A few years ago I moved to Maryland (just outside the D.C. boarder) and have been working on converting an old chicken coop from the late 1930's, to be a nice little get-away in the back yard. I have come to the point where I need to think about how to insulate it (I am planning to put in a small heat-pump to cool/heat).
More to the point, whether or not to insulate the underside of the roof. The outside wall goes all the way to the roof boards, so no soffit, and no way to vent the underside of the roof after insulation ( could put a ridge vent in, but no air can make it up from the outside walls and run along the underside of the roof boards, to the ridge vent).
What should I do? Just fill up the space between the roof boards and the dry wall (That I will eventually put on there) with good insulation (as high of an R value as I can get) and just hope I don't get moisture under the boards?
Should I try and put in a ridge vent with some kind of "soffit" vent for each space?
Should I just not insulate or finish the roof, and live with the heat that will come when the summer moves in?
I have attached a picture to show how the roof is loosely constructed.