Greene County, OH Insulation Payback
Greene County, OH: what topping up your attic actually costs
Greene County sits in IECC climate zone 5 (Cold) — winters that dominate the energy bill, with cooling a minor factor. 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 $1,509 a year in heating and cooling — a payback around 2.3 years. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $1,354/year heating, $155/year cooling. Out of every 100 US counties tracked here, Greene County's savings potential beats roughly 53 of them. Within zone 5 specifically, it ranks 724th of 745 counties by estimated savings. Ohio averages $1,669/year across the counties tracked here; Greene County comes in 10% lower.
Where these numbers come from
Greene County's climate figures — 5,064 heating and 967 cooling degree days a year — are read from XENIA 6 SSE, OH US, 5.8 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Greene County in the 52th percentile of this 3,162-county dataset. Greene County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
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 $220/year saved (~10.4-year payback). This one is a genuine toss-up, not a clear yes.
Getting it done in Greene County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Greene County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.