Frio County, TX Insulation Payback
Attic insulation payback for Frio County, TX
DOE classifies Frio County as climate zone 2, hot-humid — humid heat for much of the year, with cooling running far more than heating ever does. Its recommended attic R-value for bare joists is 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 $881 a year in heating and cooling — a payback around 3.2 years. Worth doing on the numbers alone.
Where the savings come from
Of that, about $330/year comes from reduced heating and $551/year from reduced cooling load through the ceiling. Frio County beats 8% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 233 counties DOE places in zone 2, Frio County ranks 71st. Against Texas's own average of $1,035/year, Frio County runs 15% below that.
Where these numbers come from
Frio County's climate figures — 1,243 heating and 3,456 cooling degree days a year — are read from DILLEY, TX US, 13.8 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Frio County sits at the 17th percentile nationally. DOE also classifies Frio County as moisture regime B (dry) - ask a local contractor whether that changes the vapor-barrier approach for this job.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $119/year saved — roughly 13.7 years to break even. 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 Frio 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.