We are around the back side of the building now select this tool in the geometry tab called join unjoin roof.
Join roofs revit.
Then click the green tick to finalise it now we can begin the process to join roofs in revit.
To join roofs create both roofs.
You should end up with another roof like this we are going to join these roofs together.
If the smaller of the roofs has been created using roof by footprint the joining edge must have the slope angle removed this can be accomplished by editing the roof footprint.
The wall must be attached to the target roof and the target roof must be a footprint roof.
The roofs can be created using either roof by extrusion or roof by footprint as shown in figure 1.
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.