Building Enclosure

The system or assembly of components that provides environmental separation between the conditioned space and the exterior environment.

Note: The enclosure is a special type of environmental separator. Environmental separators also exist within buildings as dividers between spaces with different environmental conditions.

Related resources: BSD-018: The Building Enclosure, BSI-042: Historical Development of the Building Enclosure, BSI-061: The Function of Form—Building Shape and Energy


  • building envelope (outdated)