Cass County, ND Insulation Payback
Attic insulation payback for Cass County, ND
Cass County, North Dakota is zone 7 under DOE's climate map (Very Cold), which means severe, long winters where heating is nearly the whole story. 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 1.4 years at an estimated $2,509/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $2,437/year comes from reduced heating and $72/year from reduced cooling load through the ceiling. Cass County beats 97% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 120 counties DOE places in zone 7, Cass County ranks 63rd. Against North Dakota's own average of $2,496/year, Cass County runs 1% above that.
Cass County's actual weather, not a national average
Cass County's climate figures — 9,114 heating and 449 cooling degree days a year — are read from CASSELTON AGRONOMY FARM, ND US, 3.6 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Cass County in the 98th percentile of this 3,162-county dataset.
If the attic isn't bare
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 $366/year saved (~6.2-year payback). Topping up the attic pays for itself here.
Next steps for a Cass County attic
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Cass County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.