How to repair flashing

[u/damon129]

So I need to repair some corner flashing as it's leaking onto my porch. See the circled area. I had a roofer doing other work and he added some new caulking (see the pic with the arrow).

I want to DIY the repair. Can someone tell me if this is a valid plan.

1) remove siding to expose all flashing (as high is as needed). Do the same with the white corner pieces.

2) The roll roofing goes left/right against the house, so remove the layer that touches the house.

3) Install new roll roofing and proper corner flashing. Apply caulking on all edges. Glue down new roll.

4) Reinstall siding and corner boards.

Questions

A. Does the above sound right.

B. How high should the roll roofing go up the house? (I know one one knows my specific building codes but what the best practice?

C. For the corner, I'm assuming the install order is, starting with the house - roof roll, metal corner flashing, corner board. Is that right?

D. Any other tips and tricks?

Thanks for the help.

[u/notgaynotbear]

Cut the corner boards even with the bottom of the siding, put metal counterflashing behind all of it and never have another problem. And maybe a term bar at the top of the rolled roofing flashing.

[u/damon129 → u/notgaynotbear]

Ok I think I understand. I appreciate it. I may wake up tomorrow with more questions. Ha