Boca's roofs run hot
Under Boca Raton's zone 1A sun, a tile or flat roof can push attic temperatures past 130°F. If your attic is under-insulated — and most East Boca homes built before the 2000s are, often sitting at R-11 to R-19 — that heat radiates straight down into your ceilings and your AC never catches up.
What a Boca attic system looks like
We air seal the ceiling plane first, insulate and seal the ductwork, add baffles to keep soffit vents clear, then blow fiberglass to a settled R-38 to R-49 — the zone 1A target for Palm Beach County. On sealed-attic homes we spray the roof deck instead.
Older homes and newer homes, different fixes
An older East Boca ranch usually needs removal of thin, dusty batts and a full re-insulation. A newer west Boca two-story often just needs air sealing and a top-up over the existing blown-in. We scope each one on its own.
Insulation costs in Boca Raton
Installed pricing depends on square footage, target R-value, attic access, roof type, and whether old material has to come out first. Here is where installed pricing generally lands in Palm Beach County — and we itemize every quote so you can compare honestly.
| Material | Installed cost | R-value / inch | Service life |
|---|---|---|---|
| Blown-in fiberglass | $1.10–$2.00/sq ft | R-2.2–R-2.7 | 20–30 yrs |
| Fiberglass batts | $0.90–$2.10/sq ft | R-3.1–R-4.3 | 25+ yrs |
| Open-cell spray foam | $1.50–$3.20/sq ft | R-3.6–R-3.8 | 80+ yrs |
| Closed-cell spray foam | $2.40–$4.90/sq ft | R-6.0–R-7.0 | 80+ yrs |
| Insulation removal | $1.10–$2.90/sq ft | — | One-time |
Boca Raton is in Palm Beach County — IECC climate zone 1A, the hottest zone in the continental U.S. The recommended attic target here is R-38 to R-49, roughly 12 to 15.5 inches of blown fiberglass at settled depth. Many older East Boca homes still sit at R-11 to R-19 under a hot tile or flat roof.
Attic Insulation FAQs for Boca Raton
How much attic insulation does a Boca Raton home need?
Zone 1A calls for about R-38 to R-49 in the attic — roughly 12 to 15.5 inches of blown fiberglass. Many older Boca homes are far below that.
How much does attic insulation cost in Boca Raton?
Most Boca attic projects land between $1.10 and $2.10 per square foot installed depending on R-value, access, and whether old material is removed first.
Will new attic insulation lower my Boca electric bill?
Almost always. Cooling is the biggest slice of a Palm Beach County power bill, and a right-sized attic is the highest-return step to cut it.