Daviess County, IN Insulation Payback
Is attic insulation worth it in Daviess County, IN?
Daviess County, Indiana is zone 4 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. 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 2.4 years at an estimated $1,422/year saved. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,202/year of that and cooling about $220/year — Daviess County needs both. Nationally, Daviess County ranks in the 47th percentile for insulation savings potential. Compared only against its own climate zone, Daviess County places 337th out of 825. Against Indiana's own average of $1,634/year, Daviess County runs 13% below that.
Daviess County's actual weather, not a national average
NOAA's WASHINGTON 1 W, IN US station, 7.3 miles from Daviess County, supplies the 4,494 HDD and 1,370 CDD this estimate runs on. By total degree days, Daviess County sits at the 49th percentile nationally. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
If the attic isn't bare
If Daviess County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $207/year — payback about 11 years. Whether that is worth it depends on how long you plan to stay.
Quotes and materials for this job
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 Daviess County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Daviess County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Daviess County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.