We have section of the house that get serious ice dams. The roof in that attic is not insulated. There's also no vents. I created some vents this week at the soffit (half dozen 2" holes) that go into the attic. There's a single window near the apex, but no vents. And there are no soffit vents on the other side. I'm thinking of venting the other side. But ... what else? Do I run styro channels all the way up the roof and "over" to the new vent? Do I then pack insulation on top of the channels? Or, so I just need to ensure that the 2" holes can flow freely into the room and then install a new vent over the window and then also install insulation on the roof? I have no ridge vent. I'm looking forward to your input! Thanks!