Use join unjoin roof tool.
Revit irregular roofs.
Please like this video.
You can use slope arrows to create slopes on a roof.
Revit roof tool set lets you add soffits fascia and gutters to an existing roof by picking the roof edge line.
I then sketched the roof profile and extruded it.
I wanted to create an irregular skillion sloped roof see attached image.
9 join roofs add opening to create dormer.
To create a dormer model required walls and additional roof.
Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
This tool is located in the modify tab.
I started out with a rectangular building design.
The roof however stayed rectangular.
Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Use slope arrows to define slopes on a roof such as a 4 sided gable roof.
I then angled one of the walls in plan view as shown on the floor plan.
For instructions see creating a sloped surface using a slope arrow.
Irregular double pitch roofs are also quite simple to create.