I have the unfortunate task of creating a concave roof in Revit 2010 that is not only concave, that I can do, but also rises from say 10' on the low side to 14' on the high side. I have tried to use the extrude roof tool, but it won't let me pick an angled face to create the extrusion. I built an angled box for just that purpose to give me the upward angle I am looking for.
I have attached a sketchup model showing the desired result.
Any help would be greatly appreciated.