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.
How to make a dome roof in revit.
For the simple curved dome use the revolve and axis line tools.
First bring in a mass family from the library.
For the onion shaped dome start by using the model line tool to trace the shape from a photograph.
Autodesk revit out of the box has an array of different primitive shapes including dome.
2 for glazed domes.
Get this revit file here.
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.
For both domes create an in place family by choosing component model in place and then choosing roofs in the family category dialog box.
This video shows how to create two types of domes as in place roofs in revit.
For glazed domes based on curtain walls only the second does.