Yuma County, CO Insulation Payback
Is attic insulation worth it in Yuma County, CO?
DOE classifies Yuma 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 $1,743 a year in heating and cooling — a payback around 2 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $1,590/year of that and cooling about $152/year — Yuma County needs both. Nationally, Yuma County ranks in the 69th percentile for insulation savings potential. Compared only against its own climate zone, Yuma County places 401st out of 745. Against Colorado's own average of $2,043/year, Yuma County runs 15% below that.
The climate data behind this
The heating and cooling degree days behind this estimate — 5,948 HDD and 949 CDD (base 65°F, 1991-2020 normals) — come from WRAY, CO US, the nearest NOAA station with published normals, 12.7 miles from Yuma County's center. Combined heating and cooling load puts Yuma County in the 69th percentile of this 3,162-county dataset. 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.
The smaller top-up scenario
If Yuma 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 $254/year — payback about 9 years. Whether that is worth it depends on how long you plan to stay.
Getting it done in Yuma County
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 Yuma County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Yuma County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Yuma 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.