CQs come in a standard pitch of 5 3/4, which will fit any roof you can safely walk unless its really flat or very slightly sloped. So if you can walk it, order a standard unit. But if its really steep, like over 9 pitch, you shouldnt be trying to walk that one and you need to order a custom cut one. And use a pro to put them on because toe boards should be used for these higher pitches. Also remember no matter what pitch, be careful up there and use a good ladder. Nothing on your roof is worth an injury.