Use join unjoin roof tool.
Revit join roof planes.
Structure tab work plane panel reference plane systems tab work plane panel reference plane family editor.
Click modify tab geometry panel join unjoin roof.
Learn revit hotkeys and commands with the revit shortcut keyboard guide to help you work faster and be more efficient while using revit software.
Please like this video.
The steps to model a roof by extrusion in revit are as follows.
In the drawing area draw the reference planes by dragging the cursor.
To do this go to architecture tab roof dropdown roof by extrusion once you are in roof by extrusion a dialogue window will open.
Use it to extend the dormer roof to the main roof.
Create tab datum panel reference plane conceptual design environment.
This method is worth learning so when plane moves everything goes with it.
9 join roofs add opening to create dormer.
Reference plane creates a reference plane using drawing tools.
Then follow these 2 steps.
Select an edge of the roof that you want to join and then select the wall or roof to which you want to join the roof.
Choose ok to accept default parameters and generate the roof shown.
To create a dormer model required walls and additional roof.
On the draw panel click line.
Go to end view of roof elevation face on to new named ref plane select roof by extrusion the select new named ref plane from drop box.
Window places a window in a wall or skylight in a roof.
In the pop up menu then choose calif ranch from the roof style pull down menu.
Create tab draw panel reference plane to draw a line.
First we need to navigate to the roof by extrusion tool.
Choose plugins instant roof make roof.