Edgar County, IL Insulation Payback
Is attic insulation worth it in Edgar County, IL?
DOE classifies Edgar County as climate zone 5, cold — winters that dominate the energy bill, with cooling a minor factor. Its recommended attic R-value for bare joists is 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 years at an estimated $1,714/year saved. Few home upgrades pay back that quickly.
Heating vs. cooling in Edgar County
Heating accounts for about $1,565/year of that and cooling about $149/year — Edgar County needs both. Nationally, Edgar County ranks in the 67th percentile for insulation savings potential. Compared only against its own climate zone, Edgar County places 458th out of 745. Against Illinois's own average of $1,642/year, Edgar County runs 4% above that.
Edgar County's actual weather, not a national average
NOAA's PARIS STP, IL US station, 6 miles from Edgar County, supplies the 5,853 HDD and 928 CDD this estimate runs on. That combined heating-and-cooling load ranks Edgar County 1034th nationally by total degree days — the 67th percentile. 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 Edgar 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 $250/year — payback about 9.1 years. Whether that is worth it depends on how long you plan to stay.
Quotes and materials for this job
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Edgar County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Edgar County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Edgar 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.