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From: "C Cole"

I am getting ready to finish the top section of a gambrel type roof on my
shed. I want to place a ridge vent across the top peak. All the pictures I
see of this type vent system shows the vent ending short of the edge of the
roof, and the sheeting being cut out where the vent will cover. Can I just
start laying the top sheeting 3" down from the peak and place the vent all
the way to the edge of the roof? This would let me use 3" less plywood on
each side of the roof sheeting, not have to cut it out after nailing it all
down. Is there a reason to not run the vent all the way over to the edge of
the roof line? Will it leak on the ends if installed this way? Does the roof
vent sections come with the ends capped off so they will not leak from the
ends?
Any information is appreciated. I will complete covering the top of the shed
roof this week. The shed is 12X20
Thanks in advance
C Cole

I think the ridge vent stops before the ends of the ridge because asthetically,
what you'd end up with would look a little funky.

As long as you cap the ridge along it's entirety, there's no reason not to
continue it to the end.