Kenedy County, TX Insulation Payback
Is attic insulation worth it in Kenedy County, TX?
DOE classifies Kenedy County as climate zone 2, hot-humid — long, muggy summers and mild winters, where cooling dominates the energy bill. 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 $842 a year — payback in roughly 3.4 years. That is a solid payback as home upgrades go.
Heating vs. cooling in Kenedy County
Heating accounts for about $226/year of that and cooling about $615/year — Kenedy County needs both. Nationally, Kenedy County ranks in the 6th percentile for insulation savings potential. Compared only against its own climate zone, Kenedy County places 126th out of 233. Against Texas's own average of $1,035/year, Kenedy County runs 19% below that.
Where these numbers come from
NOAA's ARMSTRONG 4SE, TX US station, 8.2 miles from Kenedy County, supplies the 853 HDD and 3,861 CDD this estimate runs on. By total degree days, Kenedy County sits at the 17th percentile nationally. 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.
If the attic isn't bare
If Kenedy 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 $113/year — payback about 14.3 years. Whether that is worth it depends on how long you plan to stay.
Getting it done in Kenedy County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $2,820 as a starting estimate for a Kenedy County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Kenedy County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Kenedy 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.