Phillips County, KS Insulation Payback
Phillips County, KS: what topping up your attic actually costs
DOE classifies Phillips County as climate zone 5, cold — a real winter that drives most of the annual energy bill here. Its recommended attic R-value for bare joists is R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $1,725 a year in heating and cooling — a payback around 2 years.
That's about as fast as attic paybacks get.
Heating vs. cooling in Phillips County
The estimated savings split roughly $1,507/year heating, $218/year cooling. Out of every 100 US counties tracked here, Phillips County's savings potential beats roughly 68 of them. Within zone 5 specifically, it ranks 437th of 754 counties by estimated savings. Kansas averages $1,594/year across the counties tracked here; Phillips County comes in 8% higher.
Phillips County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 5,636 HDD and 1,359 CDD (base 65°F, 1991-2020 normals) — come from Phillipsburg #2, KS US, the nearest NOAA station with published normals, 2.7 miles from Phillips County's center. By total degree days, Phillips County sits at the 71st percentile nationally. Phillips County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
The smaller top-up scenario
If Phillips 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 $252/year — payback about 9.1 years. This one is a genuine toss-up, not a clear yes.
Quotes and materials for this job
Get quotes from at least two local contractors 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 checking upfront given Phillips County's estimated $1,725/year on the line.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-60 is the target here specifically.