Leon County, TX Insulation Payback
Is attic insulation worth it in Leon County, TX?
Leon County, Texas is zone 2 under DOE's climate map (Hot-Humid), which means humid heat for much of the year, with cooling running far more than heating ever does. An uninsulated attic there should be built 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 $973 a year in heating and cooling — a payback around 2.9 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $578/year of that and cooling about $394/year — Leon County needs both. Nationally, Leon County ranks in the 15th percentile for insulation savings potential. Compared only against its own climate zone, Leon County places 11th out of 233. Against Texas's own average of $1,035/year, Leon County runs 6% below that.
Where these numbers come from
Leon County's climate figures — 2,179 heating and 2,475 cooling degree days a year — are read from CENTERVILLE, TX US, 3.2 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Leon County in the 15th percentile of this 3,162-county dataset. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
If Leon 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 $131/year — payback about 12.4 years. Whether that is worth it depends on how long you plan to stay.
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 Leon County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Leon County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Leon County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.