Quote:
Originally Posted by Nyah
Just in this corner. It is an intersection, and the roof slopes down at that seam.
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Normally, there should be some underlayment at the valley between the two roof slopes. I have seen installations where it wasn't used. They may have not installed underlayment (or better yet - self adhered ice and water sheild), at the valley.
Anyway, for now, just get up on the roof and remove the snow from the valley. If there is a build up of ice under the snow covered area at the valley, there is a good possibility that it is an ice damming issue. After you have cleared the snow off of it, use some de-icer on it and melt the ice.