I live on a sand dune. My entire yard is sand and there isn't any dirt. Will the floating deck work?

Hmmm..... Interesting yard. Must make back yard sports a challenge. You should not have a problem building a deck though. Sand is a good base for building decks. When you build you might want to water the area down so sand does not move away from around the blocks. The only problem I can see is wind or other weather takes sand away from around the blocks. I haven't heard of this happen but not many people are building on sand like this. When your done you should cover the sides with something to block the wind from moving the blocks around.

Deckman