Naguabo Municipio, PR Insulation Payback
Attic insulation payback for Naguabo Municipio, PR
Naguabo Municipio sits in IECC climate zone 1 (Hot-Humid) — long, muggy summers and mild winters, where cooling dominates the energy bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $166 a year in heating and cooling — a payback around 10.1 years. Call this borderline rather than a clear win.
Where the savings come from
Of that, about $96/year comes from reduced heating and $70/year from reduced cooling load through the ceiling. Naguabo Municipio beats 0% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 81 counties DOE places in zone 1, Naguabo Municipio ranks 80th. Against Puerto Rico's own average of $660/year, Naguabo Municipio runs 75% below that.
Naguabo Municipio's actual weather, not a national average
NOAA's PICO DEL ESTE, PR RQ station, 4.4 miles from Naguabo Municipio, supplies the 372 HDD and 451 CDD this estimate runs on. By total degree days, Naguabo Municipio sits at the 0th percentile nationally. DOE also classifies Naguabo 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 $18/year saved (~46.4-year payback). The payback here is longer than the analysis horizon.
Getting it done in Naguabo Municipio
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 Naguabo 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. If Naguabo Municipio's own payback reads slow, the state rebate guide covers funding that could change that math.