I extended a piece of flashing on the side of a dormer. They didn’t use step flashing or turnback flashing. They used angle flashing and it looks like they sealed it with roofing cement. I just tucked the extension piece of flashing under the old flashing about 4 inches.
Do I need to seal under the shingles with roofing cement?
I wasn’t sure if I needed to or not. The bottom portion of the angle flashing is around 6 inches so water would have to travel that far horizontally to get past the flashing.
The problem area was the the bottom side of the dormer. They just cut the top portion of the flashing and nailed it to the stud. I am having a sheet metal shop fabricate me a corner flashing. How to professionals seal the ends. Keep in mind the end of the dormer is the siding of the house that goes all the way to the ground.
Any help would be appreciated.