Hanson County, SD Insulation Payback
Is attic insulation worth it in Hanson County, SD?
DOE classifies Hanson 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 1.6 years at an estimated $2,206/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $2,105/year of that and cooling about $101/year — Hanson County needs both. Nationally, Hanson County ranks in the 90th percentile for insulation savings potential. Compared only against its own climate zone, Hanson County places 180th out of 459. Against South Dakota's own average of $2,162/year, Hanson County runs 2% above that.
The climate data behind this
Hanson County's climate figures — 7,874 heating and 626 cooling degree days a year — are read from ALEXANDRIA, SD US, 2 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Hanson County in the 91th 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 $322/year saved — roughly 7.1 years to break even. The math clears comfortably within a normal ownership horizon.
Getting it done in Hanson County
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 Hanson County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Hanson County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Hanson 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.