Evangeline Parish, LA Insulation Payback
Attic insulation payback for Evangeline Parish, LA
Evangeline Parish, Louisiana is zone 2 under DOE's climate map (Hot-Humid), which means long, muggy summers and mild winters, where cooling dominates the energy bill. An uninsulated attic there should be built 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 $887 a year — payback in roughly 3.2 years. Worth doing on the numbers alone.
Heating vs. cooling in Evangeline Parish
Of that, about $454/year comes from reduced heating and $433/year from reduced cooling load through the ceiling. Evangeline Parish beats 9% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 233 counties DOE places in zone 2, Evangeline Parish ranks 57th. Against Louisiana's own average of $906/year, Evangeline Parish runs 2% below that.
The climate data behind this
Evangeline Parish's climate figures — 1,710 heating and 2,718 cooling degree days a year — are read from EUNICE, LA US, 15.9 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Evangeline Parish 2872nd nationally by total degree days — the 9th percentile. DOE also classifies Evangeline Parish as moisture regime A (humid) - 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 $119/year saved (~13.6-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 Evangeline Parish, 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.