Jackson County, SD Insulation Payback
Attic insulation payback for Jackson County, SD
Jackson County, South Dakota 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 $1,906 a year in heating and cooling — a payback around 1.8 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,771/year comes from reduced heating and $135/year from reduced cooling load through the ceiling. Jackson County beats 78% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Jackson County ranks 142nd. Against South Dakota's own average of $2,162/year, Jackson County runs 12% below that.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,622 HDD and 841 CDD (base 65°F, 1991-2020 normals) — come from LONGVALLEY, SD US, the nearest NOAA station with published normals, 16.4 miles from Jackson County's center. Combined heating and cooling load puts Jackson County in the 79th percentile of this 3,162-county dataset. DOE also classifies Jackson County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $278/year saved — roughly 8.2 years to break even. It is close - the payback only just fits a reasonable timeframe.
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 Jackson 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.