Salinas Municipio, PR Insulation Payback
Attic insulation payback for Salinas Municipio, PR
DOE classifies Salinas Municipio as climate zone 1, hot-humid — long, muggy summers and mild winters, where cooling dominates the energy bill. Its recommended attic R-value for bare joists is R-30. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-30 runs an estimated $1,680, and saves about $757 a year in heating and cooling — a payback around 2.2 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $0/year comes from reduced heating and $757/year from reduced cooling load through the ceiling. Salinas Municipio beats 3% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 81 counties DOE places in zone 1, Salinas Municipio ranks 29th. Against Puerto Rico's own average of $660/year, Salinas Municipio runs 15% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 0 HDD and 4,884 CDD (base 65°F, 1991-2020 normals) — come from AGUIRRE, PR RQ, the nearest NOAA station with published normals, 2.9 miles from Salinas Municipio's center. Combined heating and cooling load puts Salinas Municipio in the 22th percentile of this 3,162-county dataset. DOE also classifies Salinas Municipio as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $83/year saved (~10.2-year payback). It is close - the payback only just fits a reasonable timeframe.
Next steps for a Salinas Municipio attic
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 Salinas Municipio, not a bid - contractors typically charge a $600 minimum regardless of job size.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.