Sheridan County, WY Insulation Payback
Is attic insulation worth it in Sheridan County, WY?
Sheridan County sits in IECC climate zone 6 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $2,087 a year — payback in roughly 1.7 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $2,017/year of that and cooling about $71/year — Sheridan County needs both. Nationally, Sheridan County ranks in the 86th percentile for insulation savings potential. Compared only against its own climate zone, Sheridan County places 307th out of 459. Against Wyoming's own average of $2,161/year, Sheridan County runs 3% below that.
Sheridan County's actual weather, not a national average
NOAA's SHERIDAN CO AP, WY US station, 4.4 miles from Sheridan County, supplies the 7,542 HDD and 441 CDD this estimate runs on. That combined heating-and-cooling load ranks Sheridan County 461st nationally by total degree days — the 85th percentile. Its moisture regime is classified dry, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
If the attic isn't bare
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 $304/year saved (~7.5-year payback). The math clears comfortably within a normal ownership horizon.
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 Sheridan County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Sheridan County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Sheridan 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.