Hamilton County, OH Insulation Payback
Hamilton County attic insulation, by the numbers
Hamilton County, Ohio is zone 4 under DOE's climate map (Mixed-Humid), which means real heating and real cooling seasons both, roughly balanced across the year. 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 2.2 years at an estimated $1,552/year saved. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $1,375 a year on the heating side, $177 on cooling. By estimated insulation savings, Hamilton County lands in the 56th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Hamilton County comes in 96th by savings. Ohio averages $1,669/year across the counties tracked here; Hamilton County comes in 7% lower.
The climate data behind this
NOAA's CHEVIOT, OH US station, 5.1 miles from Hamilton County, supplies the 5,143 HDD and 1,099 CDD this estimate runs on. Combined heating and cooling load puts Hamilton County in the 57th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Hamilton County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
If the attic isn't bare
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $226/year saved — roughly 10.1 years to break even. 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 Hamilton County's estimated $1,552/year on the line.
Where these figures come from
Hamilton 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.