Fajardo Municipio, PR Insulation Payback
Attic insulation payback for Fajardo Municipio, PR
Fajardo Municipio, Puerto Rico is zone 1 under DOE's climate map (Hot-Humid), which means long, muggy summers and mild winters, where cooling dominates the energy bill. 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 1.9 years at an estimated $877/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 $877/year from reduced cooling load through the ceiling. Fajardo Municipio beats 8% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 81 counties DOE places in zone 1, Fajardo Municipio ranks 10th. Against Puerto Rico's own average of $660/year, Fajardo Municipio runs 33% above that.
Where these numbers come from
NOAA's ROOSEVELT ROADS, PR RQ station, 9.7 miles from Fajardo Municipio, supplies the 0 HDD and 5,657 CDD this estimate runs on. That combined heating-and-cooling load ranks Fajardo Municipio 1784th nationally by total degree days — the 44th percentile. DOE also classifies Fajardo 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
Already have a few inches up there? Topping R-11 up to R-25 runs about $840 for about $96/year saved — roughly 8.8 years to break even. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Fajardo Municipio attic
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 Fajardo 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.