Stark County, IL Insulation Payback
Is attic insulation worth it in Stark County, IL?
Stark County, Illinois is zone 5 under DOE's climate map (Cold), which means a real winter that drives most of the annual energy bill here. An uninsulated attic there should be built up to R-60. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,846 a year — payback in roughly 1.9 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,713/year of that and cooling about $133/year — Stark County needs both. Nationally, Stark County ranks in the 75th percentile for insulation savings potential. Compared only against its own climate zone, Stark County places 212th out of 745. Against Illinois's own average of $1,642/year, Stark County runs 12% above that.
The climate data behind this
Stark County's climate figures — 6,407 heating and 829 cooling degree days a year — are read from KEWANEE 1 E, IL US, 11.4 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Stark County sits at the 76th 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
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 $269/year saved (~8.5-year payback). 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 Stark County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Stark County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Stark 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.