Sketch or pick a closed loop for the roof.
How to add overhang after roof revit.
Now the next step is to select the linework tool from the modify tab view panel.
Then select the line style you want.
Specify slope defining lines.
Activate overhang on picked walls roof this is part of the revit pure basics package.
On the draw panel click pick walls.
Check out the full thing.
Click architecture tab work plane panel ref plane.
Create roof lines with an overhang.
Two options for the overhang when you create a roof in revit using the select walls tool in the options bar you will see an option with a checkbox see the left red colored arrow in the image below.
Reference plane in plan view.
Understand your roof options.
When a dashed line is displayed on the exterior of the wall click to place the roof line.
On the options bar select extend to wall core if you want the overhang to be measured from the core of the wall and then specify a value for overhang.
In the drawing area sketch a reference plane that is not perpendicular to the roof ridges.
On the options bar for overhang enter 3 and clear defines slope.
Open the 3d view.
In the drawing area highlight the west wall.
Learn how to troubleshoot your roof overhang or offset issues to make better more precise roofs with autodesk revit.