Select the original soffit and edit the sketch.
Gable end roof in revit.
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 a roof by extrusion draw sketch lines at the gable end specify depth of roof equal to the overhang.
Remove the section of the sketch that involved the gable end of the roof make sure the boundaries remain as closed loops.
Change the slope angle of the roof.
Use sloped edges or a slope arrow on a roof to create sloped roof elements.
When using a newer software release you may notice.
In this video i quickly copied the first floor studs and top plates to the second floor level.
How to model a sloped soffit for a gable roof in revit.
Use a slope arrow to define the slope.
Here is a little known method that can be used to create a soffit that follows the falls of the gable roof or similar.
This video demonstrates the following.
Define a sloped edge to a sketch line.
This video was recorded using revit 2012.
Last i added a gable roof into the model.
Create a separate compund roof that contains the soffit material at the bottom side and place it where the main roof stops at the wall plane then use join geometry to join the main roof and the overhang roof.