Roof Composite trimming to a wall composite

[Anonymous]

I have a shed roof that runs into a wall. I am using a composite wall with stud-sheathing-siding and a composite for the roof that includes 2x8-sheathing-shingles. I want the sheathing to trim to each other and the shingles to trim to the siding. I have set the priority's
stud-sheathing-siding 10-8-6
2x8-sheathing-shingles 10-12-14
I have turned on the priority setting in the wall tool, I don't see an option for this in the roof tool.
I have also played around with fills using the same fill for the sheathing so that it would trim to each other. Still no luck. Hoping someone can help me with this. Am I missing something?
See image.
I appreciate any help you can give.

[TomWaltz]

Part of the reason I don't use roof composites... I've never been able to satisfactorily separate the skins on them.

[Anonymous]

Thanks Tom, what do you recommend for roofs if you don't use composites? Is it better to use the roof tool and draw multiple roofs on top of each other(one roof for the sheathing one for the shingles etc.). Or just draw the shingles, sheathing and soffit in as 2d lines?

[TomWaltz]

I use the roof tool to represent the sheathing.

The shingles are really too fine to model accurately (and too time consuming).