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