Draw your walls and then with the roof tool create a roof that will be used to trim the wall to the desired shapes.
If you use the trim-to-roof techinique you can delete the roofs.
If you use the solid elements operation technique put your roofs on a layer that can be turned off (SEO layer).
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"