Crawford County, IA Insulation Payback
Is attic insulation worth it in Crawford County, IA?
DOE classifies Crawford County as climate zone 6, 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 1.7 years at an estimated $2,023/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $1,902/year of that and cooling about $121/year — Crawford County needs both. Nationally, Crawford County ranks in the 83th percentile for insulation savings potential. Compared only against its own climate zone, Crawford County places 376th out of 459. Against Iowa's own average of $1,985/year, Crawford County runs 2% above that.
Crawford County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 7,112 HDD and 755 CDD (base 65°F, 1991-2020 normals) — come from DENISON, IA US, the nearest NOAA station with published normals, 3.1 miles from Crawford County's center. That combined heating-and-cooling load ranks Crawford County 493rd nationally by total degree days — the 84th 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
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 $295/year saved (~7.7-year payback). The math clears comfortably within a normal ownership horizon.
Next steps for a Crawford County attic
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 Crawford County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Crawford County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Crawford 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.