We always apply i w before all flashing details as a temporary dry in procedure and second layer of defense against leaks.
Bay window roof flashing.
On the front of the bay a layer of shingles can cover the flashing if you need to hide it.
Issues with your counter flashing are normally the number one reason why a bay window can leak.
We would have used a longer step flashing along the angled walls of the bay porch roof intersection.
Also seen on slate roofs or a tiled roof where it meets a wall like a porch as well as conservatory roofs car porches and lean to s around bay windows this list really does go on and on apron flashings if you are new to roofing or fitting roof flashings this really is a bread and butter place to start master this and the slightly more difficult flashings like step flashings will seem a lot easier.
Often due to the age of the house the original roofing sealant will break down and start to crack and fall apart.
Flashing bay windows featuring master mason bryan light the brick masonry techniques for builders dvd demonstrates construction techniques with brick that.