First bring in a mass family from the library.
How to make a dome roof in revit.
For the onion shaped dome start by using the model line tool to trace the shape from a photograph.
After placing the mass an elevation view is needed to adjust the shape of the dome to the desired roof dimensions being careful not to make the roof too steep.
Autodesk revit out of the box has an array of different primitive shapes including dome.
This video shows how to create two types of domes as in place roofs in revit.
New conceptual mass draw the section open and draw a line for the axis.
Please like this video.
2 for glazed domes.
1 new family generic model from a front view create solid revolve draw the section select an axis finish load into project roof by face select faces finish roof.
For both domes create an in place family by choosing component model in place and then choosing roofs in the family category dialog box.
In this video i show you how to model two types.