IECC climate zone 1 on the US map (very hot climate)
Climate zone 1 (very hot) covers the southern tip of Florida and Hawaii. Your required insulation depends on this zone.
What this diagram shows
A simplified map of the United States with IECC climate zone 1 highlighted. Climate zone 1 is a very hot climate covering the southern tip of Florida and Hawaii. A legend names every zone from warm zone 1 in the south to cold zone 8 in the north; the colder the zone, the higher the insulation R-value the code requires. The figure lists example cities in zone 1 and the IECC minimum R-values for the attic, walls, and floor.
Related diagrams
Insulation & ClimateMap of the eight IECC climate zones across the United States
Insulation & ClimateWhy IECC climate zones are assigned by county, not by state or city
Insulation & ClimateIECC minimum attic and wall R-values across all eight climate zones
Insulation & ClimateWhat R-value means — the same R-30 takes very different thickness by material