East Carroll Parish, LA Insulation Payback
East Carroll Parish attic insulation, by the numbers
East Carroll Parish, Louisiana is zone 3 under DOE's climate map (Mixed-Humid), which means a genuine mix of cold winters and humid summers, with neither one dominating the 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 $1,030 a year — payback in roughly 2.7 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $656 a year on the heating side, $374 on cooling. By estimated insulation savings, East Carroll Parish lands in the 19th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and East Carroll Parish comes in 408th by savings. Louisiana averages $906/year across the counties tracked here; East Carroll Parish comes in 14% higher.
The climate data behind this
The heating and cooling degree days behind this estimate — 2,474 HDD and 2,346 CDD (base 65°F, 1991-2020 normals) — come from LAKE PROVIDENCE, LA US, the nearest NOAA station with published normals, 6.4 miles from East Carroll Parish's center. Combined heating and cooling load puts East Carroll Parish in the 20th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: East Carroll Parish sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
If East Carroll Parish's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-38. That smaller top-up costs around $1,620 and saves an estimated $139/year — payback about 11.7 years. Call this borderline rather than a clear win.
Next steps for a East Carroll Parish attic
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 East Carroll Parish job, not a quote. Expect at least a $600 minimum charge from most contractors.
Where these figures come from
East Carroll 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.