Can someone please tell me what's the name of the metal wrap in the first pic? It wraps the top of the wall on my roof top. My roof has a rubber layer on it and it goes up to inside the wall. On top of the wall, it is the metal wrap. It is old and cracks open, which causes leaks in my apartment. What's the name of this metal wrap if I need to replace it? How much normally does the material cost (per square, unit, etc.)? Thanks so much!