Grant County, KS Insulation Payback
Is attic insulation worth it in Grant County, KS?
Grant County, Kansas is zone 4 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. An uninsulated attic there should be built up to R-60. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,614 a year — payback in roughly 2.2 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,407/year of that and cooling about $207/year — Grant County needs both. Nationally, Grant County ranks in the 60th percentile for insulation savings potential. Compared only against its own climate zone, Grant County places 38th out of 825. Against Kansas's own average of $1,594/year, Grant County runs 1% above that.
The climate data behind this
NOAA's ULYSSES 3NE, KS US station, 3.5 miles from Grant County, supplies the 5,263 HDD and 1,286 CDD this estimate runs on. Combined heating and cooling load puts Grant County in the 62th percentile of this 3,162-county dataset. 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?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $235/year saved — roughly 9.7 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Grant 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 Grant County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Grant County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Grant 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.