What is Unenclosed Covered Area (UCA)?

Unenclosed Covered Area (UCA) refers to any part of a building that is roofed but not fully enclosed by walls. These spaces are sheltered from the weather yet remain open to the outside, such as verandas, balconies, carports, covered walkways, or open-sided loading bays. UCA is used in building measurement standards to distinguish semi-outdoor, partially enclosed spaces from fully internal areas, helping assess functionality, compliance, and overall building area calculations.