Hidalgo County, TX Insulation Payback
Attic insulation payback for Hidalgo County, TX
Hidalgo 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. 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 3.3 years at an estimated $849/year saved. Worth doing on the numbers alone.
Heating vs. cooling in Hidalgo County
Of that, about $166/year comes from reduced heating and $683/year from reduced cooling load through the ceiling. Hidalgo County beats 6% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 233 counties DOE places in zone 2, Hidalgo County ranks 116th. Against Texas's own average of $1,035/year, Hidalgo County runs 18% below that.
Where these numbers come from
Hidalgo County's climate figures — 625 heating and 4,285 cooling degree days a year — are read from EDINBURG, TX US, 6.9 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Hidalgo County 2435th nationally by total degree days — the 23th percentile. DOE also classifies Hidalgo 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
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 $114/year saved (~14.2-year payback). It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Hidalgo County's estimated $849/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.