Soggy Floor - help needed

[deepsushi]

I rebuilt this same floor /hatch on my inboard last spring. I pulled all the old plywood out and replaced it with 1/2" plywood squares ala Strick. Glassed over it with a layer of 1708. I beveled all the edges at a 45 angle so I could completely encapsulate the plywood. Originally some of the plywood edges were exposed which allowed water to rot out the plywood. So far so good --