Cutting hole in Roof

[profcad]

I can't seem to cut out the roof where the walls of the 2nd floor extrude up past the roof.

what is the best way to accomplish this. See below. The red line indicates where I want to cut the roof

http://www.occc.edu/jhelton/cadtutor/roofbefore.png
http://www.occc.edu/jhelton/cadtutor/roofafter.png

[qbi]

I think You have two ways

1st. Go to Modify----> openieng---->opening by face, mark roof draw the lines and finnish

2nd. Go to the family create an void extrusion ( with demand size) form Genreric face based family, load it into the project and add to the roof.

[ruchiarch]

Its better to follow :

Modeling - Creat family - void - extrusion

[ARCHdoc]

Yiu could also use a shaft opening

[boofredlay]

Use the Vertical Opening.
This is how it looks in 2009.

[profcad]

Thanks for all the help. The vertical opening worked great.