East Baton Rouge Parish, LA Insulation Payback
East Baton Rouge Parish attic insulation, by the numbers
DOE classifies East Baton Rouge Parish as climate zone 2, hot-humid — humid heat for much of the year, with cooling running far more than heating ever does. 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 $856 a year — payback in roughly 3.3 years.
Topping up the attic pays for itself here.
Where the savings come from
Split it out and it's roughly $407 a year on the heating side, $449 on cooling. By estimated insulation savings, East Baton Rouge Parish lands in the 7th percentile nationally. Zone 2 alone covers 233 counties in this dataset, and East Baton Rouge Parish comes in 104th by savings. Louisiana averages $906/year across the counties tracked here; East Baton Rouge Parish comes in 6% lower.
Where these numbers come from
East Baton Rouge Parish's climate figures — 1,534 heating and 2,818 cooling degree days a year — are read from Baton Rouge Ryan AP, LA US, 3.2 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks East Baton Rouge Parish 2929th nationally by total degree days — the 8th percentile. One local detail the R-value alone won't tell you: East Baton Rouge Parish sits in moisture regime A (humid), which can affect the vapor-barrier choice.
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 $115/year saved (~14-year payback). Call this borderline rather than a clear win.
Next steps for a East Baton Rouge Parish attic
Get quotes from at least two local contractors 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 checking upfront given East Baton Rouge Parish's estimated $856/year on the line.
Where these figures come from
East Baton Rouge Parish's R-49 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-49 is the target here specifically.