Have you tried a component schedule?
I have one 'does it all' schedule that I use for my cost calculation where I extract all kinds of measurements from my models. It sorts by building material and one of the fields I have there is skin thickness.
As to showing only walls, composites etc, I would say this is a matter of setting up enough filters to sort out to what you like. It's all pretty versatile.
Erwin Edel, Project Lead, Leloup Architecten
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