Flashing between corrugated roof porch and mobile home

[jkeen]

Im trying to find out how to put flashing between a 12 foot wide ribbed roof porch and TPO roofing on a mobile home. it needs to fit into the grooves of the roofing on one side and lay flat up against the mobile. Theres about a three inch gap between the roof on the porch and the home that the flashing will have to step up over. Any help would be appreciated. Thank you. Pictures are included.

edit: Is it possible that I could simply flash the gap with more TPO? It seems like it would be a good choice, since its flexible enough to adhere to the groves in metal roofing.

 

[Djwilliams37]

Looks to me like you need to get something under the top panel such as lead flashing instead of sticking a flashing to the top. However, lead is rather more expensive for this length than the stick on alternatives but it will last well