Create a void extrusion and make to required cut in the new construction phase apply the cut and done.
Revit joining exting and new roof.
1 unjoin the roof.
Click modify tab geometry panel join unjoin roof.
Use it to extend the dormer roof to the main roof.
2 create a reference plane 1 away from the edge of the second roof.
If necessary use the viewcube to spin the design to facilitate selecting the wall or roof edges.
How to join two roof aug 19 2013.
I have two roofs that i am trying to join.
3 edit the footprint of the unjoined roof.
Hope this is of assistance.
3 adjust wall join display in view properties.
4 copy the roof paste it in the same place.
It will place in the new construction phase.
To create a dormer model required walls and additional roof.
Join date august 9 2011 location louisville ky posts 6 388 current local time 06 22 pm.
If anyone is still looking for a solution you can make a roof cut into an existing roof using component model in place.
9 join roofs add opening to create dormer.
It consists of two gables.
You can only modify this setting if the detail level of the view is coarse this technique is useful if you have a lot of walls removing the tedious process of manually adjusting the join and boundary of each individual wall.
This tool is located in the modify tab.
Then follow these 2 steps.
Align one edge of the roof to the reference plane.
The eaves and type of cuts are the same but it still says they can t be joined.
This should keep you existing roof in tact and show a cut in the new construction phase.