Ziebach County, SD Insulation Payback
Ziebach County attic insulation, by the numbers
DOE classifies Ziebach County as climate zone 6, cold — a real winter that drives most of the annual energy bill here. Its recommended attic R-value for bare joists is 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 $2,049 a year — payback in roughly 1.7 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,904 a year on the heating side, $145 on cooling. By estimated insulation savings, Ziebach County lands in the 84th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Ziebach County comes in 352nd by savings. South Dakota averages $2,162/year across the counties tracked here; Ziebach County comes in 5% lower.
Where these numbers come from
NOAA's DUPREE, SD US station, 4.9 miles from Ziebach County, supplies the 7,122 HDD and 900 CDD this estimate runs on. Combined heating and cooling load puts Ziebach County in the 86th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Ziebach County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
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 $299/year saved — roughly 7.6 years to break even. Worth doing on the numbers alone.
Getting it done in Ziebach 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 Ziebach County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Where these figures come from
Ziebach County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.