Maunabo Municipio, PR Insulation Payback
Attic insulation payback for Maunabo Municipio, PR
Maunabo Municipio sits in IECC climate zone 1 (Hot-Humid) — humid heat for much of the year, with cooling running far more than heating ever does. 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 $924 a year in heating and cooling — a payback around 1.8 years. 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 $924/year from reduced cooling load through the ceiling. Maunabo Municipio beats 11% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 81 counties DOE places in zone 1, Maunabo Municipio ranks 5th. Against Puerto Rico's own average of $660/year, Maunabo Municipio runs 40% above that.
Where these numbers come from
NOAA's GUAYAMA 2E, PR RQ station, 12.6 miles from Maunabo Municipio, supplies the 0 HDD and 5,958 CDD this estimate runs on. Combined heating and cooling load puts Maunabo Municipio in the 51th percentile of this 3,162-county dataset. DOE also classifies Maunabo Municipio as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-25 runs about $840 for about $101/year saved — roughly 8.3 years to break even. It is close - the payback only just fits a reasonable timeframe.
Next steps for a Maunabo 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 Maunabo 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.