Daniels County, MT Insulation Payback
Daniels County attic insulation, by the numbers
Daniels County, Montana is zone 6 under DOE's climate map (Cold), which means a real winter that drives most of the annual energy bill here. An uninsulated attic there should be built up to 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 $2,534 a year — payback in roughly 1.4 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $2,485 a year on the heating side, $49 on cooling. By estimated insulation savings, Daniels County lands in the 98th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Daniels County comes in 8th by savings. Montana averages $2,182/year across the counties tracked here; Daniels County comes in 16% higher.
Where these numbers come from
Daniels County's climate figures — 9,292 heating and 305 cooling degree days a year — are read from SCOBEY 4 NW, MT US, 4.2 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Daniels County in the 98th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Daniels County sits in moisture regime B (dry), which can affect the vapor-barrier choice.
Already have some insulation?
If Daniels 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 $370/year — payback about 6.2 years. 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 Daniels County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Daniels 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.