So, Like everyone else in MN, I have a ton of snow on my roof. This is only my third winter in the house, so it’s the first time I’ve seen the ice dams that form at the bottom of my valleys. I noticed a bit of peeling ceiling paint in the corner room, so I went into the attic to see what was happening. I expected something related to the ice dams, but where I found moisture was a place that there is no dam and no way for water to migrate there. It was literally on the gable and the roof deck adjacent to it. I went back outside and all I could find was that the shingles seem to be detached from the drip edge there. The gap is very small, maybe a quarter of an inch. It extends for about a foot or two. The rain/slush may have been driving from that direction over the weekend. Could rain have driven under the shingles at the top of the gable? Should this gap be sealed, and if so with what?
Any advice would be appreciated. It seems like if it were hot, the shingles might soften, lay flat, and adhere to the drip edge. But its a north facing roof there.