Daviess County, KY Insulation Payback
Daviess County, KY: what topping up your attic actually costs
Daviess County sits in IECC climate zone 4 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $1,359 a year in heating and cooling — a payback around 2.6 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Daviess County
The estimated savings split roughly $1,131/year heating, $227/year cooling. Out of every 100 US counties tracked here, Daviess County's savings potential beats roughly 43 of them. Within zone 4 specifically, it ranks 464th of 825 counties by estimated savings. Kentucky averages $1,385/year across the counties tracked here; Daviess County comes in 2% lower.
Where these numbers come from
The heating and cooling degree days behind this estimate — 4,231 HDD and 1,416 CDD (base 65°F, 1991-2020 normals) — come from CALHOUN LOCK 2, KY US, the nearest NOAA station with published normals, 16.9 miles from Daviess County's center. Combined heating and cooling load puts Daviess County in the 43th percentile of this 3,162-county dataset. Daviess County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
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 $198/year saved (~11.5-year payback). This one is a genuine toss-up, not a clear yes.
Next steps for a Daviess 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 Daviess County's estimated $1,359/year on the line.
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.