Union County, OR Insulation Payback
Attic insulation payback for Union County, OR
Union County sits in IECC climate zone 5 (Cold) — cold enough that heating, not cooling, is what decides the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $1,716 a year in heating and cooling — a payback around 2 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,640/year comes from reduced heating and $77/year from reduced cooling load through the ceiling. Union County beats 67% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Union County ranks 455th. Against Oregon's own average of $1,557/year, Union County runs 10% above that.
Where these numbers come from
Union County's climate figures — 6,132 heating and 477 cooling degree days a year — are read from LA GRANDE, OR US, 3.8 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Union County sits at the 64th percentile nationally. DOE also classifies Union 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
If Union 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 $250/year — payback about 9.1 years. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Union 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 Union 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.