Garza County, TX Insulation Payback
Garza County, TX: what topping up your attic actually costs
Garza County sits in IECC climate zone 3 (Hot-Dry) — desert-dry heat for much of the year, with the attic taking the brunt of it. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-49 runs an estimated $2,820, and saves about $1,140 a year in heating and cooling — a payback around 2.5 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Garza County
The estimated savings split roughly $795/year heating, $345/year cooling. Out of every 100 US counties tracked here, Garza County's savings potential beats roughly 27 of them. Within zone 3 specifically, it ranks 177th of 690 counties by estimated savings. Texas averages $1,035/year across the counties tracked here; Garza County comes in 10% higher.
Where these numbers come from
NOAA's POST, TX US station, 4.4 miles from Garza County, supplies the 2,998 HDD and 2,164 CDD this estimate runs on. That combined heating-and-cooling load ranks Garza County 2207th nationally by total degree days — the 30th percentile. Garza County falls in DOE's moisture regime B (dry), 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 $154/year saved — roughly 10.5 years to break even. This one is a genuine toss-up, not a clear yes.
Getting it done in Garza County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $2,820 figure above as a planning number for Garza County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.