hi folks, in a follow up to my shed building woes...
i'm building a 10x15 shed outside. 2x4 walls, 16in on center...
ready to start sheathing (osb, was planning on doing 1/2in) do i nail
or screw sheathing in? I have a nail gun, but part of me thinks it
should be screwed in... what kind of screws if so?

Thanks!