When insulating a Florida attic, you'll typically choose between blown-in insulation (loose-fill fiberglass or cellulose) and batt insulation (pre-cut fiberglass blankets). For most Florida attics, blown-in is the clear winner.
**Blown-in fiberglass** fills every gap, crack, and irregular space in your attic — including around joists, wiring, and pipes. It achieves uniform coverage with no thermal bridging gaps, which is critical in Florida's intense heat. Installation is fast (1–3 hours), and settled R-values are stable over time.
**Batt insulation** is cut in standard widths and must be manually fitted around every obstruction. In older Florida homes with complex attic layouts, batts almost always leave gaps that severely reduce real-world performance. Batts are also more susceptible to moisture damage and compression.
The verdict: blown-in fiberglass is the preferred choice for Florida attic insulation. It performs better, installs faster, resists moisture better, and is typically the same price or cheaper per R-value than batt insulation. Florida Attics exclusively uses blown-in fiberglass for attic floor installations.