As an extrusion.
Revit 2018 trim extruded roof.
Note that you do not need to trim the sketch lines to have a valid boundary.
In this example side faces of walls and joined faces of the roof were selected.
For examples of basic roof shapes and a link to a sample revit model containing these examples see the roof sample file topic.
This video is part of a series that walks you through the process to model a house.
You cannot join a roof to more than one top face of another roof.
From a building footprint.
You can join a roof to the top face of another roof and the wall below that roof if you select the wall as the target.
In this video we will go through adding a roof by extrusion to our house.
You can use model in place when you want to cut system families like roofs or walls.
This is a general.
Revit completes the extrusion and returns you to the view in which you started the extrusion.
In the roof reference level and offset dialog select a value for level.
The wall must be attached to the target roof and the target roof must be a footprint roof.
To resize the extrusion in the 3d view select it and use grips to edit it.
Display an elevation 3d or section view.
Click modify create extrusion tab mode panel finish edit mode.
You can create a roof.
Choose the method that best meets the needs of your design.
To view the extrusion open a 3d view.
Valid boundaries are a joined roof or its bottom face a side face of a wall a bottom face of a floor an edge of the roof to be cut or a model line on the face of the roof to be cut.
You can join roofs to other roofs or walls or unjoin them if they were previously joined.
Revit offers several methods of creating roofs.
With sloped glazing.
Click architecture tab build panel roof drop down roof by extrusion.
Creates a roof by extruding a profile that you sketch.
The highest level in the project is selected by default.