Can you locate exhaust venting in the middle of the roof? Can you cut a cross over in the cross blocks?
Given that it's a flat roof and I have no access, I don't think I'd do that.
Is there any insulation in this thin cathedral ceiling? Is there conditioned space below the plywood, or another attic space?
There is no insulation that I can tell. The space below has not been conditioned. It was a partially screened florida room with 16 foot sliders going into the house. It's now remodeled, totally enclosed and I'm hoping to remove the 16' sliders and open the space into the house.
I don't know if my ac unit can handle the additional 200 sqft. Nor do I know how much radiant heat I'll be getting into the room from this ceiling.