Guadalupe County, NM Insulation Payback
Guadalupe County attic insulation, by the numbers
Guadalupe County, New Mexico is zone 4 under DOE's climate map (Mixed-Dry), which means big seasonal swings - a dry hot summer, then a real winter cold snap. An uninsulated attic there should be built up to 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 $1,188 a year in heating and cooling — a payback around 2.9 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $982 a year on the heating side, $205 on cooling. By estimated insulation savings, Guadalupe County lands in the 30th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Guadalupe County comes in 762nd by savings. New Mexico averages $1,423/year across the counties tracked here; Guadalupe County comes in 17% lower.
Guadalupe County's actual weather, not a national average
NOAA's SANTA ROSA, NM US station, 7 miles from Guadalupe County, supplies the 3,674 HDD and 1,278 CDD this estimate runs on. That combined heating-and-cooling load ranks Guadalupe County 2387th nationally by total degree days — the 25th percentile. One local detail the R-value alone won't tell you: Guadalupe County sits in moisture regime B (dry), which can affect the vapor-barrier choice.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $173/year saved — roughly 13.2 years to break even. Call this borderline rather than a clear win.
Getting it done in Guadalupe 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 Guadalupe County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Guadalupe County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.