today I was up blowing the junk from my valley and noticed that you can actually pick up the one side of the shingles along the valley.
I noticed this before too but forgot to ask. Its like the shingles are all cut down thru the valley to form a perfect straight line but the one side is just kinda laying on the other side like its not nailed close to the valley.
Should I run a bead of roof cement down the lenght of that side just under the edge or leave it alone ?
I dont want to trap any water in either…