Overframed Roofs

[aforce]

How are overframed roofs generally detailed for ventilation and vapor retarding? I am designing a raftered roof system where two rooflines "tee" into each other. Do I have to ventilate the overframed space (attic?) These rafters have no option for incoming ventilation air except for openings cut in the sheathing as they terminate at an interior gable wall. This wall needs to be insulated and have a vapor barrier installed, correct?

Thanks in advance

[Dragon]

Ah, a layover.

Remove the decking on the existing roof so that the upper area isnt dead space and air can move.

And yes, that wall will need to be insulated.