Hamilton County, KS Insulation Payback
Is attic insulation worth it in Hamilton County, KS?
Hamilton County, Kansas is zone 5 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. 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 $1,646 a year in heating and cooling — a payback around 2.1 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,450/year of that and cooling about $195/year — Hamilton County needs both. Nationally, Hamilton County ranks in the 63th percentile for insulation savings potential. Compared only against its own climate zone, Hamilton County places 578th out of 745. Against Kansas's own average of $1,594/year, Hamilton County runs 3% above that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 5,424 HDD and 1,217 CDD (base 65°F, 1991-2020 normals) — come from SYRACUSE 1NE, KS US, the nearest NOAA station with published normals, 2.8 miles from Hamilton County's center. By total degree days, Hamilton County sits at the 65th 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.
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 $240/year saved — roughly 9.5 years to break even. Whether that is worth it depends on how long you plan to stay.
Getting it done in Hamilton County
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 Hamilton County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Hamilton County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Hamilton 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.