Mayagüez Municipio, PR Insulation Payback
Is attic insulation worth it in Mayagüez Municipio, PR?
Mayagüez Municipio sits in IECC climate zone 1 (Hot-Humid) — humid heat for much of the year, with cooling running far more than heating ever does. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-30. For an attic around 1,000 square feet, closing the gap from R-2 to R-30 costs around $1,680 and saves an estimated $845 a year — payback in roughly 2 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $0/year of that and cooling about $845/year — Mayagüez Municipio needs both. Nationally, Mayagüez Municipio ranks in the 6th percentile for insulation savings potential. Compared only against its own climate zone, Mayagüez Municipio places 13th out of 81. Against Puerto Rico's own average of $660/year, Mayagüez Municipio runs 28% above that.
Where these numbers come from
NOAA's MONA ISLAND 2, PR RQ station, 3.8 miles from Mayagüez Municipio, supplies the 0 HDD and 5,447 CDD this estimate runs on. That combined heating-and-cooling load ranks Mayagüez Municipio 1942nd nationally by total degree days — the 39th 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.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-25 runs about $840 for about $92/year saved — roughly 9.1 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Mayagüez Municipio 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 Mayagüez Municipio's estimated $845/year on the line.
Mayagüez Municipio's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Mayagüez Municipio'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.