McPherson County, SD Insulation Payback
Attic insulation payback for McPherson County, SD
McPherson County sits in IECC climate zone 6 (Cold) — winters that dominate the energy bill, with cooling a minor factor. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $2,408 a year in heating and cooling — a payback around 1.4 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $2,344/year comes from reduced heating and $63/year from reduced cooling load through the ceiling. McPherson County beats 96% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, McPherson County ranks 29th. Against South Dakota's own average of $2,162/year, McPherson County runs 11% above that.
Where these numbers come from
NOAA's ABERDEEN 35 WNW, SD US station, 6.4 miles from McPherson County, supplies the 8,768 HDD and 395 CDD this estimate runs on. Combined heating and cooling load puts McPherson County in the 96th percentile of this 3,162-county dataset. DOE also classifies McPherson County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $351/year saved (~6.5-year payback). Topping up the attic pays for itself here.
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 McPherson County, not a bid - contractors typically charge a $600 minimum regardless of job size.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.