Colfax County, NE Insulation Payback
Attic insulation payback for Colfax County, NE
DOE classifies Colfax 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. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,961 a year — payback in roughly 1.8 years.
Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,817/year comes from reduced heating and $144/year from reduced cooling load through the ceiling. Colfax County beats 80% of the counties in this 3,171-county dataset on estimated insulation savings. Among the 754 counties DOE places in zone 5, Colfax County ranks 84th. Against Nebraska's own average of $1,872/year, Colfax County runs 5% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,794 HDD and 896 CDD (base 65°F, 1991-2020 normals) — come from Clarkson, NE US, the nearest NOAA station with published normals, 10.5 miles from Colfax County's center. By total degree days, Colfax County sits at the 82nd percentile nationally. DOE also classifies Colfax County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $286/year saved (~8-year payback). Topping up the attic pays for itself here.
Getting it done in Colfax County
Get quotes from at least two local contractors 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 checking upfront given Colfax County's estimated $1,961/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.