Reagan County, TX Insulation Payback
Is attic insulation worth it in Reagan County, TX?
Reagan County, Texas is zone 3 under DOE's climate map (Hot-Dry), which means intense summer heat with low humidity, where attic radiant heat gain is the main driver. 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 $975 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 $577/year of that and cooling about $399/year — Reagan County needs both. Nationally, Reagan County ranks in the 15th percentile for insulation savings potential. Compared only against its own climate zone, Reagan County places 528th out of 690. Against Texas's own average of $1,035/year, Reagan County runs 6% below that.
Reagan County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 2,173 HDD and 2,503 CDD (base 65°F, 1991-2020 normals) — come from BIG LAKE 2, TX US, the nearest NOAA station with published normals, 12.5 miles from Reagan County's center. Combined heating and cooling load puts Reagan County in the 16th percentile of this 3,162-county dataset. Its moisture regime is classified dry, 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 Reagan 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 12.3 years. Whether that is worth it depends on how long you plan to stay.
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 Reagan County's estimated $975/year on the line.
Reagan County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Reagan 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.