I agree with Lakesrider. We resolved our ice dam problems by having a contractor re-insulate the area underneath the part of the roof where the problems were occurring.
Besides adequate insulation, you also need enough space between the insulation and the roof sheathing for outside air to circulate through the soffet vents and under the roof. The air in that space needs to stay cool.
Is this your first winter in a new house, or a house that you've spent many winters in and this is the first time this problem has happened?
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