Harding County, NM Insulation Payback
Attic insulation payback for Harding County, NM
DOE classifies Harding County as climate zone 5, cold — winters that dominate the energy bill, with cooling a minor factor. 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 $1,422 a year in heating and cooling — a payback around 2.4 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,277/year comes from reduced heating and $145/year from reduced cooling load through the ceiling. Harding County beats 47% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Harding County ranks 740th. Against New Mexico's own average of $1,423/year, Harding County runs 0% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 4,776 HDD and 902 CDD (base 65°F, 1991-2020 normals) — come from MOSQUERO 1 NE, NM US, the nearest NOAA station with published normals, 6.4 miles from Harding County's center. That combined heating-and-cooling load ranks Harding County 1768th nationally by total degree days — the 44th percentile. DOE also classifies Harding County as moisture regime B (dry) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $207/year saved (~11-year payback). It is close - the payback only just fits a reasonable timeframe.
Next steps for a Harding County attic
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 Harding 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.