Fayette County, TX Insulation Payback
Attic insulation payback for Fayette County, TX
Fayette County, Texas is zone 2 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. 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 $923 a year in heating and cooling — a payback around 3.1 years. Worth doing on the numbers alone.
The breakdown behind the number
Of that, about $430/year comes from reduced heating and $493/year from reduced cooling load through the ceiling. Fayette County beats 11% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 233 counties DOE places in zone 2, Fayette County ranks 29th. Against Texas's own average of $1,035/year, Fayette County runs 11% below that.
The climate data behind this
Fayette County's climate figures — 1,620 heating and 3,092 cooling degree days a year — are read from LA GRANGE, TX US, 3.8 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Fayette County sits at the 17th percentile nationally. DOE also classifies Fayette County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
If the attic isn't bare
If Fayette 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 $124/year — payback about 13 years. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Fayette 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 Fayette 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.