Step flashing at vertical wall?

[jlybolt]

Thank you for the replies . After researching and calling shingle manufacturers, it is recommended that step flashing be used at veritcal wall to roof junctions. Will builders start using it more often, I dont think so. I think its faster for everyone involed to just put down a long piece of L shaped flashing then to install step flashing. After all, today its about how fast you build them. Another poor practice in my opinion is that at these vertical walls the siding will go all the way down to the roof deck. No space between the two materials to prevent water damage/ rot.

[Ralph Smith]

All shingle roofs need step flashing at vertical walls running up the slope where as walls running along the slope use a continous piece. The idea of using a one piece flashing, on a verticle wall running up the slope, is like asking the shingle manufacturer to void the warranty and the roof WILL leak.