Lampasas County, TX Insulation Payback
Is attic insulation worth it in Lampasas County, TX?
Lampasas County sits in IECC climate zone 3 (Hot-Humid) — long, muggy summers and mild winters, where cooling dominates the energy bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $1,005 a year — payback in roughly 2.8 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $587/year of that and cooling about $418/year — Lampasas County needs both. Nationally, Lampasas County ranks in the 17th percentile for insulation savings potential. Compared only against its own climate zone, Lampasas County places 464th out of 690. Against Texas's own average of $1,035/year, Lampasas County runs 3% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,212 HDD and 2,622 CDD (base 65°F, 1991-2020 normals) — come from LAMPASAS, TX US, the nearest NOAA station with published normals, 9.3 miles from Lampasas County's center. By total degree days, Lampasas County sits at the 21th 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 Lampasas 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 $135/year — payback about 12 years. Whether that is worth it depends on how long you plan to stay.
Getting it done in Lampasas County
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 Lampasas County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Lampasas County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Lampasas 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.