Bought this house 2 years ago and have been neglecting correcting this.  Not the best roof job in the world.

View from up roof:


View from front of "problem area":


View "underneath problem area":


As you can see, there can be quite a bit of water being channeled through this valley, and into the "underneath problem area".  The never finished the stucco as you can see in the last pic all the way to the left.

How would you guys suggest the best way to divert the most amount of water away from this venerable area?  I was thinking either a section of gutter or even a formed "J" to get water towards the front of the upper roof line in the 2nd pic.  Also, perhaps some "L" channel at about the 2nd shingle line up from the rock in the last pic?

I hope my descriptions are somewhat clear.

Thanks for any help.

A lot of the houses in my subdivision have roofs with similar problems. Most of them have "L" shaped rain diverters to move the water to the gutters.



Like this:











Your roof is obviously more complicated, but that might still be the easiest solution.