Bayamón Municipio, PR Insulation Payback
Attic insulation payback for Bayamón Municipio, PR
Bayamón 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 2 years at an estimated $821/year saved. Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $0/year comes from reduced heating and $821/year from reduced cooling load through the ceiling. Bayamón Municipio beats 5% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 81 counties DOE places in zone 1, Bayamón Municipio ranks 16th. Against Puerto Rico's own average of $660/year, Bayamón Municipio runs 24% above that.
Where these numbers come from
Bayamón Municipio's climate figures — 0 heating and 5,296 cooling degree days a year — are read from TOA BAJA LEVITTOWN, PR RQ, 6 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Bayamón Municipio sits at the 34th percentile nationally. DOE also classifies Bayamón Municipio as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
If the attic isn't bare
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 $90/year saved (~9.4-year payback). It is close - the payback only just fits a reasonable timeframe.
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 $1,680 as a starting estimate for a Bayamón Municipio job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.