Angled wall question

[benson1]

I am working on a project that has a wall sloping outward at 10degrees. I found an acceptable way to model the wall, but then when I create a room, the boundaries of the wall go vertically and don't fill the space over the wall. This is important for me because I was hoping to use the Revit model for use in IES<VE>. Does anyone know of a way to get Revit to recognize that area?
Thanks-

[Dimitri Harvalias]

Welcome to the forums.
Take a look at 'Computation Height' in the help file. This is a setting that affects where the cut plane for calculating areas is placed. It is a type property of the level datum.
You might have to fiddle with it a bit to get the correct level but it should do the job.