I have been in the building trades for 26 years and I have seen a lot of poorly flashed decks. I would like to re-do my decks with a quality composite decking and flash the hole deck with Everflashing. F.E.M.A. has a flier out warning how poorly flashed decks can fall off homes. My new years resolution would be to let all home builders, and do-it-yourselfers the serious water issues that can occur if not properly flashed.