Insulation touch roof deck – GreenBuildingAdvisor

Hello,

I’m in michigan and working on insulating my attic. My attic has no soffit vents (and no way to add them). It has gable vents and slant back vents. My upstairs has a knee wall. I need to add 18 inches of blown in insulation. I currently have 2 inches. I have been working on air sealing and am almost ready to do blown in. Since I have no soffit vents can I blow insulation so that it touches the roof deck in the slanted section? If I can would it matter as far as cellulose or fiberglass touching the bottom of the roof deck? My slanted portion of my knee wall is only about a 12 inch stretch. If I had 2×6 rafters and joists I would probably just add the baffles, but since I only have 2×4 rafters and joists the baffles would only allow me to have a couple inches of insulation. I attached a drawing to hopefully clarify. Thank you