Acadia Parish, LA Insulation Payback
Acadia Parish, LA: what topping up your attic actually costs
DOE classifies Acadia Parish 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 $862 a year — payback in roughly 3.3 years. The math clears comfortably within a normal ownership horizon.
The breakdown behind the number
The estimated savings split roughly $418/year heating, $443/year cooling. Out of every 100 US counties tracked here, Acadia Parish's savings potential beats roughly 7 of them. Within zone 2 specifically, it ranks 96th of 233 counties by estimated savings. Louisiana averages $906/year across the counties tracked here; Acadia Parish comes in 5% lower.
Acadia Parish's actual weather, not a national average
NOAA's CROWLEY 2 NE, LA US station, 5.1 miles from Acadia Parish, supplies the 1,577 HDD and 2,781 CDD this estimate runs on. That combined heating-and-cooling load ranks Acadia Parish 2918th nationally by total degree days — the 8th percentile. Acadia Parish falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
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 $116/year saved (~14-year payback). This one is a genuine toss-up, not a clear yes.
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 Acadia Parish's estimated $862/year on the line.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-49 is the target here specifically.