Create roofs on any non-vertical faces of a mass using the Roof by Face tool.
You cannot select faces from different masses for the same roof.
Note: Roofs created using the Roof by Face tool do not automatically update if you change the mass face.
To create a roof from mass faces
- Open a view that displays the mass.
- Click Massing & Site tab
Model by Face panel![](../images/ac.menuaro.gif)
(Roof by Face).
- In the Type Selector, select a roof type.
- (Optional) On the Options Bar, specify the level of the roof.
- (Optional) To create the roof from a single mass face, click Modify | Place Roof by Face tab
Multiple Selection panel![](../images/ac.menuaro.gif)
(Select Multiple) to disable it. (It is enabled by default.)
- Move the cursor to highlight a face.
- Click to select the face.
If the Select Multiple option is cleared, a roof is placed on the face immediately.
Tip: You can change the pick face location of the roof (either top or bottom) by modifying the roof’s Picked Faces Location property in the Properties palette.
- If Select Multiple is enabled, select more mass faces as follows:
- Click an unselected face to add it to the selection. Click a selected face to remove it.
The cursor indicates whether you are adding (+) or removing (–) a face.
- To clear the selection and start over, click Modify | Place Roof by Face tab
Multiple Selection panel![](../images/ac.menuaro.gif)
(Clear Selection).
- When the desired faces are selected, click Modify | Place Roof by Face tab
Multiple Selection panel
Create Roof.
Tips
- Do not select upward-pointing and downward-pointing faces for the same roof.
- To make roof panels that cover both upward and downward faces, split the mass into 2 faces, so that each face is either completely upward or downward. Then create one or more roofs from the downward faces and one or more from the upward faces.
Examples
![](../images/GUID-25D05042-40AE-4245-9A37-FB7AC3AA220F.png)
Cursor highlighting cylindrical face
![](../images/GUID-D8860D21-4D8F-40BB-818D-8DABFF63A8C9.png)
Placed roof