Cimarron County, OK Insulation Payback
Cimarron County, OK: what topping up your attic actually costs
DOE classifies Cimarron County as climate zone 4, mixed-dry — dry heat in summer giving way to a properly cold winter. 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 $1,387 a year in heating and cooling — a payback around 2.5 years. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $1,178/year heating, $210/year cooling. Out of every 100 US counties tracked here, Cimarron County's savings potential beats roughly 45 of them. Within zone 4 specifically, it ranks 415th of 825 counties by estimated savings. Oklahoma averages $1,260/year across the counties tracked here; Cimarron County comes in 10% higher.
Where these numbers come from
The heating and cooling degree days behind this estimate — 4,405 HDD and 1,305 CDD (base 65°F, 1991-2020 normals) — come from BOISE CITY 2 E, OK US, the nearest NOAA station with published normals, 2.7 miles from Cimarron County's center. Combined heating and cooling load puts Cimarron County in the 45th percentile of this 3,162-county dataset. Cimarron County falls in DOE's moisture regime B (dry), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $202/year saved — roughly 11.3 years to break even. This one is a genuine toss-up, not a clear yes.
Getting it done in Cimarron County
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 Cimarron County's estimated $1,387/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.