In the roof reference level and offset dialog select a value for level.
Roof by extrusion revit.
Within revit the roof by extrusuion tool is used in an elevatation or section view as opposed to the roof by footprint tool which is used in a plan view.
Elevation of section you can select a reference plane to sketch your profile on as long as you have a named one in your model.
In this project if you want to create an arched canopy on the west face of the building.
The roof by extrusion tool creates a roof by extruding a profile that you sketch.
The highest level in the project is selected by default.
To create a dormer model required walls and additional roof.
How to create a roof by extruding a profile.
So first of all let s go ahead and create our reference plan.
You sketch them in elevation and then apply extrusion lengths to them.
Specify the work plane.
They are ideal for roof shapes that are freeform barrel vaults or similar.
Use join unjoin roof tool.
Then follow these 2 steps.
9 join roofs add opening to create dormer.
Display an elevation 3d or section view.
This tool is located in the modify tab.
Use it to extend the dormer roof to the main roof.
Click architecture tabbuild panelroof drop down roof by extrusion.
Extrusion roofs offer an alternative way to create roof elements.
We also need to use a refrence plane upopn which we can sketch the side profile for our extrusion.