Tensas Parish, LA Insulation Payback
Is attic insulation worth it in Tensas Parish, LA?
Tensas Parish sits in IECC climate zone 3 (Hot-Humid) — summers that stay hot and humid while winters barely register on the energy bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.9 years at an estimated $958/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $576/year of that and cooling about $382/year — Tensas Parish needs both. Nationally, Tensas Parish ranks in the 14th percentile for insulation savings potential. Compared only against its own climate zone, Tensas Parish places 558th out of 690. Against Louisiana's own average of $906/year, Tensas Parish runs 6% above that.
Where these numbers come from
NOAA's ST JOSEPH 3 N, LA US station, 7.3 miles from Tensas Parish, supplies the 2,171 HDD and 2,398 CDD this estimate runs on. That combined heating-and-cooling load ranks Tensas Parish 2749th nationally by total degree days — the 13th percentile. 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.
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 $129/year saved (~12.6-year payback). Whether that is worth it depends on how long you plan to stay.
Quotes and materials for this job
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 Tensas Parish job, not a quote. Expect at least a $600 minimum charge from most contractors.
Tensas Parish's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Tensas 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.