Carbon County, UT Insulation Payback
Attic insulation payback for Carbon County, UT
DOE classifies Carbon County as climate zone 6, 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 $1,825 a year in heating and cooling — a payback around 1.9 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Carbon County
Of that, about $1,706/year comes from reduced heating and $119/year from reduced cooling load through the ceiling. Carbon County beats 74% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Carbon County ranks 454th. Against Utah's own average of $1,791/year, Carbon County runs 2% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,379 HDD and 744 CDD (base 65°F, 1991-2020 normals) — come from PRICE CARBON CO AP, UT US, the nearest NOAA station with published normals, 9.9 miles from Carbon County's center. By total degree days, Carbon County sits at the 74th percentile nationally. DOE also classifies Carbon County as moisture regime B (dry) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
If Carbon 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 $266/year — payback about 8.6 years. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Carbon 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 Carbon County's estimated $1,825/year on the line.
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.