Montezuma County, CO Insulation Payback
Is attic insulation worth it in Montezuma County, CO?
DOE classifies Montezuma 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. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.1 years at an estimated $1,665/year saved. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,555/year of that and cooling about $110/year — Montezuma County needs both. Nationally, Montezuma County ranks in the 64th percentile for insulation savings potential. Compared only against its own climate zone, Montezuma County places 545th out of 745. Against Colorado's own average of $2,043/year, Montezuma County runs 19% below that.
Where these numbers come from
Montezuma County's climate figures — 5,817 heating and 682 cooling degree days a year — are read from CORTEZ, CO US, 0.4 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Montezuma County 1215th nationally by total degree days — the 62th 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.
Already have some insulation?
If Montezuma 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 $243/year — payback about 9.4 years. Whether that is worth it depends on how long you plan to stay.
Getting it done in Montezuma 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 Montezuma County's estimated $1,665/year on the line.
Montezuma County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Montezuma 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.