9 join roofs add opening to create dormer.
Revit tapered roof.
You can use shape editing tools to manipulate the surface of a flat non sloped floor or roof by defining high and low points for drainage.
The standard tapered panel size is 4 x 4.
The first attachment shows how i normally do it with slope defining lines near the roof drain with the tapered insulation roof element either extended to the main roof or just sketched out that way.
Revit adjust drainage slope of flat roof duration.
Use it to extend the dormer roof to the main roof.
Revit tapered roof cricket with in place sweep blend cadclip duration.
The second attachment shows how it s actually constructed with 1 2 tapered boards.
To create a dormer model required walls and additional roof.
Technonicol plugin is a revit program add in that contains tools designed to create slopes on a flat roof using tapered insulation sandwich construction leaders as well as catalogs of building systems materials and sketch books of connections.
By specifying the elevation of these points you split the surface into sub regions that can slope independently.
I used 1 8 and 1 4 sloped pieces on a 1 4 sloped roof.
This tool is located in the modify tab.
Use join unjoin roof tool.
Then follow these 2 steps.