Vernon Parish, LA Insulation Payback
Is attic insulation worth it in Vernon Parish, LA?
DOE classifies Vernon Parish as climate zone 3, 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 $923 a year — payback in roughly 3.1 years. That is a solid payback as home upgrades go.
Where the savings come from
Heating accounts for about $532/year of that and cooling about $391/year — Vernon Parish needs both. Nationally, Vernon Parish ranks in the 11th percentile for insulation savings potential. Compared only against its own climate zone, Vernon Parish places 620th out of 690. Against Louisiana's own average of $906/year, Vernon Parish runs 2% above that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,004 HDD and 2,453 CDD (base 65°F, 1991-2020 normals) — come from LEESVILLE, LA US, the nearest NOAA station with published normals, 4.1 miles from Vernon Parish's center. By total degree days, Vernon Parish sits at the 10th percentile nationally. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
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 $124/year saved (~13-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Vernon Parish
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 Vernon Parish job, not a quote. Expect at least a $600 minimum charge from most contractors.
Vernon Parish's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Vernon Parish's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.