This tool is located in the modify tab.
Revit irregular roofs.
To do this method you need to select the roof and edit the roof footprint.
To create a dormer model required walls and additional roof.
Mass are quite easy to make but using this method might be require a lot of works.
The roof however stayed rectangular.
See hd version of video tutorial here.
Then follow these 2 steps.
Creating complex sloping roofs in revit 2014 roof junctions controlling roof slopes and levels.
Learn the basic modeling for 18 different roof types and variations.
Use join unjoin roof tool.
If your design is quite simple you will not want to spend to much time on your roof.
I started out with a rectangular building design.
Creating a roof with different eave heights you can create a roof with slope defined lines at different elevations by joining 2 separate roofs.
I then sketched the roof profile and extruded it.
I then angled one of the walls in plan view as shown on the floor plan.
Changing slope angle and using slope arrow.
Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Revit roof tutorial and free file download.
I will not discuss much about this for now.
Download the working file for free to see mo.
Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
I wanted to create an irregular skillion sloped roof see attached image.