First a work plane needs to be decided upon.
How to make a dormer roof in revit.
To create a dormer roof we first need to start with the smaller roof portion of the dormer.
This tool is located in the modify tab.
Use it to extend the dormer roof to the main roof.
Create the walls and roof elements that make up the dormer.
The pick roof wall edges tool is active so that you can pick the boundaries that compose the dormer opening.
Structure tab opening panel dormer opening highlight the main roof on the building model and click to select it.
How to model a dormer roof in revit.
Watch the status bar to be sure that you are highlighting the main roof.
Select the wall type and constraints for a dormer that will be added to a roof.
This video was recorded using revit 2018.
Create the roof opening and finish the dormer.
Then follow these 2 steps.
Add a dormer to a roof and use the dormer opening tool to cut the opening for it.
You can model this in any of the 3 primary roof modelling methods but in the example i have opted to use the roof by extrusion tool.
To create a dormer model required walls and additional roof.
Move the walls to the dormer.
After adding a dormer cut an opening for it through the roof.
Place the cursor in the drawing area.
9 join roofs add opening to create dormer.
This video demonstrates the following.
Use the join roof tool to join the dormer roof to the primary roof.
Create the dormer roof and join it to the main roof.