke County comes in 300th by savings. Indiana averages $1,634/year across the counties tracked here; Starke County comes in 10% higher.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,298 HDD and 697 CDD (base 65°F, 1991-2020 normals) — come from KNOX WWTP, IN US, the nearest NOAA station with published normals, 1.7 miles from Starke County's center. Combined heating and cooling load puts Starke County in the 71th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Starke County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
If the attic isn't bare
If Starke 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 $262/year — payback about 8.7 years. Call this borderline rather than a clear win.
Quotes and materials for this job
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 Starke County's estimated $1,796/year on the line.
Where these figures come from
Starke 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.