Garrard County, KY Insulation Payback
Garrard County attic insulation, by the numbers
DOE classifies Garrard County as climate zone 4, mixed-humid — heating load in winter and cooling load in summer, both worth taking seriously here. 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 $1,291 a year in heating and cooling — a payback around 2.7 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,105 a year on the heating side, $186 on cooling. By estimated insulation savings, Garrard County lands in the 38th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Garrard County comes in 602nd by savings. Kentucky averages $1,385/year across the counties tracked here; Garrard County comes in 7% lower.
Where these numbers come from
Garrard County's climate figures — 4,131 heating and 1,161 cooling degree days a year — are read from CRAB ORCHARD 6 N, KY US, 11.3 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Garrard County 2090th nationally by total degree days — the 34th percentile. One local detail the R-value alone won't tell you: Garrard 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 $188/year saved — roughly 12.1 years to break even. Call this borderline rather than a clear win.
Next steps for a Garrard County attic
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 Garrard County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Garrard 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.