The thickness of aluminum sheets commonly used for carports or garages typically ranges from 0.022 to 0.032 inches (0.56 to 0.81 mm). This range provides a balance between strength and cost-effectiveness. Thicker sheets offer greater durability and resistance to weathering, while thinner sheets are more affordable but may require more maintenance over time. The specific thickness chosen often depends on the design requirements, local weather conditions, and the intended lifespan of the structure.