Getting ready to retrofit an old house with insulation. The attatched drawing is almost identical to what I'm dealing with. Roof with absolutely no overhang and therefor no soffit vents. (not a fan of this roof. I prefer roofs with 2+ foot overhangs. Keeps your siding and windows out of the elements, water away from your foundation.)
My question is the vent channel. Doesn't look to be connected to any "intake air". Can I install foam vent channel that's sealed off at the top and bottom? My main concern is ice dams. I want to keep the roof cold.