Cotton County, OK Insulation Payback
Cotton County, OK: what topping up your attic actually costs
DOE classifies Cotton County as climate zone 3, mixed-humid — real heating and real cooling seasons both, roughly balanced across the year. Its recommended attic R-value for bare joists is R-49. For an attic around 1,000 square feet, closing the gap from R-2 to R-49 costs around $2,820 and saves an estimated $1,221 a year — payback in roughly 2.3 years. That's about as fast as attic paybacks get.
Where the savings come from
The estimated savings split roughly $860/year heating, $361/year cooling. Out of every 100 US counties tracked here, Cotton County's savings potential beats roughly 33 of them. Within zone 3 specifically, it ranks 73rd of 690 counties by estimated savings. Oklahoma averages $1,260/year across the counties tracked here; Cotton County comes in 3% lower.
Where these numbers come from
The heating and cooling degree days behind this estimate — 3,241 HDD and 2,264 CDD (base 65°F, 1991-2020 normals) — come from WALTERS, OK US, the nearest NOAA station with published normals, 6.4 miles from Cotton County's center. By total degree days, Cotton County sits at the 40th percentile nationally. Cotton County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
If Cotton County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-38. That smaller top-up costs around $1,620 and saves an estimated $164/year — payback about 9.9 years. This one is a genuine toss-up, not a clear yes.
Getting it done in Cotton County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $2,820 as a starting estimate for a Cotton County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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-49 is the target here specifically.