Real County, TX Insulation Payback
Attic insulation payback for Real County, TX
DOE classifies Real County as climate zone 2, hot-humid — long, muggy summers and mild winters, where cooling dominates the energy bill. Its recommended attic R-value for bare joists is 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 $627/year comes from reduced heating and $331/year from reduced cooling load through the ceiling. Real County beats 14% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 233 counties DOE places in zone 2, Real County ranks 15th. Against Texas's own average of $1,035/year, Real County runs 7% below that.
The climate data behind this
Real County's climate figures — 2,364 heating and 2,079 cooling degree days a year — are read from PRADE RCH, TX US, 6.1 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Real County 2849th nationally by total degree days — the 10th percentile. DOE also classifies Real 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
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.
Getting it done in Real County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $2,820 as a starting estimate for a Real County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.