IMPORTANT flashing info in this article 

This is a great article on plaza deck waterproofing and applies equally to regular decks as well…there is a BIG issue about flashing! Read it carefully and make sure to use only bonderized flashings with your deck materials is what I'm reading and  that is discussed about 3/4 down the page… 
Bill Leys-The Deck Expert
805-545-8300 Central California
424-235-3196 S California
831-244-0874 N California  interior and exterior concrete flooring by CCW Learn more about deck waterproofing at  
 Feeling Social?