Wayne County, IN Insulation Payback
Wayne County attic insulation, by the numbers
DOE classifies Wayne County as climate zone 5, cold — winters that dominate the energy bill, with cooling a minor factor. 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 $1,631 a year in heating and cooling — a payback around 2.1 years. Topping up the attic pays for itself fast here.
Heating vs. cooling in Wayne County
Split it out and it's roughly $1,480 a year on the heating side, $151 on cooling. By estimated insulation savings, Wayne County lands in the 62th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Wayne County comes in 602nd by savings. Indiana averages $1,634/year across the counties tracked here; Wayne County comes in 0% higher.
The climate data behind this
The heating and cooling degree days behind this estimate — 5,535 HDD and 941 CDD (base 65°F, 1991-2020 normals) — come from RICHMOND WTR WKS, IN US, the nearest NOAA station with published normals, 6.9 miles from Wayne County's center. Combined heating and cooling load puts Wayne County in the 61th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Wayne County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $238/year saved (~9.6-year payback). Call this borderline rather than a clear win.
Next steps for a Wayne 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 Wayne County's estimated $1,631/year on the line.
Where these figures come from
Wayne 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.