Hall County, TX Insulation Payback
Hall County attic insulation, by the numbers
DOE classifies Hall County as climate zone 3, hot-dry — scorching, dry summers where heat radiating straight through the roof does most of the damage. 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 $1,176 a year — payback in roughly 2.4 years. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $815 a year on the heating side, $361 on cooling. By estimated insulation savings, Hall County lands in the 29th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Hall County comes in 125th by savings. Texas averages $1,035/year across the counties tracked here; Hall County comes in 14% higher.
The climate data behind this
NOAA's CHILDRESS MUNI AP, TX US station, 16.8 miles from Hall County, supplies the 3,072 HDD and 2,265 CDD this estimate runs on. That combined heating-and-cooling load ranks Hall County 2038th nationally by total degree days — the 36th percentile. One local detail the R-value alone won't tell you: Hall County sits in moisture regime B (dry), which can affect the vapor-barrier choice.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $158/year saved — roughly 10.2 years to break even. Call this borderline rather than a clear win.
Quotes and materials for this job
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 Hall County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Hall County's R-49 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-49 is the target here specifically.