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 2920th 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 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 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.