Material |
Used in class CompoundStructure to specify the function of a layer.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)


Member name | Value | Description |
---|---|---|
Finish1 | 4 | Priority = 4 |
Finish2 | 5 | Priority = 5 |
Insulation | 3 | Priority = 3 |
Membrane | 100 | A membrane layer must have thickness 0. It is not represented graphically. |
None | 0 | Priority = 0 This is deprecated and should not be used. |
StructuralDeck | 200 | Indicates layer is a structural deck. |
Structure | 1 | Priority = 1 (highest priority) |
Substrate | 2 | Priority = 2 |

The function is used primarily to determine layer priority which affects how layers of distinct elements interact at a join. Typically, layers penetrate lower priority layers and merge with layers of the same priority.
