Henry County, IA Insulation Payback
Is attic insulation worth it in Henry County, IA?
Henry 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. 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 1.9 years at an estimated $1,837/year saved. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,706/year of that and cooling about $131/year — Henry County needs both. Nationally, Henry County ranks in the 74th percentile for insulation savings potential. Compared only against its own climate zone, Henry County places 227th out of 745. Against Iowa's own average of $1,985/year, Henry County runs 7% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 6,380 HDD and 814 CDD (base 65°F, 1991-2020 normals) — come from MT PLEASANT 1 SSW, IA US, the nearest NOAA station with published normals, 2.7 miles from Henry County's center. By total degree days, Henry County sits at the 75th 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.
Already have some insulation?
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 $268/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
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 Henry County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Henry County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Henry 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.