Carver County, MN Insulation Payback
Attic insulation payback for Carver County, MN
DOE classifies Carver County as climate zone 6, cold — cold enough that heating, not cooling, is what decides the bill. Its recommended attic R-value for bare joists is 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 1.5 years at an estimated $2,265/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $2,176/year comes from reduced heating and $89/year from reduced cooling load through the ceiling. Carver County beats 92% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Carver County ranks 125th. Against Minnesota's own average of $2,366/year, Carver County runs 4% below that.
The climate data behind this
NOAA's CHASKA 2NW, MN US station, 8.3 miles from Carver County, supplies the 8,138 HDD and 557 CDD this estimate runs on. By total degree days, Carver County sits at the 93th percentile nationally. DOE also classifies Carver County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $330/year saved — roughly 6.9 years to break even. Topping up the attic pays for itself here.
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 Carver County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.