Cedar County, IA Insulation Payback
Cedar County attic insulation, by the numbers
Cedar County, Iowa 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. 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 $1,899 a year in heating and cooling — a payback around 1.8 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,758 a year on the heating side, $142 on cooling. By estimated insulation savings, Cedar County lands in the 77th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Cedar County comes in 149th by savings. Iowa averages $1,985/year across the counties tracked here; Cedar County comes in 4% lower.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,573 HDD and 882 CDD (base 65°F, 1991-2020 normals) — come from TIPTON, IA US, the nearest NOAA station with published normals, 0.6 miles from Cedar County's center. That combined heating-and-cooling load ranks Cedar County 679th nationally by total degree days — the 79th percentile. One local detail the R-value alone won't tell you: Cedar County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $277/year saved — roughly 8.2 years to break even. Call this borderline rather than a clear win.
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 Cedar County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Where these figures come from
Cedar 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.