The Patriot Post Mount can be installed into wood, concrete or composite surfaces. That said, we do not suggest securing the Patriot to deck boards alone. We recommend using a pair of 2x8s on their side attached to the deck framework as blocking so that the post is being secured to something more structurally sound that just the deck board
We also do have the SPB Kit/Underdeck Anchoring Plate available for added stability. You can find that here.