I've built a patio cover onto the side of my house. Using asphalt
shingles. I have put flashing under the siding of the house. My
question is(I have rolled felt under the flashing on the patio cover),
do I nail a layer of shingles on top of the flashing, or just under?
To nail on top would pierce the flashing. The flashing does not lay
flush onto the patio cover and I dont like it exposed. What is the
appropriate course of action?