Originally Posted by federer
Grumpy if I may ask then- what about for the new types of roofing where they close off the soffits and ridge vents, spray foam the deck, and condition the attic space instead. then no ventilation is required, correct?
That's just another area in the house that will be conditioned, but will not be used. I would venture to say that your HVAC system wasn't sized to factor in this entirely new area.
Also, I would venture to say that the roof sheathing will be taking a beating.