Cidra Municipio, PR Insulation Payback
Is attic insulation worth it in Cidra Municipio, PR?
Cidra 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. 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 4.3 years at an estimated $395/year saved. That is a solid payback as home upgrades go.
Where the savings come from
Heating accounts for about $7/year of that and cooling about $388/year — Cidra Municipio needs both. Nationally, Cidra Municipio ranks in the 0th percentile for insulation savings potential. Compared only against its own climate zone, Cidra Municipio places 67th out of 81. Against Puerto Rico's own average of $660/year, Cidra Municipio runs 40% below that.
Where these numbers come from
Cidra Municipio's climate figures — 27 heating and 2,502 cooling degree days a year — are read from AIBONITO 1 S, PR RQ, 7.5 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Cidra Municipio 3147th nationally by total degree days — the 0th percentile. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-25 runs about $840 for about $43/year saved — roughly 19.5 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Cidra 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 Cidra Municipio job, not a quote. Expect at least a $600 minimum charge from most contractors.
Cidra Municipio's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Cidra Municipio's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.