Hatillo Municipio, PR Insulation Payback
Is attic insulation worth it in Hatillo Municipio, PR?
Hatillo Municipio, Puerto Rico is zone 1 under DOE's climate map (Hot-Humid), which means humid heat for much of the year, with cooling running far more than heating ever does. An uninsulated attic there should be built up to R-30. Going from R-2 to the recommended R-30 costs roughly $1,680 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 3.3 years at an estimated $505/year saved. That is a solid payback as home upgrades go.
Heating vs. cooling in Hatillo Municipio
Heating accounts for about $1/year of that and cooling about $504/year — Hatillo Municipio needs both. Nationally, Hatillo Municipio ranks in the 1th percentile for insulation savings potential. Compared only against its own climate zone, Hatillo Municipio places 63rd out of 81. Against Puerto Rico's own average of $660/year, Hatillo Municipio runs 23% below that.
The climate data behind this
The heating and cooling degree days behind this estimate — 3 HDD and 3,253 CDD (base 65°F, 1991-2020 normals) — come from ARECIBO OBSY, PR RQ, the nearest NOAA station with published normals, 7 miles from Hatillo Municipio's center. That combined heating-and-cooling load ranks Hatillo Municipio 3137th nationally by total degree days — the 1th 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
A shallower starting point changes the math: with R-11 already down, only the gap to R-25 needs filling, at roughly $840 for an estimated $55/year saved (~15.2-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Hatillo Municipio
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $1,680 figure above as a planning number for Hatillo Municipio, not a bid - contractors typically charge a $600 minimum regardless of job size.
Hatillo Municipio's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Hatillo 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.