Logan County, OK Insulation Payback
Logan County, OK: what topping up your attic actually costs
Logan County sits in IECC climate zone 3 (Mixed-Humid) — heating load in winter and cooling load in summer, both worth taking seriously here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.2 years at an estimated $1,279/year saved. That's about as fast as attic paybacks get.
Heating vs. cooling in Logan County
The estimated savings split roughly $945/year heating, $334/year cooling. Out of every 100 US counties tracked here, Logan County's savings potential beats roughly 37 of them. Within zone 3 specifically, it ranks 37th of 690 counties by estimated savings. Oklahoma averages $1,260/year across the counties tracked here; Logan County comes in 2% higher.
The climate data behind this
NOAA's GUTHRIE MUNI AP, OK US station, 4.8 miles from Logan County, supplies the 3,563 HDD and 2,093 CDD this estimate runs on. By total degree days, Logan County sits at the 44th percentile nationally. Logan County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $172/year saved — roughly 9.4 years to break even. This one is a genuine toss-up, not a clear yes.
Quotes and materials for this job
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 Logan County's estimated $1,279/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-49 is the target here specifically.