I wanted to create an irregular skillion sloped roof see attached image.
Revit irregular roofs.
I started out with a rectangular building design.
For instructions see creating a sloped surface using a slope arrow.
You can use slope arrows to create slopes on a roof.
Keeping in mind the steps taken in the examples above draw walls and create roof by footprint at the relevant level.
I then sketched the roof profile and extruded it.
To create a dormer model required walls and additional roof.
I then angled one of the walls in plan view as shown on the floor plan.
Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
Use slope arrows to define slopes on a roof such as a 4 sided gable roof.
Use join unjoin roof tool.
Use it to extend the dormer roof to the main roof.
Please like this video.
Irregular double pitch roofs are also quite simple to create.
This tool is located in the modify tab.
Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Then follow these 2 steps.