Billings County, ND Insulation Payback
Is attic insulation worth it in Billings County, ND?
Billings County sits in IECC climate zone 6 (Cold) — winters that dominate the energy bill, with cooling a minor factor. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $2,293 a year — payback in roughly 1.5 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $2,223/year of that and cooling about $71/year — Billings County needs both. Nationally, Billings County ranks in the 93th percentile for insulation savings potential. Compared only against its own climate zone, Billings County places 103rd out of 459. Against North Dakota's own average of $2,496/year, Billings County runs 8% below that.
The climate data behind this
Billings County's climate figures — 8,313 heating and 439 cooling degree days a year — are read from MEDORA 7 E, ND US, 7.8 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Billings County 221st nationally by total degree days — the 93th percentile. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
Already have some insulation?
If Billings 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 $335/year — payback about 6.8 years. The math clears comfortably within a normal ownership horizon.
Getting it done in Billings County
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 Billings County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Billings County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Billings County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.