I got a question on how to show the roofing material in plan view. If you want to achieve the result showed at the lower image to the right here is one way.
Select the roof, right click and select Edit Object Display.
On the Materials tab click on the Add New Material button and add "Standing Seam" or whatever you want to name it.
Click on the Edit Material button.
Click on the current display representation in the Style Override column.
On the Layer/Color/Linetype tab make the Display Component "Surface Hatch" visible.
On the Hatching tab set appropriate pattern for the Surface Hatch Display Component.
On the Other tab make sure Top is selected on Surface Hatch Placement.
In Display Manager edit the current Configuration and the Plan View Direction.
On the Display Representation Control find the Roof object and make sure the Model Display Representation is checked.
Find also the Plan Set and in Display Representation Control find the Roof object and make sure the Model Display Representation is checked.
I used AutoCAD Architecture 2008 in this example. If you have a better way or another way please share it in the comments.