Then follow these 2 steps.
Ghost 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.
You need to create the bay window roof separately.
Jpeg cad and revit files to assist in specifying and building with bristile roofing.
Use join unjoin roof tool.
Edit the roof sketch double click the roof or select the roof and click modify roofs tabmode panel edit footprint or edit profile.
See hd version of video tutorial here.
Use it to extend the dormer roof to the main roof.
Please like this video.
Colours and range included.
But i m not really sure if this is a best practice.
Welcome to my channel i create videos and tutorials for architects.
9 join roofs add opening to create dormer.
Https youtu be pl5jqj8btfc wall layers in revit tutorial.
I believe this tools are not design for this purpose.
This is the easiest way to do it.
Roof construction in revit.
This tool is located in the modify tab.
If you want to change the position of the roof use the properties palette to edit the base level and offset properties to change the position.
After creating a roof you can change its shape or overhang cut openings or align ridges.
Bristile roofing bim library.
To create a dormer model required walls and additional roof.