Rolette County, ND Insulation Payback
Rolette County attic insulation, by the numbers
Rolette County, North Dakota is zone 7 under DOE's climate map (Very Cold), which means winters long and harsh enough that heating is essentially the entire equation. An uninsulated attic there should be built up to 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 1.3 years at an estimated $2,723/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $2,678 a year on the heating side, $45 on cooling. By estimated insulation savings, Rolette County lands in the 99th percentile nationally. Zone 7 alone covers 120 counties in this dataset, and Rolette County comes in 20th by savings. North Dakota averages $2,496/year across the counties tracked here; Rolette County comes in 9% higher.
The climate data behind this
Rolette County's climate figures — 10,015 heating and 279 cooling degree days a year — are read from BELCOURT KEYA RADIO, ND US, 6.5 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Rolette County in the 99th percentile of this 3,162-county dataset.
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 $397/year saved (~5.7-year payback). Worth doing on the numbers alone.
Quotes and materials for this job
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 Rolette County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Rolette County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.