Sedgwick County, CO Insulation Payback
Sedgwick County, CO: what topping up your attic actually costs
DOE classifies Sedgwick County as climate zone 5, cold — a real winter that drives most of the annual energy bill here. Its recommended attic R-value for bare joists is 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 $1,843 a year in heating and cooling — a payback around 1.9 years. That's about as fast as attic paybacks get.
Where the savings come from
The estimated savings split roughly $1,711/year heating, $133/year cooling. Out of every 100 US counties tracked here, Sedgwick County's savings potential beats roughly 75 of them. Within zone 5 specifically, it ranks 215th of 745 counties by estimated savings. Colorado averages $2,043/year across the counties tracked here; Sedgwick County comes in 10% lower.
Where these numbers come from
Sedgwick County's climate figures — 6,399 heating and 825 cooling degree days a year — are read from SEDGWICK 5 S, CO US, 8.4 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Sedgwick County in the 75th percentile of this 3,162-county dataset. Sedgwick County falls in DOE's moisture regime B (dry), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
If Sedgwick County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $269/year — payback about 8.5 years. This one is a genuine toss-up, not a clear yes.
Getting it done in Sedgwick 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 Sedgwick County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-60 is the target here specifically.