Most Valley leaks start at a penetration, not in the middle of the field.
Chimneys, valleys, pipe boots, and skylights move and crack. We inspect those first on a leak call. If a boot or flashing will stop the water, we replace it. If the field is worn out, we say you need more than a patch.
This is roof repair, not five separate mill services. One look, one written scope. Hours 7am–5pm. Call (669) 294-1760.