Gregg County, TX Insulation Payback
Attic insulation payback for Gregg County, TX
Gregg County, Texas is zone 3 under DOE's climate map (Hot-Humid), which means summers that stay hot and humid while winters barely register on the energy bill. An uninsulated attic there should be built up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.8 years at an estimated $1,009/year saved. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $621/year comes from reduced heating and $388/year from reduced cooling load through the ceiling. Gregg County beats 17% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Gregg County ranks 451st. Against Texas's own average of $1,035/year, Gregg County runs 3% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,339 HDD and 2,436 CDD (base 65°F, 1991-2020 normals) — come from LONGVIEW, TX US, the nearest NOAA station with published normals, 5.9 miles from Gregg County's center. Combined heating and cooling load puts Gregg County in the 19th percentile of this 3,162-county dataset. DOE also classifies Gregg County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
If Gregg 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 $136/year — payback about 11.9 years. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Gregg County attic
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 Gregg County, not a bid - contractors typically charge a $600 minimum regardless of job size.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.