Brown County, KS Insulation Payback
Attic insulation payback for Brown County, KS
DOE classifies Brown County as climate zone 4, mixed-humid — real heating and real cooling seasons both, roughly balanced across the year. 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 2 years at an estimated $1,699/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,514/year comes from reduced heating and $185/year from reduced cooling load through the ceiling. Brown County beats 66% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Brown County ranks 3rd. Against Kansas's own average of $1,594/year, Brown County runs 7% above that.
Where these numbers come from
NOAA's HIAWATHA 1 S, KS US station, 2.1 miles from Brown County, supplies the 5,664 HDD and 1,152 CDD this estimate runs on. Combined heating and cooling load puts Brown County in the 68th percentile of this 3,162-county dataset. DOE also classifies Brown County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
The smaller top-up scenario
If Brown 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 $248/year — payback about 9.2 years. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Brown 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 Brown 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.