Terrell County, TX Insulation Payback
Attic insulation payback for Terrell County, TX
Terrell County, Texas is zone 3 under DOE's climate map (Hot-Dry), which means scorching, dry summers where heat radiating straight through the roof does most of the damage. 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 $926 a year in heating and cooling — a payback around 3 years. Worth doing on the numbers alone.
Heating vs. cooling in Terrell County
Of that, about $458/year comes from reduced heating and $467/year from reduced cooling load through the ceiling. Terrell County beats 11% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Terrell County ranks 619th. Against Texas's own average of $1,035/year, Terrell County runs 11% below that.
Terrell County's actual weather, not a national average
NOAA's DRYDEN TERRELL CO AP, TX US station, 15.3 miles from Terrell County, supplies the 1,728 HDD and 2,933 CDD this estimate runs on. That combined heating-and-cooling load ranks Terrell County 2673rd nationally by total degree days — the 15th percentile. DOE also classifies Terrell 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 $125/year saved — roughly 13 years to break even. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Terrell County
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Terrell County's estimated $926/year on the line.
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.