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