Anderson County, TX Insulation Payback
Is attic insulation worth it in Anderson County, TX?
DOE classifies Anderson County as climate zone 2, hot-humid — humid heat for much of the year, with cooling running far more than heating ever does. 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 $986 a year — payback in roughly 2.9 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $591/year of that and cooling about $395/year — Anderson County needs both. Nationally, Anderson County ranks in the 16th percentile for insulation savings potential. Compared only against its own climate zone, Anderson County places 7th out of 233. Against Texas's own average of $1,035/year, Anderson County runs 5% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,229 HDD and 2,478 CDD (base 65°F, 1991-2020 normals) — come from PALESTINE 2 NE, TX US, the nearest NOAA station with published normals, 5.3 miles from Anderson County's center. Combined heating and cooling load puts Anderson County in the 17th 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
A shallower starting point changes the math: with R-11 already down, only the gap to R-38 needs filling, at roughly $1,620 for an estimated $133/year saved (~12.2-year payback). 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 Anderson County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Anderson County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Anderson 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.