Brewster County, TX Insulation Payback
Attic insulation payback for Brewster County, TX
Brewster County sits in IECC climate zone 3 (Hot-Dry) — scorching, dry summers where heat radiating straight through the roof does most of the damage. 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 $959 a year — payback in roughly 2.9 years. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $475/year comes from reduced heating and $484/year from reduced cooling load through the ceiling. Brewster County beats 14% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Brewster County ranks 556th. Against Texas's own average of $1,035/year, Brewster County runs 7% below that.
Brewster County's actual weather, not a national average
NOAA's PERSIMMON GAP, TX US station, 11.3 miles from Brewster County, supplies the 1,789 HDD and 3,037 CDD this estimate runs on. Combined heating and cooling load puts Brewster County in the 20th percentile of this 3,162-county dataset. DOE also classifies Brewster County as moisture regime B (dry) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
A shallower starting point changes the math: with R-11 already down, only the gap to R-38 needs filling, at roughly $1,620 for an estimated $129/year saved (~12.5-year payback). It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Brewster 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.