How do you install a drip edge on a pre-existing roof?
At the risk of hijacking this thread, I've got a similar problem. I inherited my mother's house a while back. There's an area where water drips down from the gutter when it rains. At first I thought it was just clogged up and water was spilling over the top of the gutter. But during a recent rain I noticed that the water was coming down from behind the gutter. (The fascia board has aluminum over it.)
Home Depot has something called a gutter skirt that should do the trick, but how do I hold it down? Is caulking or liquid nails enough, or do I need to nail it down?