Flat roofing has some advantages but when it ages or falls into disrepair it can be troublesome.
How to remove roll roofing.
Pry up the ends and pull off the cap.
Leaks form and the materials erode into something that is better.
Clean the rolled roofing before you finish.
And tie it into your hip roof.
Place the top edge of the roofing along the chalk line.
This should give you a 1 inch overhang on the eaves including the top edge.
How to remove old flat roofing.
Use your razor knife to remove any excess rolled roofing.
This is a long video but it will show you how to do it.
How to remove repair and install a flat roof.
Roll out and cut roll roofing to cover the length of the roof.
Make sure you offset yo.
If you can lift the edges use some more cement to seal them in place.
Take special note of the corners and edges of the roof.