I am re-roofing with comp shingle. The photo shows the current w-valley for my old wood shake roof. It seems cut too short, and lacks extra flashing to better direct the flow into the upper gutter and the roof plane at right. There is also no kick-out action to keep valley water away from the small undershot.
Q1. Is this flashing detail 100% correctable ?
Q2. What do I specify, in tradesman’s terms, to better install the new valley and get this issue corrected?
Q3. Also, the end of the upper gutter should be installed as close as possible to the valley intersection line to best capture the exit flow. Is this feasible with half-round gutters, or am I restricted to K-style gutters and/or fascia AKA straight gutters?