I have a gambrel roof. At the transition slopes (from 4/12 to 20/12 pitch) I have a leak. I just recently had the roof reshingled. The old ripped off and new felt as welll as shingles. They did not put in any flashing on the transition edge and that's where the leak seems to start. How would I go about repairing this? My first thoughts are: to tear off the first row of shingles above the transition edge, then cut the felt and wedge my way up under the felt with tin flashing. And bring the flashing down on top of the first row of shingles after the transition slope. Any help! I am having a problem with this one!