We recently installed a drip edge flashing detail on a tile roof. There is quite the need for this as many times water finds it’s way behind the aluminum eaves trough and stains the fascia board. This is due to inadequate tile overhang and the ability of water to wick up and along the underside of the tile.
The solution is simple although labour intensive. Moving all the tiles out of the way is required and although most tiles are not nailed on an entire tile roof, the first row usually is. This solution has proven effective.