Clearwater County, MN Insulation Payback
Clearwater County attic insulation, by the numbers
DOE classifies Clearwater County as climate zone 7, very cold — severe, long winters where heating is nearly the whole story. 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 $2,661 a year — payback in roughly 1.3 years. Topping up the attic pays for itself fast here.
Heating vs. cooling in Clearwater County
Split it out and it's roughly $2,614 a year on the heating side, $46 on cooling. By estimated insulation savings, Clearwater County lands in the 99th percentile nationally. Zone 7 alone covers 120 counties in this dataset, and Clearwater County comes in 30th by savings. Minnesota averages $2,366/year across the counties tracked here; Clearwater County comes in 12% higher.
Clearwater County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 9,778 HDD and 287 CDD (base 65°F, 1991-2020 normals) — come from FOSSTON 1 E, MN US, the nearest NOAA station with published normals, 16.5 miles from Clearwater County's center. That combined heating-and-cooling load ranks Clearwater County 38th nationally by total degree days — the 99th percentile.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $388/year saved — roughly 5.9 years to break even. Worth doing on the numbers alone.
Next steps for a Clearwater County attic
Get more than one quote 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 asking upfront given Clearwater County's estimated $2,661/year on the line.
Where these figures come from
Clearwater 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.