I want to replace my 10' X 10' deck boards with exterior treated plywood to
make the area under the deck water tight, I would .like to then put outdoor
carpet/astro turf on the deck. I then plan to enclose the area under this
deck with an enclosed area with vinyl windows and storm doors to extend the
seasons a bit. The entry into this new room from my house is from my walk
out basement out to the level where my pool is.

So the question is, will the plywood stand up over some years to being
almost flat and not delaminate etc.

Thanks, Rich