You need to create the bay window roof separately.
Revit roof convertin.
How to model a dutch gable roof in revit.
For creating complex roof it might be easier if you create separate roof then use join roof tool to join them later.
The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
But i m not really sure if this is a best practice.
Get these project files and all advanced 1h courses.
See hd version of video tutorial here.
Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
This is the easiest way to do it.
Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.
Convert a hosted family to face based or non hosted family this is a short excerpt from revit.
These elements will be hosted to the rhino geometry.
I believe this tools are not design for this purpose.
Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Depending on the base geometry revit may make editing the mass accessible via grips push pull arrows but this is not always the case.
Using shape editing tools.
The one thing to note when modelling a dutch gable roof in revit is to create an internal set of boundary lines to match the size of the higher level gable that will be above.
The dutch gable is a combination of a hip roof with a higher level gable roof both of which have been covered previously.
For more details on what you can copy and monitor in revit see about copy monitor.
However the best method to generate native revit elements from rhino is to use the wall by face roof by face curtain system and or mass floors commands.