Lincoln County, MT Insulation Payback
Attic insulation payback for Lincoln County, MT
DOE classifies Lincoln County as climate zone 6, 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 $1,872 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 Lincoln County
Of that, about $1,811/year comes from reduced heating and $61/year from reduced cooling load through the ceiling. Lincoln County beats 76% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Lincoln County ranks 445th. Against Montana's own average of $2,182/year, Lincoln County runs 14% below that.
Lincoln County's actual weather, not a national average
NOAA's LIBBY 1 NE RS, MT US station, 10.9 miles from Lincoln County, supplies the 6,774 HDD and 379 CDD this estimate runs on. That combined heating-and-cooling load ranks Lincoln County 814th nationally by total degree days — the 74th percentile. DOE also classifies Lincoln 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
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $273/year saved — roughly 8.3 years to break even. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Lincoln 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 Lincoln 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.