In the option bar make sure defines slope is activated for boundary lines.
Revit roof secrets.
Once again select the wall first 1.
To turn a sloped roof into a flat roof select all roof boundaries purple lines and uncheck defines slope in the option bar.
Discover free revit bim objects for roofs.
This is the easiest way to do it.
See hd version of video tutorial here.
Please like this video.
But i m not really sure if this is a best practice.
For creating complex roof it might be easier if you create separate roof then use join roof tool to join them later.
Roof by footprint can be used for both flat and sloped pitched roofs.
Download manufacturer approved bim content for roofs.
2 activate slope to create a sloped roof want to create a sloped roof.
Then choose attach top base 2 and finally select the roof 3.
You need to create the bay window roof separately.
I believe this tools are not design for this purpose.