I googled z bar and I can kinda visualize how that works, but I don't see how to protect the front edge of either the roof cap or this z bar from coming into contact with water, I'm sure that's the mostly like spot for the cap to leak. Relying just on caulk or roofing cement seems like a bad idea. I was thinking that maybe a slit needs to be cut into the metal a above my hole and then slide the front lip of the cap under that with butyl caulk around the bottom of the cap and the top with screws around the front lip and sides to keep it water tight.
So basically I want to lap the metal roofing over the front edge of my roof cap and leave the back end of the cap on top of the metal to continue to run water like it should naturally.
Thanks and let me know if what I am thinking is right or wrong. I want to have the game plan nailed down before I even touch the roof, obviously you don't want to wing it after you've cut a hole in the roof.
P.s. I asked a family friend who is a roofing contractor and his best idea was to up them up at the ridge where the ridge cap would cover the front edge and install like normal. That idea makes sense but it doesn't seem like the only way this can be done.
Thanks,
Darius.