Add Roof Modifier

The Add Roof Modifier tool allows you to use 2D objects to trim and make holes in roofs.

The 2D objects must be closed, and must be on the workplane, not on the roof planes.

To add a roof modifier. 

1. Click on the roof to select it.
2. Click on the object you wish to act as a modifier.
3. Repeat steps 1-2 for each modifier you wish to add.

The modifier remains associative to the roof. Moving it or modifying it will be reflected onto the roof.