Rob,
They say the only bad questions are the ones you never ask
1.Roof, one method is to create a custom profile of a section of the type of roof in your example.
The custom profile will not give you the corrugation. I would check out the add-on
Objective. It is free for students, as are all add-ons. Just saw that there is an update to Objective in /viewtopic.php?t=19658]this post.
2. For the corner stone their is a Quoin library part in the wall extras folder. I have the US library, it may be in a different place than the international one, set the library to Search to find it.
HTH[url=
http://archicad-talk.graphisoft.com
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"