I’m confused as to whether I should vent the gable portion of the roof on my house. Upstairs are 2 bedrooms  w/ kneewall closets under the gable  and collar ties at the top of the gable.     I believe when I tore off the old siding etc that the soffits were plywood w/ no vents, although there is a gable vent on each end of the house.  I don’t see any signs of moisture damage.   I added the porch and false rafter tails to meet the old gable roof and did not vent any of that as I thought it was un-necessary.    The rooms upstairs are cold and drafty in winter and hot in summer.   Should I treat this gable roof like a cathedral ceiling and fill the bays w/ insulation and then finish off the inside of the kneewall closets to make them as airtight as possible?  Should I vent,insulate and then finish the closets in the same manner?  If I do vent the gable roof should I also vent the porch roof  ans soffits formed by the false rafter tails?  Yikes!  My next house will be a rancher.  Thanks in advance. P.S I’m computer stupid so if may attachment doesn’t work you can see a picture of the house at message #40632.1.  Also I live in NJ wher we have pretty good temp extremes if that matters.     Dave Crawford