Jo Daviess County, IL Insulation Payback
Attic insulation payback for Jo Daviess County, IL
Jo Daviess County sits in IECC climate zone 5 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $1,981 a year in heating and cooling — a payback around 1.8 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Jo Daviess County
Of that, about $1,872/year comes from reduced heating and $109/year from reduced cooling load through the ceiling. Jo Daviess County beats 81% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Jo Daviess County ranks 61st. Against Illinois's own average of $1,642/year, Jo Daviess County runs 21% above that.
Where these numbers come from
Jo Daviess County's climate figures — 7,003 heating and 677 cooling degree days a year — are read from ELIZABETH, IL US, 3.3 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Jo Daviess County 574th nationally by total degree days — the 82th percentile. DOE also classifies Jo Daviess County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $289/year saved — roughly 7.9 years to break even. Topping up the attic pays for itself here.
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 Jo Daviess County job, not a quote. Expect at least a $600 minimum charge from most contractors.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.