Roosevelt County, NM Insulation Payback
Is attic insulation worth it in Roosevelt County, NM?
DOE classifies Roosevelt County as climate zone 4, mixed-dry — a wide swing between a hot dry summer and a cold winter. 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 $1,198 a year in heating and cooling — a payback around 2.9 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $966/year of that and cooling about $232/year — Roosevelt County needs both. Nationally, Roosevelt County ranks in the 31th percentile for insulation savings potential. Compared only against its own climate zone, Roosevelt County places 751st out of 825. Against New Mexico's own average of $1,423/year, Roosevelt County runs 16% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 3,613 HDD and 1,443 CDD (base 65°F, 1991-2020 normals) — come from ELIDA, NM US, the nearest NOAA station with published normals, 11.4 miles from Roosevelt County's center. By total degree days, Roosevelt County sits at the 27th percentile nationally. 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
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 $175/year saved (~13-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Roosevelt County
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Roosevelt County's estimated $1,198/year on the line.
Roosevelt County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Roosevelt 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.