Arizona Building Climate Zone
Arizona ranges from hot dry Zone 2 to colder high-elevation zones. State-level climate-zone pages are planning baselines; IECC climate zones are county based.
Planning baseline
- IECC climate zone: Zone 2B
- Climate type: Hot
- Wall planning target: R-13 or R-0 + R-10 continuous insulation
- Attic planning target: R-49 to R-60
- Floor planning target: R-13